Integrated Earthquake
Simulation
Muneo Hori
Architected Materials- a Playground for
Computational Mechanics
D.M. Kochmann
Introduction to Numerical
Methods for Variational
Problems
byHans Petter Langtangen& Kent-Andre Marda
Book Review
by Dan Givoli
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2 Integrated Earthquake Simulation
Muneo Hori
6 Architected Materials - a Playground for Computational Mechanics
D.M. Kochmann
12 Introduction to Numerical Methods for Variational Problems
Hans Petter Langtangen & Kent-Andre Marda
Book Review by Dan Givoli
14 PACM

Polish Association for Computational Mechanics

16 UKACM UK Association for Computational Mechanics

contents

18 USACM US Association for Compuatational Mechanics
20 GACM

German Association for Computational Mechanics

22 GIMC

Gruppo Italiano di Meccanica Computazionale

24 CEACM

Central European Association for Computational Mechanics

25 SCMC

Sociedad Chilena de Mecánica Computacional

26 ABMEC Associacao Brasileira de Métodos Computacionais em Engenharia
28 JACM

Japan Association for Computational Mechanics

30 AMCA

Asociación Argentina de Mecánica Computacional

32 KSCM

Korean Sociery for Computational Mechanics

33 APMTAC Assoiacao Portuguesa de Mecánica Teórica, Aplicada e Computacional
34 SEMNI

Sociedad Española de Mecánica e Ingeniería Computacionales

36 JSCES

Japan Society for Computational Engineering and Science38 Conference Diary Planner

I ntegrated E arthquake S imulationby
Muneo Hori
horimune@jamstec.go.jp
Japan Agency
for Marine-Earth
Science & Technology“ ... IES is thefoundationof developing
the digitaltwin fornaturaldisasters. ”

Figure 1:
Overview of IES

iacm expressions 51/22 2

ntroduction

I

The estimation of earthquake hazard anddisaster is the first step toward the disastermitigation. A set of empirical equations areused for this estimate; the relation between
an epicenter distance and a ground motion
index and the relation between a groundmotion index and a structural damage
probability are typical empirical equations.
A better tool is needed for more reliable
estimation since the empirical relations are
based on past data and cannot make anaccurate estimate.
A candidate for such a better tool is ahigh-resolution physics-based simulation of
hazard and disaster processes for a given
earthquake scenario. This simulation iscalled integrated earthquake simulation,
IES. High-resolution numerical analysis
has been used to design an importantfacility, such as a high-rise building or along-span bridge. IES is aimed at applying
high-resolution numerical analysis to all
structures located in a target area. We canestimate earthquake hazard and disasterat the same level of seismic design.
IES consists of two parts, earthquake
wave propagation and seismic structural
responses; see Figure 1. The former, whichis regarded as Earth Science simulation,
includes earthquake generation on a source
fault of an earthquake and amplificationof ground motion in shallow grounds. The
latter, which is regarded as earthquake
engineering simulation, is applied to various
kinds of structures, for each of which a
specific numerical analysis method isdeveloped. All the simulations are
implemented into IES for the estimate ofearthquake hazard and disaster.
There are two major difficulties to develop
IES. The first difficulty is large-scale
numerical computation since the highresolution simulation is made for a large
area; the required spatial and temporal
resolutions are 1 m and 0.1 s or less,respectively. High-Performance Computing(HPC) is applied as a solution of thisdifficulty. The second difficulty is analysis
models for ground and structures.
Automated Model Construction (AMC) isdeveloped to solve this difficulty.

Use of HPC
The physics-based simulation of earthquake
hazard and disaster solves a solid wave
equation for ground and structures. The
equation becomes non-linear if thedeformation is large, and an analysis
model of high fidelity ought to be used toaccurately estimate the earthquake
wave propagation and seismic structural
responses. Finite Element Method (FEM)
is a de-facto standard to solve the wave
equation for a body of complicatedconfiguration. Most of the numericalcomputation is spent to solve a matrix
equation in FEM; the dimension of thematrix exceeds 1,000,000,000 for a largescale numerical analysis model of highest
fidelity. Therefore, it is necessary toenhance this solver with HPC capability.

Figure 2:
Algorithm of fast solver
implemented into FEM

We developed a fast solver based on the
conjugated gradient method. The performance of this solver was examined in a few
supercomputers, such as Kei and Fugaku inJapan, SUMMIT in the USA, and Piz Daint
in EU; our achievement of developing an
FEM fast solver is recognized in the field ofsupercomputers as we are finalist of Gordon
Prize four times. The developed fast solver
adapts various numerical techniques suchas trans-precision, an AI preconditioner, atime parallel method, and efficient data storage using FP21; see Figure 2.

data and to generate an input file of various
numerical analysis methods; for instance,
ground elevation and geological data aretransformed into an input file of groundmotion amplification analysis and tsunami
inundation analysis. AMC takes two stepsof data transformation, i.e., all data are
first transformed to intermediate data ofcommon format and the intermediate data
are transformed to an input file. Two-stepdata transformation is necessary for highflexibility, even though it is numericallymore expensive than one-step datatransformation.

Development of AMC system
Examples of IES
A numerical analysis method enhancedwith HPC capability requires a numericalanalysis model of high fidelity for a target
underground or structure. The quality andquantity of available data about the target
are usually limited; for instance, as for astructure, external configuration data are
available but its structural properties are
not open to the public.

We present two examples of applying IES toearthquakes presumed in Japan. The firstexample is Tokyo Metropolis Earthquake.
Cabinet Office, Japan, provides a scenario
for the earthquake. According to thisFigure 3:
Example of numericalanalysis models used
in IESWe develop an AMC system, whichtransforms various data about the target
to an input file of a numerical analysis
method; see Figure 3. Available data are
two- or three-dimensional crust andgeological structure, borehole data ofshallow underground, two- or threedimensional external configuration,
construction year, and structure types ofstructures. The material and structure
properties are guessed using available
empirical relations.
A unique feature of the developed AMC
system is its high flexibility. The system isdesigned to process various kinds of digital
3 iacm expressions 51/22

For each residential building in this region,
IES constructs a set of a one-dimensional
stratified underground model for the surface
ground and a multi-degree-of-freedommodel for the structure. The number ofthe sets is 1,266,706; see Figure 5. It also
computes structural seismic responses ofinfrastructures such as a road network,
lifelines of energy, communication, water,and sewage, using empirical relations;numerical analysis of the infrastructure
is not implemented in IES. The spatial
distribution of structure damages are
obtained for each earthquake scenario;
the location and degree of heavily damaged
area change depending on the scenario.
The physics-based simulation of IES
can make high-resolution estimations ofstructural damages in Kansai Region.
The estimation is useful, as it can be used
for the estimate of post-disaster responses.
The following three post-disaster response
simulations are implemented into IES:
1) mass evacuation simulation;2) traffic demand and flow simulation; and3) economic activity recovery simulation.
Figure 4:Distribution of structural responses computed in IES
for Tokyo Metropolis Earthquake

scenario, IES computes earthquake wave
propagation and seismic structural
responses in the entire Tokyo region.
A three-dimensional numerical analysis
model is constructed for the shallow
surface ground of central Tokyo of 10 km
x 10 km. IES produces ground motion
distribution in 1 m resolution, and, due
to the topographical effects, spatialconcentration of strong ground motion is
obtained. IES computes seismic responsesof 300,000 residential buildings located inthis area, constructing a numerical analysis
model for each and inputting synthesized
ground motion at the site. As expected,
structural seismic responses differ for eachstructure; see Figure 4. The responses
are determined by the natural frequency ofthe structure and the dominant frequency
components of input ground motion.
The second example is Nankai TroughEarthquake. These earthquake scenarios
are given, and IES computes the resulting
earthquake hazard and disaster in Kansai
Region, which includes Osaka, Kobe, Nara,
Hyogo, and Kyoto.
iacm expressions 51/22 4

As for Nankai Trough Earthquake, theestimate of the traffic demand and flow
simulation is interesting as it shows theoccurrence of severe traffic congestion
in several places in Kansai Region; see
Figure 6. It is more difficult to assure
the quality of the post-disaster response,
which is regarded as social sciencesimulation, compared with the physicsbased simulation. Still, the estimate of
the post-disaster response is essential
for a fast and efficient recovery from theearthquake disaster. The developmentof a more reliable post-disaster response
simulation is needed.

Concluding Remarks
IES is developed to carry out physics-based
simulations of earthquake hazard anddisaster, and it is applied to two earthquakes
presumed in Japan, and its potential
usefulness is demonstrated. A similar
physics-based simulation is expected forfloods, high tides, and volcano eruptions.
It is thus necessary to enhance numericalanalysis methods with HPC capability andto improve an AMC system that can process
more data.
Better preparedness and resilience fornatural disasters can be achieved bydeveloping a digital twin of cities andregions. Various scenarios of natural
disasters as well as mitigation plans andrecovery strategies are examined using thedigital twin. Integrated simulation systemsuch as IES is the foundation of developing
the digital twin for natural disasters. l

Figure 5:Distribution of structural damage responses computed
in IES for three scenarios of Nankai Trough Earthquake

References
[1]
[2]
[3]

M. Hori, Introduction to computational earthquake engineering (3rd edition), World Scientific, 2018.
M. Hori, T. Ichimura and L. Maddegedara, Integrated Earthquake Simulation, CRC Press, 2022.
T. Ichimura, K. Fujita, R. Kusakabe, K. Koyama, S. Murakami, Y. Kikuchi, T. Hori, M. Hori, H. Inoue,
T. Nose, T. Kawashima, and M. Lalith, Extreme Scale Earthquake Simulation with Uncertainty
Quantification, 2022 SC22: International Conference for High Performance Computing, Networking,Storage and Analysis (SC), 37-47, 2022.
Figure 6:
Distribution of degreeof traffic congestions
computed from traffic
demand and flow
simulationa) ordinaryb) basicc) east sided) land side
5 iacm expressions 51/22

A rchitected M aterials– a P layground for C omputational M echanics
D.M. Kochmann
Department of
Mechanical &Process Engineering
ETH Zurich,
Switzerland
dmk@ethz.ch

Architected Materials
Architected materials have gained
tremendous popularity over the past
decade, enabled by advances in additive
manufacturing down to the nanoscale aswell as the enormous material property
space that has been unlocked by the
careful structural design across scales.
The recent surge in truss-, plate-, andshell-based architected materials – withperiodic or random arrangements of theirstructural features – is only the tip of theiceberg of the available design space(see Figure 1). Towards a successful
exploration of such cellular solids(especially towards real-life applications),
it is key to understand the link between thevast structural design space on the
microscale and the resulting effective
property space on the macroscale. (Notethat micro and macro here do not refer tospecific length scales but merely to thosescales of small-scale features and effective
properties, respectively.) This calls forcomputational approaches that allow us
to address the two primary modeling challenges: forward homogenization aims at
extracting the effective material properties
from a known microstructural architecture,
whereas inverse homogenization (orinverse design) seeks to identify microstructures that possess a given target property
combination. Although we focus onmechanical properties here, this extends
far beyond mechanics (including thermal,
chemical, optic, electro-magnetic, andother material properties of interest).

The field of computational mechanics has,of course, pursued many strategies toaddress the aforementioned challenges –from computational homogenization andFE2 to topology optimization – as well as
tools for material modeling – from molecular
dynamics (MD) to the finite element method(FEM). Many of the methods originallydeveloped for `conventional’ materials havebeen adopted for architected materials.
Yet, architected materials have posed newchallenges – and they have rejuvenatedand simplified some existing approaches.
They also provide new opportunities forengineering the effective properties ofmaterials with, e.g., exceptionally highstiffness-to-weight or strength-to-weightratios [1] as well as energy absorbing or
wave guiding capabilities [2].
Homogenization Approaches

Computational homogenization withperiodic boundary conditions applied to arepresentative volume element (RVE) has
proven well suited for efficiently obtaining,e.g., the effective stiffness or stress-strain
response of a periodic architected material[3]. Caution is required when modelinglarge deformation, since low-density
structural architectures promote buckling,which requires to perform stability analysis
on the fly or a careful choice of theRVE [4]. Especially when using a structuralrepresentation (such as beam or discrete
elastic rod elements for trusses), theproblem to be solved is computationallyinexpensive.
Figure 1:
Examples of architected materials to be modeled (from left to right):
hierarchical truss shown by CAD, SEM, and FEM [9], shell-based spinodal architectures in simulations andexperiments [21], plate-based architected materials [23], and multistable, shape-morphing structures [11]iacm expressions 51/22 6

For the same reason, FE2-type
formulations have gained popularity [5](see Figure 2). What makes FE2 efficient inthis setting is the small number of degrees
of freedom required at the levelof the RVE: compared to a solid element
representation as in classical materials(e.g., when homogenizing composites
or polycrystals), the description of truss
networks through the displacements androtations of a small number of nodes (e.g.,having a few beam elements per strut)
makes it affordable to homogenize on the
fly in a general, nonlinear FE2 setting. Witha sufficiently large RVE, this works not only
for elastic deformation (including bucklingand localization) but also for inelastic basematerial behavior, e.g., to model viscoelastic trusses [6]. Using the analyticalconsistent tangent for iterative solvers
makes for efficient two-scale simulations[5]. Note that an RVE composed of beam
elements requires both translational androtational degrees of freedom, which
has been dealt with in different ways
(connecting both translations and rotations[4-6] or only translations [7] to themacroscale) – and which canvibrations during stereolithography) drastically reduces the effective stiffness of hierarchical truss-based architected materials(which could be predicted by FEM quite
accurately when accounting for wavinessof the right amplitude and wavelength) [9].

naturally lead to strain-gradient effects
or micropolar-type continua [4]. The
combination of translational and rotational
unknowns furthermore furnishes thehomogenized continuum with an intrinsic
length scale, which becomes apparent
when modeling structures undergoing
localized instability [4].

Figure 2:
Homogenization-based and hybrid modeling (from left to right):
FE2-type modeling of inelastic beam networks [6],hybrid approach with fully resolved truss nodes and efficientbeam representations in between [8],and continuum modeling of reconfigurable structurescompared to experiments [11]Homogenization techniques have also
been applied to reconfigurable or shapemorphing structures with applications fromsoft robotics to mechanical logic and signal
processing. The reconfigurable unit cell,typically having two or more stable equilibrium configurations, is the analog of aphase-transforming atomic unit cell – andthe effective response of the reconfigurable
architecture can be conveniently described
as a phase-transforming continuum [10-11].
Without having to do on-the-fly numericalhomogenization, even analytical homogenization approaches based on experimentally or numerically calibrated multi-welleffective energy densities proved sufficient
to reproduce various responses, e.g., inperiodic multistable structures with preprogrammed defects (Figure 2) [11].

Spatial Grading
Of course, the devil is in the detail. Struts
in reality are rarely slender; strut junctions
are neither compliant (as in trusses) nor
rigid (as in frames) – which has promoted
hybrid approaches of, e.g., fully refinedjunctions connected by beam elements [8](Figure 2), or the a-priori computation of
the effective response of strut segments
and junctions in hierarchical trusses [9].
Imperfections, of increasing importanceat decreasing length scales, render deterministic approaches often inappropriate
and can significantly affect the effective
response. We showed, e.g., how strut
waviness (introduced by mechanicalThe above concepts of computational
homogenization extend beyond periodic
structures. They are equally applicable tospatially graded designs, as long as thespatial grading is relatively smooth (i.e.,changes in unit cell topology and/or geometry must be smooth compared to the characteristic fields of the macroscale boundary
value problem). This can be exploited, e.g.,
for the topology optimization of complex
truss networks. We have pursued a twoscale approach [12], in which an inexpensive continuum problem is formulated on
the macroscale, which uses FE2 and7 iacm expressions 51/22

the resulting distribution of the design
parameters onto a discrete truss with apre-defined characteristic length scale.
This effectively decouples the macroscale
optimization problem from the fine-scale
truss generation and hence gains efficiency
over single-scale approaches.

Figure 3:
Fracture simulations based on a truss quasicontinuum (TrussQC)
formulation [16], retaining full resolution(i.e., discrete structural representation) near the crack tip whilecoarse-graining into a homogenized continuum
away from the crack. Adaptive refinement tracks stress bands
and ensures sufficient resolution during impact

defines for each quadrature point on themacroscale a distinct truss RVE on thesmall scale (Figure 4). When describing the
RVE architecture by a number of design
parameters (such as strut thicknesses or
topological information such as connectivity
or Bravais basis vectors), we can solve
the macroscale optimization problem byadjusting the design parameters in eachquadrature point (whose effective responseon the macroscale is obtained from onthe-fly homogenization). We finally projectAs a second example, spatial grading has
been exploited to guide elastic waves intrusses [13]. Borrowing from atomic-level
concepts, the wave dispersion in periodic
trusses is well described by classical Blochwave analysis, assuming a propagating
plane wave and solving the dynamic
eigenvalue problem on an irreducible
unit cell with Bloch boundary conditions(Figure 5). Spatially graded trusses, bycontrast, offer a much richer design space.
Instead of uniform wave dispersion,
waves can be guided or attenuated along
pre-defined paths by locally adjusting thetruss architecture. As discrete structural
calculations become prohibitively expensive
when considering large structures(especially when interested in iterative
design optimization), we have adopted
ray tracing – classically known, e.g., fromseismic waves or photonics – to the field ofgraded architected materials [13]. Unlike
for seismic waves, here not only theeffective elastic properties change frompoint to point but also the dispersion
relations. Compared to optics and photonics, the mechanical problem is richer due
to the vector-valued displacement field (theformer two deal with scalar-valued fields).
The resulting ray tracing machinery
assumes a locally periodic architecture,so that the local effective wave dispersion
can be obtained, as before, from Blochwave analysis but is modulated by thespatial grading in the truss architecture [13].
Discrete-to-Continuum Coupling

Figure 4:(left) Spatial grading of the truss varies the local effective properties[12]. Two-scale topology optimization of spatially grade trusses uses
on on-the-fly homogenization in every quadrature point on themacroscale; (right) projection leads to graded trusses with adjustable
length scale
iacm expressions 51/22 8

Computing the fracture toughness is a good
example of where an architected material
cannot be described as a homogenizedcontinuum [14]. For a conventional linear
elastic material, linear elastic fracture
mechanics predicts the stress and strain
fields around the crack tip under remoteloading, admitting the definition of a fracture
toughness from the scaling of the stressfields around the crack tip. Consider, bycontrast, a periodic truss made of linear
elastic struts. The effective elastic
response is characterized by homogenizedelastic moduli, yet the fracture toughness
requires considering the discrete nature of
the crack tip: fracture occurs when the strut
with the maximum stress reaches its limit.

This in turn requires a discrete representation at the crack tip – and the exact
structural arrangement near the crack tip isessential. For example, triangular or
hexagonal truss lattices in 2D have aneffective isotropic stiffness (so thathomogenizing the architected material
around the crack tip would show no
orientation dependence). Yet, theirfracture toughness depends strongly
on the orientation of the crack tip withrespect to the truss architecture [14,15].
Discrete calculations, unfortunately,
reach their limits when large 3D trusses
are to be simulated, especially whenlong-range stress bands emanate fromthe crack tip.
To this end, we have borrowed thequasicontinuum technique from atomistic
modeling, which retains full discrete
resolution where needed while efficiently
coarse-graining in the far-field (Figure 3).
Atoms and representative atoms in theatomistic context become, respectively,
truss unit cells and representative unit cells
in this new context [16]. As a specialty,
we coarse-grain not based on truss nodes(as this would lead to an overly stiff
interpolation of the effective mechanics
within coarse-grained regions) but basedon unit cells. Hence, every ‘node’ in the
QC setting carries the degrees of freedomof an entire unit cell. This not only admits
the seamless transition between fully
resolved discrete and homogenized continuum regions, but it also allows capturing
the effective truss response in the latterregions efficiently albeit accurately, as it
does not assume an affine deformation(as in the classical local QC method).
Finally, adaptive remeshing (based on a
local strain criterion) enables the efficienttying of high resolution to evolving regionsof interest – such as the stress bands
emerging from a crack tip under remoteloading, or the growing damage zone
underneath an indenter or impactor(Figure 3).
Of course, reality is more complex than
this simple example – plasticity at the strut
level, material size effects at the nanoscale,
localized failure at strut junctions, etc. allcontribute to the effective fracture behavior.
Moreover, real-world trusses are neverinfinite, and the finite size gives rise tosurface effects that may dominate thefracture response even in assemblies of
millions of truss unit cells (see the recent
work in [17]). This is where coarse-grained
approaches can help.

Figure 5:
Wave paths are being bent by the spatial grading of a 2D truss,
simulated by ray tracing [13]Inverse Design
Topology optimization was introduced todeal with the inverse challenge of finding
optimal architectures with target properties.
As an efficient alternative we have exploredways to use machine learning (ML) for the
inverse design of, e.g., truss-based andspinodoid architected materials with asdesigned 3D anisotropic stiffness [18,19].
While the forward homogenization
approach (discussed above) is usuallywell-posed, the inverse design challenge is
generally ill-posed. Simply put, for a given(deterministic) architecture one can predict
its unique effective properties. However,a given set of target properties may be
associated with many different architectures(e.g., consider the vast amount ofarchitectures that result in isotropic elastic
moduli). This is both a challenge (see,e.g., classical topology optimization’s
dependence on the initial guess) and an
opportunity (receiving many candidate
architectures with (close to) identicaleffective properties).
For given design parameters, we generatea rich dataset of distinct design realizations
along with their associated effective
properties obtained from computational
homogenization. This dataset is used totrain a neural network, whose loss is givenby the distance between the queried
properties and the effective properties ofthe predicted design [18] (e.g., the norm
between two fourth-order stiffness tensors
for the elastic properties, or the differencein principal components of a stress-strain
response). As the property prediction
9 iacm expressions 51/22

Figure 6:
Inverse design of spinodoids [18] and of truss-based [19] architected materials by machine learning, withapplication to bio-mimetic bone implants having target anisotropic 3D stiffness
involves a computationally expensive
homogenization step, we bypass thelatter by a second, a-priori trained neuralnetwork, which serves as a homogenization
approximator (and can also be used
individually for efficient forward homogenization). This ML strategy has been
applied to both truss-based architectures[19] and spinodal-type stochastic cellular
networks [18] (Figure 6). In both cases,
a low-dimensional parameterization of
the design space is key to efficient andaccurate predictions (this is a key advantage over, e.g., image-based approaches,
which use the full pixel information as
design parameters). Through thisframework we have found, among
others, cellular designs that match the
3D anisotropic stiffness of bone samples,
providing a route to patient-specific,
biomimetic bone implants.
Concluding Remarks and Open
Challenges
The above description is, of course, notexhaustive. Many multiscale modelingand optimization techniques have been
proposed for architected material design
across scales [3]. At the same time, thelist of open challenges in the context ofmodeling architected materials is long andgrowing. A key challenge has been theproperty prediction and inverse design ofarchitected materials with imperfections[20]. Fabrication-induced imperfections(ranging from variations in the structuralgeometry and the base material properties
to topological defects) break the periodicity
and symmetry and are stochastic in nature,
hence calling for statistical approaches.
iacm expressions 51/22 10

Especially at small scales, size effects wereshown to dominate the effective mechanicalresponse (including, e.g., defect starvation
mechanisms in nanoscale structures, basematerial hardening in nano-crystalline basematerials, and plastic size effects in metals). Taking these into account requires
accurate models at the smallest scales,
where continuum mechanics ceases toapply and atomistic techniques such as MD
are required (which, however, come withsevere spatial and temporal limitations).
Moreover, modeling the fabrication processof architected materials by methods ofadditive manufacturing could enable amore holistic optimization route of the asfabricated effective properties. Althoughimperfections have been accounted for,e.g., in topology optimization or forward
homogenization, the state of the art isstill far from modeling the full fabrication
process at realistic scales. When it comesto the inverse design, optimizing for linear
properties such as the elastic stiffness orwave motion is only the beginning, andrecent work has started to address inverse
designing inelastic effective behavior(including plasticity, damage and failure,
friction, and contact). The same holds
for the (forward and inverse) homogenization of nonlinear dynamic behavior [22].
Finally, the availability of codes is anotherbottleneck, as many of the approaches
mentioned above are ‘home-grown’ andfew open-source codes are available.
Acknowledgements
I sincerely thank all those team members(past and present) as well as collaborators
who have contributed to the work presented
here. This includes, in particular, Jan-

Hendrik Bastek, Charlie Dorn, Raphael Glaesener, Vignesh Kannan, Romik Khajehtourian, Sid Kumar,
Helen Le Clézio, Claire Lestringant, Greg Phlipot, Carlos Portela, Kaoutar Radi, Bastian Telgen, Alex Zelhofer,
Li Zheng, and collaborators Julia R. Greer and Ole Sigmund. (A big apology to all those whose names I forgot
to mention here). Funding from the U.S. Office of Naval Research, National Science Foundation, Army
Research Office, the ERC Horizon 2020 Program, and ETH Zurich is gratefully acknowledged.
Codes
Our codes for the homogenization of elastic properties and the calculation of dispersion relations for periodic
structures are freely available from www.ae108.ethz.ch. For a list of other available codes (e.g., for the ML-based
inverse design), visit https://mm.ethz.ch/facilities-and-codes/codes.html. lReferences
[1]

[2]
[3]
[4]

[5]
[6]

[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[21]
[22]
[23]

L.R. Meza, G.P. Phlipot, C.M. Portela, A. Maggi, L.C. Montemayor, A. Comella, D.M. Kochmann, J.R. Greer,
Reexamining the mechanical property space of three-dimensional lattice architectures,
Acta Mater., 140:424-432, 2017.
M.I. Hussein, M.J. Leamy, M. Ruzzene, Dynamics of Phononic Materials and Structures: Historical
Origins, Recent Progress, and Future Outlook, Appl. Mech. Rev., 66:040802, 2014.
D.M. Kochmann, J.B. Hopkins, L. Valdevit, Multiscale modeling and optimization of the mechanics ofhierarchical metamaterials, MRS Bulletin, 44:773-781, 2019.
R.N. Glaesener, E.A. Träff, B. Telgen, R.M. Canonica, D.M. Kochmann, Continuum representation of
nonlinear three-dimensional periodic truss networks by on-the-fly homogenization,
Int. J. Solids Strct., 206:101-113, 2020.
R.N. Glaesener, C. Lestringant, B. Telgen, D.M. Kochmann, Continuum models for stretching- and bendingdominated periodic trusses undergoing finite deformations, Int. J. Solids Struct., 171:117-134, 2019.
R.N. Glaesener, J.-H. Bastek, F. Gonon, V. Kannan, B. Telgen, B. Spöttling, S. Steiner, D.M. Kochmann,
Viscoelastic truss metamaterials as time-dependent generalized continua, J. Mech. Phys. Solids,
156:104569, 2021.
A. Vigliotti, V.S. Deshpande, D. Pasini, Non-linear constitutive models for lattice materials,
J. Mech. Phys. Solids, 64:44-60, 2014.
C.M. Portela, J.R. Greer, D.M. Kochmann, Impact of node geometry on the effective stiffness of
non-slender three-dimensional truss lattice architectures, Extr. Mech. Lett., 22:138-148, 2018.
L. Meza, A.J. Zelhofer, N. Clarke, A.J.Materos, D.M. Kochmann, J.R. Greer, Resilient 3D hierarchicalarchitected metamaterials, PNAS, 112:11502-11507, 2015.
R. Khajehtourian, D.M. Kochmann, A continuum description of substrate-free dissipative reconfigurable
metamaterials, J. Mech. Phys. Solids, 147:104217, 2021.
L. Jin, R. Khajehtourian, J. Mueller, A. Rafsanjani, V. Tournat, K. Bertoldi, D.M. Kochmann, Guided transition
waves in multistable mechanical metamaterials, PNAS, 117:2319-2325, 2020.
B. Telgen, O. Sigmund, D.M. Kochmann, Topology Optimization of Graded Truss Lattices Based on
On-the-Fly Homogenization, J. Appl. Mech. 89:061006, 2022.
C. Dorn, D.M. Kochmann, Ray theory for elastic wave propagation in graded metamaterials,
J. Mech. Phys. Solids, 168:105049, 2022.
N. Fleck, X.M. Qiu, The damage tolerance of elastic-brittle, two-dimensional isotropic lattices,
J. Mech. Phys. Solids, 55:562-588, 2007.
F. Lipperman, M. Ryvkin, M.B. Fuchs, Fracture toughness of two-dimensional cellular material withperiodic microstructure, Int. J. Fract., 146:279-290, 2007.
G.P. Phlipot, D.M. Kochmann, A quasicontinuum theory for the nonlinear mechanical response ofgeneral periodic truss lattices, J. Mech. Phys. Solids, 124:758-780, 2019.
A.J.D. Shaikeea, H. Cui, M. O’Masta, Z.R. Zheng, V.S. Deshpande, The toughness of mechanicalmetamaterials, Nat. Mater., 21:297-304, 2022.
S. Kumar, S. Tan, L. Zheng, D.M. Kochmann, Inverse-designed spinodoid metamaterials,
npj Comput. Mater., 6:73, 2020.
J.-H. Bastek, S. Kumar, B. Telgen, R.N. Glaesener, D.M. Kochmann, Inverting the structure-property mapof truss metamaterials by deep learning, PNAS, 119:e21111505119, 2021.
D. Pasini, J.K. Guest, Imperfect architected materials: Mechanics and topology optimization,
MRS Bulletin, 44:766-772, 2019.
C.M. Portela, A. Vidyasagar, S. Krödel, T. Weissenbach, D.W. Yee, J.R. Greer, D.M. Kochmann, Extreme
mechanical resilience of self-assembled nanolabyrinthine materials, PNAS 117:5686-5693, 2020.
K. Pham, V.G. Kouznetsova, M.G.D. Geers, Transient computational homogenization for heterogeneousmaterials under dynamic excitation, J. Mech. Phys. Solids, 61:2125-2146, 2013.
T. Tancogne-Dejean, M. Diamantopoulou, M.B. Gorji, C. Bonatti, D. Mohr, 3D Plate-Lattices: An Emerging
Class of Low-Density Metamaterial Exhibiting Optimal Isotropic Stiffness, Adv. Mater. 30:1803334, 2018.
11 iacm expressions 51/22

Introduction to
Numerical Methods for
Variational Problems
Hans Petter Langtangen& Kent-Andre Mardal
Springer Nature, Cham, Switzerland, 2019

B
O
O
K

ISBN:

978-3-030-23787-5, 405 pages, soft cover, €50 (List Price)

Contents: Preface; 1: Quick Overview of the Finite Element Method; 2: Function
Approximation by Global Functions; 3: Function Approximation by Finite Elements;
4: Variational Formulations with Global Basis Functions; 5: Variational Formulations
with Finite Elements; 6: Time-Dependent Variational Forms; 7: Variational Forms
for Systems of PDEs; 8: Flexible Implementations of Boundary Conditions;
9: Nonlinear Problems; 10: Variational Methods for Linear Systems;
Appendix A: Useful Formulas; References; Index.
The first author, Hans Petter Langtangen, a professor of scientific computing at the
University of Oslo, died before this book was completed. The second author,
Kent-Andre Mardal, a professor of mechanics in the department of mathematics atthat university, finalized the task. The book was published as part of the Springer
series “Texts in Computational Science and Engineering”.
As the authors write in the Preface, this is “essentially a book on the finite element
method, although we discuss many other choices of basis functions and otherapplications than PDEs.”

R
E
V
I
E
W

There are a number of things that I like about this book, and in particular the
subjects that it covers. In addition to the basics of FEM, the reader can find athorough discussion on projection methods in general, and on using the Galerkinmethod with other basis functions than FE shape functions. Non-standard material
includes a nice discussion on the Runge phenomenon and on ways to overcome it,
e.g., by the use of the Bernstein polynomial basis (chapter 2); see figures below.
Chapter 6 is about time-dependent problems, where time discretization is performed
before space discretization. Chapter 8 is also non-standard, discussing special
treatment of boundary conditions, using a Lagrange multiplier method, a penalty
method, the Nitsche method, and more. Chapter 9 on nonlinear problems is also
rarely found in basic books on the FEM.

byDan Givoli
Technion Israel Institute ofTechnology
givolid@technion.ac.il
iacm expressions 51/22 12

H.P. Langtangen

K.A. Mardal

In addition, the book includes many clear figures, a set of nice exercises at the end ofeach chapter, and many FEniCS code segments throughout the book for the various
algorithms discussed.
On the other hand, the book suffers from serious lack of proper proof-reading, andthus contains many mistakes, both in the text and in the equations. Chapter 1 inparticular is full of awkward English phrasings, and looks as if it was never carefully
read by anyone before publication. In addition, the explanations in this chapter
are very confusing. As an example, in eq. (1.4), the PDE is multiplied by a test
function and is integrated over a single element (why?), and this is followed by thestatement that eq. (1.5) (which is a mistake in the equation number) gives rise to
N+1 linearly independent equations, where N+1 is the total number of unknowns
in the problem. The equations that follow also consist of integrals over element
domains, but the text continues to talk about the global problem. In Chapter 2, p. 8.,
the local support of basis functions is explained by the words “each function isnonzero except in a small part of the domain.” Of course, “nozero” should be “zero”.
These and many other mistakes, scattered throughout the book, will make reading
the book a frustrating experience for the average reader.
In addition, I did not like some of the notation and example choices made by theauthors, although this may be a matter of taste. As an extreme example, in
Chapter 3, p. 80, a vector with entries such as 2-h (a pure number minus the element
length) appears. This is either an “anti-educational” mixture of numbers and symbols,
or simply another typographical mistake.
Hopefully, a second edition of this book, with careful proofreading, will be published,so as to allow the readers to fully enjoy the original view the authors give to thel
FEM and related topics.

The 9 Bernstein basis functions of order 8(this is Fig. 2.16 in the book)The 9 Lagrange basis functions of order 8(this is Fig. 2.17 in the book)13 iacm expressions 51/22

Polish Association for Computational Mechanics

CMM-SolMech 2022
n 5-8 September 2022, a joint scientific event including the 24th International
Conference on Computer Methods in Mechanics and the 42nd Solid Mechanics
Conference (CMM-SolMech 2022) was held in Świnoujście, a city located at theBaltic See coast in north-western Poland. The CMM-SolMech 2022 Conference wasco-organized by the Polish Association for Computational Mechanics (PACM), Institute ofFundamental Technological Research of the Polish Academy of Sciences (IPPT PAN)
and the West Pomeranian University of Technology in Szczecin (ZUT).

O

The series of CMM conferences is organized by the PACM. Started in 1973, the CMM
conference series is dedicated to numerical methods and their applications to themechanics-based problems. The series of SolMech conferences have been organizedby the Institute of Fundamental Technological Research, Polish Academy of Sciences(IPPT PAN) since 1953 and cover all aspects of solid mechanics. Due to the unusual
situation caused by COVID-19, it was decided to organize a joint conference – CMMSolMech 2022 – gathering the two communities.
Prof. Michał Kleiber (PACM, IPPT PAN) acted as the Conference President. The ScientificCommittee was chaired by Prof. Tadeusz Burczyński (PACM, IPPT PAN) and theOrganizing Committee was co-chaired by Prof. Ryszard Buczkowski from the West
Pomeranian University of Technology in Szczecin and Prof. Stanisław Stupkiewicz from
IPPT PAN.
The scientific programme of the CMM-SolMech 2022 conference was composed of
8 plenary lectures, 17 thematic sessions and one poster session. There were nearly 300
participants from Poland and 23 other countries. The following distinguished scientists held
the interesting plenary lectures on current research topics:• Matthew Gilbert, University of Sheffield, UK, Application of layout optimization
methods in engineering analysis and design• Dennis Kochmann, ETH Zürich, Switzerland, Microstructure of ferroelectric ceramics:
simulation meets experiment• Jože Korelc, University of Ljubljana, Slovenia, Sensitivity analysis based
computational modeling• Laura De Lorenzis, ETH Zürich, Switzerland, EUCLID – Efficient Unsupervised
Constitutive Law Identification and Discovery• Dariusz Łydżba, Wrocław University of Science and Technology, Poland, Overall
microstructure response function and its application to recovery of microstructure• Thomas Pardoen, Université Catholique de Louvain, Belgium, On-chip fracture
mechanics to explore fracture toughness of freestanding ultra-thin films frombrittle to ductile, down to 2D materials• Jacek Tejchman, Gdańsk University of Technology, Poland, Application of acoupled DEM–CFD approach to engineering problems• Tarek Zohdi, University of California, Berkeley, USA, Modeling and simulation
tools for industrial and societal research applications: digital twins and genome-based
machine-learning
It has become a tradition that during the CMM conferences the O.C. Zienkiewicz
Medal Awarding Ceremony takes place to honour outstanding researchers in the fieldof computational mechanics. This year’s awarding ceremony was held during the congress
opening. The 2022 laureates of the O.C. Zienkiewicz Medal are:
• Prof. Jacek Tejchman in the category for the whole of activity,• Prof. Jože Korelc in the category for foreign scientists of particular merit for thedevelopment of computational mechanics in Poland.
The awards were presented by Prof. Michał Kleiber (Commander of the Medal Chapter)and Prof. Tadeusz Burczyński (Chancellor of the Medal Chapter), during the ceremony
conducted by Prof. Jerzy Rojek (President of PACM).
iacm expressions 51/22 14

for all inclusions under PACM please contact
Jerzy Rojek
jrojek@ippt.pan.pl

During the conference there was also held the Jan Schmelter competition for young
scientists. Jury of the competition led by prof. Ewa Błazik-Borowa (Lublin Universityof Technology) awarded three prizes to the following young scientists:• 1st place: Vishnu Ambikadevi Rajasekharan – Uni. Carlos III of Madrid, Spain• 2nd place: Rabea Sondershaus – Technical University of Darmstadt, Germany• 3rd place ex aequo: Monika Zielińska – AGH Uni. of Science & Technology, Poland
Agata Mrozek – Poznan Uni. of Technology, Poland
The General Assembly of PACM was held during the conference. At the meeting, PACM
president Jerzy Rojek presented a report on PACM activities and achievements during thelast term 2019-2022. The report was accepted unanimously. A new Managing Board of the
PACM was elected for the next term 2022-2024. Prof. Wojciech Sumelka from Poznan
University of Technology was elected the new President of PACM.
The CMM-SolMech 2022 conference was a successful, well-organized scientific event.
More details on CMM-SolMech 2022 conference can be found at the conference web site:
http://cmm-solmech.ippt.pan.pl/. The next, 25th International Conference on Computer
Methods in Mechanics will be organized together with the 5th Polish Congress of
Mechanics. The joint PCM-CMM 2023 conference will be held in Gliwice (Upper Silesia)
on 4-7 September 2023.

Figure 1:
Awarding Ceremony of the O.C. Zienkiewicz Medal. Fromleft to right: Michał Kleiber – Commander of the Medal
Chapter, Tadeusz Burczyński – Chancellor of the Medal
Chapter, Jože Korelc – recipients of the Medal in the
category for foreign scientists of particular merit for thedevelopment of computational mechanics in Poland,
Jerzy Rojek – President of PACM

Figure 2:
Awarding Ceremony of the Jan Schmelter competition for young
scientists. From left to right: Michał Kleiber – President of the
CMM-SolMech 2022 Conference, Stanisław Stupkiewicz –Co-chairman of the Organizing Committee, Jerzy Rojek – Presidentof PACM, Vishnu Ambikadevi Rajasekharan – winner of the Jan
Schmelter competition for young scientists, Ewa Błazik-Borowa –chair of the jury of the Jan Schmelter competition, Maciej Taczała,West Pomeranian University of Technology in Szczecin

Advanced FEM Course
A two day short course titled: Implementation of the DPG Method in a FE Code Supporting H1, H(curl), H(div)and L2-Conforming Finite Elements was held at the Poznan University of Technology on 14-15 June 2022.
The course was organized by the PACM and the Polish Section of GAMM. The lectures were delivered by Professor
Leszek Demkowicz and his former PhD student, Dr Stefan Henneking, both from the Oden Institute at the University ofTexas at Austin, USA. The presentation focused on three topics: a) fundamentals of hp3D, a parallel MPI/openMP 3D
Finite Element code supporting discretization of arbitrary variational formulations set up in the exact energy spaces on
hybrid meshes (tets+hexas+prisms+pyramids), b) fundamentals of the Discontinuous Petrov-Galerkin (DPG) method,and c) implementation of the DPG method within the hp3D
Figure 3:code. The hp3D library along with a documentation is available inParticipants of the Advanced FEM Course,
the public domain. The technology was illustrated with ain the middle, lecturer Prof. Leszek Demkowicz
simulation of Transverse Mode Instabilities (TMS) in opticalamplifiers. The problem consists of a system of two nonlinear
time-harmonic Maxwell equations coupled with a transient heat
equation; the simulation of up to 10 million wavelengths involves
solution of linear systems with 2 billion degrees-of-freedom andelements of order 8. The course was attended by PhD students
from Poznań University of Technology and partner universities
from Germany. l
15 iacm expressions 51/22

UKACM 2022 Conference
he 2021 conference took place on 20th-22nd of April 2022. Organised by
Dr Jelena Ninic, Dr Matteo Icardi, Dr Kristoffer Van Der Zee and Dr Fangying
Wang (University of Nottingham), the conference followed an in-person format, with
84 participants delivering talks.

T

UKACM School
As it is tradition in UKACM, a School was organised before the start of theconference. This year the following topics were covered in the UKACM School:• Computational Phase-field Modelling. (Dr Kris van der Zee,
University of Nottingham)• Cut Finite Element Methods (Prof Dominik Schillinger,
Technische Universität Darmstadt, Germany)• Optimisation Using Metaheuristics (Prof Ender Özcan, University of Nottingham)
UKACM Plenary Speakers
Four plenary lectures at the conference were delivered by the following distinguishedresearchers:
René de Borst, University of Sheffield, UK
Fracture and fluid flow in porous media: A multiscale approach and isogeometric discretisation

Dominik Schillinger, Technische Universität Darmstadt, Germany
Thermodynamically consistent concurrent material and structure optimization ofelastoplastic multiphase hierarchical systems

Stefanie Elgeti, TU Wien, Austria
Numerical Design of Engineering Components and their Production Processes

Emilio Martínez-Pañeda, Imperial College London, UK
Phase field modelling of fracture and multi-physics material degradation phenomena

In addition, Dr Robert Bird delivered the closing lecture, entitled “On the highly
accurate computation of crack paths using the hp-adaptive finite element method”,
as winner of the 2021 Roger Owen PhD Thesis Award.
UKACM Conference Awards
The following delegates received the three UKACM conference awards:• Arnaud Vadeboncoeur from University of Cambridge received the Mike Crisfield
Prize for the paper “Efficient sampling through active learning projectedsurrogates: ALPS-SVG”.
• James D. Elgy from Keele University received the prize to the best presentation
by a post-doctoral researcher for the paper “Computation of the magnetic
polarizability tensor for dictionaries of objects with varying materials”.
• Manuela Cabrera from the University of Nottingham received the prize to thebest presentation by a PhD student for the paper “Machine learning-based
fusion of experimental and synthetic data for reliable prediction of steel
connection stiffness”.
iacm expressions 51/22 16

for all inclusions under UKACM please contact
Rubén Sevillar.sevilla@swansea.ac.uk
UKACM 2022 special issue in Engineering with Computers
Attendees to the 2022 UKACM conference have been invited tosubmit a paper to a special issue in Engineering with Computers
entitled “Advanced in Computational Mechanics”.
The issue is expected to be published in 2023.

2022 Roger Owen PhD Thesis Award
The winner of the 2022 Roger Owen PhD Thesis Award was Dr Jinlong Fu.

UKACM 2023 Conference
The 2022 UKACM conference will be organised by Dr Mohaddeseh Mousavi Nezhad,
from the University of Warwick. The Conference and School will take place between
19th-21st of April 2023.
This conference will also mark the end of the 30th Anniversary of UKACM.

Agreement with River Publishers
UKACM has recently signed an agreement with the European Journal ofComputational Mechanics, owned by River Publishers.
The agreement, signed during the 30th Anniversary of both
UKACM and the European Journal of Computational
Mechanics, will provide free access to the journal to UKACM
members and a sponsorship for all the UKACM conference
awards.
UKACM would like to take this opportunity to encourage
submissions to the European Journal of Computational
Mechanics and the organisation of special issues in
relevant topics. l
17 iacm expressions 51/22

USACM Thematic Conference on Uncertainty
Quantification for Machine Learning Integrated Physics
Modeling (UQ-MLIP)
he USACM Technical Thrust Area (TTA) on Uncertainty Quantification and
Probabilistic Modeling organized an in-person thematic conference on UQ for
Machine Learning Integrated Physics Modeling (UQ-MLIP) on August 18-19, 2022,
in Crystal City, Arlington, Virginia. Machine Learning, and in particular neural network-based methods, are being increasingly embedded in modeling and simulation
methods of complex physical systems – starting from the observation/data collection
to the formulation and evaluation of different scales/levels of modeling and finallyprediction. While uncertainty quantification methods for “classical” modeling andsolution methods are now well understood, though often still intractable, methods
for UQ of ML integrated models are crucial but pose many new challenges!

T

Figure 1:
Technical session
at UQ-MLIP

The conference program attracted several excellent speakers and posters.
Keynote speakers brought up key challenges and presented some innovativeideas. An early career panel with panelists from several federal science agencies
was well received as it engaged early career scientists in the audience. Successful
early/mid-career scientists brought up challenges they have been faced with andstrategies they have used to navigate them. A panel on open research challenges
and opportunities at the end of the meeting brought up
new ideas for future efforts of the community.
The meeting was partially supported by the National
Science Foundation and Sandia National Laboratories.
Funds were used to support travel expenses of students
and early career scientists. We thank the 95 participants
for their time and effort, the NSF and Sandia National
Laboratories for their financial support, and gratefully
acknowledge the involvement of program managers
A. Sussman (CISE/OAC) and S. Qidwai (ENG/MOM) at
the NSF, S. Lee at the DOE, and F. Fahroo at the AFOSR.
Further information about the event may be found athttps://sites.google.com/usacm.org/uq-mlip/home.

USACM Thematic Conference on Meshfree andNovel Finite Element Methods with Applications (MFEM)
he USACM Novel Methods in Computational Engineering and Sciences TTA,
with support from Ansys, Oak Ridge National Laboratory, K&C, Sandia National
Laboratories, Moldex3D and JSOL hosted an in-person conference on Meshfree
and Novel Finite Element Methods with Applications in Berkeley, California
September 25-27, 2022 to focus on the post-pandemic academia-industry
engagement, industrial trends and challenging applications.

T

Organized by Drs. C. T. Wu, Zhen Chen, C. Armando Duarte, Sanjay Govindjee,
Jacob Koester and Shaofan Li, the conference brought together over 100
participants in academia and industry from the US, Europe and Asia to develop a
two-way engagement that is about the people who can engage to create and utilize
the Computational Mechanics technology to meet the industry’s needs, follow theindustrial trends, and focus on emergent industrial applications. Through eighty-four
technical presentations in twelve minisymposia as well as four plenary lecturesand four semi-plenary lectures, the participants were able to engage to identify
challenges and barriers in industrial applications, and showcase ideas, resources,
and success stories. Further information about the event may be found at
http://mfem2020.usacm.org.
iacm expressions 51/22 18

for all inclusions under USACM please contact
admin@usacm.org

10th International Conference on Isogeometric Analysis
he 10th International Conference on Isogeometric Analysis was held November
6-9 in Banff, Alberta, Canada at the world famous Banff Spring Fairmont hotel.
With over 130 in attendance and organized by the USACM Technical Thrust Area on
Isogeometric Analysis and with sponsorship from Coreform, the conference featured
four plenary speakers and two semi-plenary speakers as well as an industry panel.
There were 11 minisymposia covering the following topics: IGA for Biomedical
Applications, Industrial Applications for IGA, Unstructured Spline Technologies.
Adaptive Spline Technologies, IGA for Fluids and FSI, IGA for Solids and Structures,
Mathematical Foundation of IGA, Fast Formationand Solution Techniques, Design Space Exploration,
Optimization and Uncertainty Quantification, New
Frontiers in IGA, and Isogeometric Boundary
Element Methods.

T

Figure 2:
A. Korobenko,
M-C. Hsu & J. Evans

Organized by Professors Artem Korobenko (Universityof Calgary), Ming-Chen Hsu (Iowa State University)
and John Evans (University of Colorado, Boulder), theconference was the first IGA conference to be held in
Canada and the first in-person conference since the2019. Participants enjoyed not only the talks, but freetime for informal discussions with colleagues.
More information may be found on the website at
http://iga2022.usacm.org.

TTA Virtual Seminars
everal TTAs of the USACM have been holding monthly virtual seminars which have featured guest speakers anddiscussions on various topics of importance to their field. Videos of the talks may be found at usacm.org/ttas
under the TTA of interest. The following talks have taken place this summer/fall:S

TTA on Computational Fluid Dynamics and Fluid Structure Interaction
Kenji Takizawa (Waseda University), Space–Time Isogeometric Analysis of Heart Valves
TTA on Large Scale Structural Systems and Optimal Design
Brendan Keith (Brown University), Adaptive Sampling for Constrained Optimization under Uncertainty
Hayoung Chung (Ulsan National Institute of Science and Technology), Understanding Multifunctional
Behaviors using Sequential Multiscale Approaches
Xingsheng Sun (University of Kentucky), Rigorous Multiscale Quantification of Material Uncertainties
TTA on Nanotechnology and Lower Scale Phenomena
Alejandro Strachan (Purdue University), Enhancing Physics-Based Modeling and Extracting PhysicalInsight from Data Using Machine Learning
Markus Hütter (Eindhoven University of Technology), Molecular Approach to Plasticity in Polymer Glasses:
A Journey
Michael Falk (Johns Hopkins University), Questing for Structural Predictors of Plastic and Failure
Response in Glasses
Michael Shields (Johns Hopkins University), The Intersection of Machine Learning & Uncertainty
Quantification in Physics-Based Modeling for Materials Systems
Steve WaiChing Sun (Columbia University), Geometric Learning for Discovering Complex Material
Behaviors of Microstructures
Stefanie Reese (RWTH Aachen University), Data-Driven Mechanics for Elastic and Inelastic Problems
Including Uncertainty Quantification l

USACM Upcoming Eventsm

17th U.S. National Congress on Computational Mechanics
July 23-27, 2023, Albuquerque, New Mexico (17.usnccm.org)
Information on other upcoming conferences may be found at www.usacm.org/conferences. l
19 iacm expressions 51/22

9 th GACM Colloquium on Computational Mechanics
for Young Scientists from Academia and Industry
he successful 9th GACM Colloquium on Computational Mechanics for Young
Scientists from Academia and Industry took place with 279 participants from 20
countries from September 21 to 23, 2022, in Essen, Germany!

T

Follow GACM

After the motivating opening by GACM President Marek Behr and the kind welcome to
the University Duisburg-Essen by Vice-Rector Jörg Schröder, all participants could follow
the first scientific talk on Wednesday. Exciting plenary lectures were given by Swantje
Bargmann on “Core-Sshell Metamaterials Based on Triply Periodic Minimal Surfaces”
and Otto von Estorff on “Computational Methods in Acoustics: Challenges in Theory
and Practice.” Each plenary talk was followed by impressive presentations of the winnersof the Best Ph.D. Award 2019, first Tobias Kaiser on “Computational Modelling of
Non-Ssimple and Anisotropic Materials,” followed by Bettina Römer on “ConsistentHigher Order Accurate Time Discretization Methods for Inelastic Material Models.”
The two contributed sessions with eight tracks in the afternoon already showed an active
and innovative community with numerous talents.
The second day started with a fascinating plenary lecture by Karl Steeger of CPI Vertex
Antennentechnik on "How Numerical Methods Support the Development of Antennas."
After his talk, the winner of the GACM Best Ph.D. Award 2020, Maximilian Grill presented
his remarkable work on "Computational Models and Methods for Molecular Interactions ofDeformable Fibers in Complex Biophysical Systems." The morning was closed by anotherexciting plenary lecture on "Multiscale Modeling Of Materials With Microstructure -- From
Smart And Soft To Light And Stiff" by Marc-André Keip. In the afternoon, very lively
discussions were held during the poster session. The scientific part of the day was again
concluded by a contributed session, with many talks covering the whole spectrum ofComputational Mechanics.
After enjoying a delicious dinner in a great atmosphere on Thursday evening, thescientific program on Friday was again very inspiring. The day started with a seven-trackcontributed session before Laura De Lorenzis gave the final plenary talk on "EUCLID:
Efficient Unsupervised Constitutive Law Identification and Discovery." Like all previous
plenaries, this one was very impressive. After lunch, the winner of the Best Ph.D. Award
2021, Tobias Bode gave an outstanding talk on "Peridynamic Galerkin Methods For
Nonlinear Solid Mechanics." The research program was concluded with a final contributed
session with five tracks in the afternoon. During the closing session, Marek Behrsummarized the event's success along with some statistics and announced that the10th GACM Colloquium, celebrating the 30th anniversary of the German Association for
Computational Mechanics, will take place from September 11 to 13, 2023, in Vienna!

iacm expressions 51/22 20

for all inclusions under gacm please contact:
Norbert Hosters
gacm@gacm.de
We want to take this opportunity to thank everyone involved in the conference. First,
thanks to everyone who contributed to this conference by organizing a mini-symposium,
giving a talk, or creating a poster! This is the only way a conference can ever be a
success. Then we would like to thank the countless people working behind the scenes
including student and administrative assistants. Without your work, such a conference
cannot be held. Finally, special thanks to the event organizers: Dominik Brands,
Hauke Gravenkamp, Richard Ostwald, Lisa Scheunemann, Alexander Schwarz, andCarina Schwarz. This has been a fantastic conference in a professional environment
with a pleasant atmosphere! l

GACM Best Ph.D. Award 2021
e are pleased to announce that the outstanding doctoral thesis of Tobias
Bode was honored with the GACM Best Ph.D. Award 2021. His thesis,"Peridynamic Galerkin Methods for Nonlinear Solid Mechanics," was conducted
at Leibniz Universität Hannover and has been performed under the academic
supervision of Prof. Peter Wriggers.

W

Large deformations occur in additive manufacturing and many other engineering
processes - such as forming or machining. These finite deformations lead toconsiderable mesh distortions in classical finite element methods, such thatcomputationally expensive adaptive methods have been developed to obtainmeaningful predictions with FEM of the process sequences. To reduce thecomplexity of FEM, new mesh-free methods have been increasingly developed in recent
years, which allow the calculation of large deformations without the need to adjust meshes
adaptively. One promising method is based on peridynamics, which uses an alternative
approach to describe the partial differential equations of solid mechanics. The combinationof particle discretizations and the so-called peridynamic correspondence principle provides
a mesh-free simulation method, which is flexible but not robust in its original form.
This was the starting point of the work of Mr. Bode.
He has improved the peridynamic correspondence
formulation utilizing a Galerkin method, which provides
new conditions for the choice of the shape functions
and the application of the Dirichlet and Neumannboundary conditions. This method allows forstabilizations and enrichments, similar to those of thefinite element method, to improve performance, thus
enabling the calculation of complex forming processes.
The applicability of peridynamics to real engineering
problems is verified in the thesis by computing a seriesof challenging test examples. Thus, Tobias Bode hasdeveloped a new numerical method for engineering
applications with finite deformations. In doing so, hedeveloped a stable and efficient variant of the generalperidynamic mesh-free discretization method.
Mr. Bode contributed the thesis to both the theoreticaland algorithmic formulations. Here, he had tobreak new ground and thus made significant
contributions of his own, which have alreadybeen recognized in the scientific community andfound their way into several publications in prestigious
journals. This was possible because the methodology
is new and has been considered in this form for the
first time in an international context. l

21 iacm expressions 51/22

Gruppo Italiano di
Meccanica Computazionale

GIMC SIMAI YOUNG WORKSHOP
Pavia, 29-30 September 2022

he AIMETA Computational Mechanics Group (GIMC) is pleased to announce thatthe workshop had a great success:T

Senior Plenary Lecturer•
Antonia Larese, University of Padua (ITALY)•
Giancarlo Sangalli, University of Pavia (ITALY)
Young Plenary Lecturers• Francesco Regazzoni (SIMAI)• Lorenzo Tentarelli (SIMAI)• Alessia Patton (GIMC)• Giulia Bertaglia (GIMC)
Thematic Minisymposia
19 minisymposia spanning a wide range of topics in appliedmathematics and computational mechanics. l

iacm expressions 51/22 22

for all inclusions under GIMC please contact
Sonia Marfia
sonia.marfia@uniroma3.it

MINISYMPOSIUM GIMC
(Italian Group of Computational Mechanics)
at the AIMETA Congress, Palermo, 4-9 September 2022

he AIMETA Computational Mechanics Group (GIMC) is pleased to announce thatthe minisymposium GIMC was very successful and had a large turnout:T

41 presentations and more than 80 participants, from Italian and foreign
Universities. l

GIMC GMA GBMA 2023
Reggio Calabria, 12-14 July 2023

he joint Conference of the AIMETA Groups GIMC (Computational Mechanics
Group), GMA (Mechanics of Materials Group) and GBMA (Biomechanics Group)
will be held at the Università Mediterranea di Reggio Calabria, during July 12-14,
2023.

T

The abstract submission deadline is April 1, 2023.
Further information is available at http://www.gimc-gma-gbma-2023.unirc.it/l
23 iacm expressions 51/22

for all inclusions under CEACM
please contact
Jurica Sorić
jurica.soric@fsb.hr

10th International Congress of the
Croatian Society of Mechanics
10th ICCSM
he Croatian Society of Mechanics is an association with the objective of promoting
education, research and application in the field of fluid and solid mechanics. Within
the framework of this Society, scientific gatherings have been organised in order tomake an environment for the exchange of new ideas and achievements in mechanicalsciences. The 10th International Congress of the Croatian Society of Mechanics(10th ICCSM) was held on September 28-30 in Pula, the city of the Istrian peninsula,and one of the Croatia’s most popular tourist destination. The congress was co-organised by the Central European Association for Computational Mechanics (CEACM), under
the auspices of the Croatian Academy of Sciences and Arts. The General Chairs of thecongress were Zdenko Tonković, President of the Croatian Society of Mechanics (CSM)
and Jurica Sorić, member of the Executive Committee of CSM and former CEACM
President. The International Scientific Committee was composed of 57 prominent
researches from 14 different countries.

T

Figure 1:
Awarding Ceremonyof the CEACM Awards.
From left to right:
Adnan Ibrahimbegović(CEACM President),
Zdenko Tonković(member of CEACM
Scientific Board),
Janos Logo
(CEACM Vice-President)& Bernhard Pichler(CEACM Past-President)More than 150 participants from 16 countries took part in this scientific event. Four
plenary and 137 regular lectures were presented. The plenary lecturers were Ferdinando
Auricchio (University of Pavia), Laura De Lorenzis (ETH Zuerich), Marc Geers(Eindhoven University of Technology) and Joerg Schroeder (University Duisburg-Essen).
There were four organised sessions dealing with current research topics in mechanicalsciences. A special session entitled “Advanced Numerical Methods in
Structural Analysis: Recent Developments and Future Challenges” wasorganised by the CEACM in honour of Professor Sorić on the occasionof his retirement, as recognition for his scientific contribution in the fieldof numerical mechanics, especially for his longtime activities in the
CEACM. On behalf of the CEACM, the session co-organisers were
Adnan Imbrahimbegovic, current CEACM President; Bernhard Pichler,
Past-President and Zdenko Tonković, member of the CEACM Board.
The extended abstracts of all the presentations were published in theBook of Abstracts.
During the congress dinner, the awarding ceremony of CEACM awards, conducted by
Adnan Ibrahimbegović, took place. This year two CEACM awards were initiated tohonour outstanding researchers in the field of computational mechanics: the CEACM
Prof. Mang Award for senior scientists and the CEACM Best Thesis Award for young
researchers. The laureates are Adnan Ibrahimbegović and Vladimir Kompiš for the
CEACM Prof. Mang Award and Henrik T. Sykora for the CEACM Best Thesis Award.

Figure 2:
Participants at the10th ICCSM
after Closing Ceremony

iacm expressions 51/22 24

After the dense days of fruitful scientific gathering, the congress participants enjoyed local
hospitality, food, culture, and sight-seeing in the beautiful city of Pula. More details on
the congress can be found at the website http://www.iccsm2022.fsb.hr. l

SOCIEDAD CHILENA DE MECÁNICA COMPUTACIONAL

for all inclusions under SCMC please contact
Marcela Cruchaga &Jorge Hinojosa
scmc.correo@gmail.com

he Chilean Society of Computational Mechanics (SCMC) established in 1995, is theentity that brings together researchers and engineers in the area of computational
mechanics in Chile.

T

Since 2003, the SCMC, together with several Chilean Universities as hosts, organizes
the Conference on Computational Mechanics (JMC), the main workshop/conference on
the application and development of numerical methods for calculation and design inengineering and applied sciences in Chile.
During the year 2020, due to the pandemic, JMC was not held, but works were disseminated through videos carried out by Chilean students and their tutors, which wereshared on social networks.
During 2021, also in a pandemic situation, the JMC was held virtually, organized by the
Universidad Técnica Federico Santa Maria de Chile, where more than 100 papers were
presented.
In the year 2022, the MC2022 was the 20th version of the Computational Mechanics
Conference and was organized by the Austral University of Chile 100% in person, on
October 6 and 7 in the city of Valdivia https://jmc2022 .web.app/, with the participation ofnational and international undergraduate and postgraduate students and researchers
and with the sponsorship of important companies in the area of computer simulation andproviders of computer equipment such as ESSS and SIASA. Invited presentation weremade by Professor Jean-Philippe Ponthot from University of Liege, Belgium, Professor
Cristián Escauriaza from Pontificia Universidad Católica de Chile and Professor Franco
Perazzo from Universidad Técnica Federico Santa Maria de Chile.

Figure 1:
Prof. Jean-Philippe Ponthot
University of Liege (Belgium)

Figure 2:
Prof. Cristián Escauriaza
Pontificia Universidad
Católica de Chile

Figure 3:
Prof. Franco Perazzo
Universidad Técnica
Federico Santa Mariade Chile

he next Conference on Computational Mechanics XXI will
be organized in the city of Santiago, by the Metropolitan
Technological University on October 5 and 6, 2023, for more
information contact jmc2023@utem.cl.

T

We cordially invite you to participate and spread this invitation. l
25 iacm expressions 51/22

n 1997, a visionary group of researchers and faculty members of several Brazilian
universities decided to establish an association to foster the Computational
Mechanics area in Brazil. It was September 15th, in a meeting held at LNCC
(National Laboratory of Scientific Computation) in Rio de Janeiro. That was thefoundation stone of ABMEC, the Brazilian Association for Computational Methods
in Engineering. In 2022, ABMEC celebrates its 25th
anniversary, with a modern webpage (www.abmec.org.br),promoting a very traditional and successful conference, the
XLIII CILAMCE, in a fully face-to-face format, and renewedby the election of a new director board and half of its
executive council.

I

The most important event promoted by ABMEC is the
Ibero-Latin American Congress on Computational Methods
in Engineering, CILAMCE. In 2020, the mini-symposia call
was closing when WHO declared the COVID pandemic.
The first option was to cancel CILAMCE. Despite all theuncertainties ahead, we took the support of the Brazilian
Computation Methods community for granted, and CILAMCE
was redesigned for a virtual format.
Figure 1:
XLIII CILAMCE

Thanks to the efforts of the organizing committee chaired by
Prof. Aref Kazan (chairman) and Prof. André Torii (co-chairman) from UNILA(Federal University of the Latin-American Integration), the XLI CILAMCE becamea huge success. The following year, we had an even more impressive challenge,organizing with IACM, the third edition of PANACM jointly with the XLII CILAMCE.
The format was still virtual, but astudio based in Rio de Janeiro wasused to broadcast the live
participation of the plenary speakers.
Prof. Alvaro Coutinho (chairman)from UFRJ (Federal University of Riode Janeiro), Prof. Eduardo Campello(co-chairman) from USP (Universityof Sao Paulo) and Prof. Sandra Malta(co-chairwoman) from LNCC wereable to organize a successful eventwith a large number of pre-recorded
talks, mini-symposia, and participantsfrom Brazil and outside.

Figure 2:
Iguasu Falls

This year, from November 21 to 25, ina fully face-to-face format, the XLIII CILAMCE was held in Foz do Iguaçu. This city,where Brazil borders Argentina and Paraguay, is the gateway to Iguazu Falls, one of
the New Seven Natural Wonders of the World. After two long years, the Brazilian
community of Computational Methods was able to meet in person, making this conference unforgettable. The success of the event can be illustrated by the 413
approved complete papers, 37 mini-symposia, and 392 participants from Brazil, Latin
America, North America, and Europe. Prof. Andre Torii (chairman) from UNILA andProf. Marco Argenta (co-chairman) from UFPR (Federal University of Paraná) worked
tirelessly to provide a remarkable and full of novelties conference. One of them wasa mini-symposium conceived to present the practical application of Computational
Methods for students from the high schools of Foz do Iguaçu.
It was a fantastic experience for the young students to be in contact with theresearch of some of our senior delegates. CILAMCE participants were presented

iacm expressions 51/22 26

for all inclusions under ABMEC please contact
Felício Bruzzi Barros
feliciobbarros@gmail.com

with five high-level plenary lectures, given by Prof. Junuthula N. Reddy from
Texas A&M University, Prof. Emílio C. N. Silva from the University of São Paulo,Prof. Bruno Sudret from ETH Zürich, Prof. Silvana M. B. A. da Silva from theFederal University of Pernambuco
Figure 3:
and Prof. Peter Wriggers from Leibniz
Prof.
Marco
Argenta(co-chairman)
&
Prof.
Andrè
Torri
(chairman)
University at Hannover. Closing theconference, all participants gather towatch Brazil's victory over Serbia in
the World Cup.
The year 2022 will be marked not
only due to the new beginning of aface-to-face CILAMCE. Also,
important changes were stablished by
the election of the director board andhalf of the executive council. For the
first time, our association will haveas a president a woman, Prof. Suzana
Avila from UnB (University of Brasilia).
This remarkable fact and the electionof another woman, Prof. Silvana Silva
from the UFPE (Federal University of
Pernambuco), for the executive
council highlight the increasing
contribution of women to Computation
Methods in Brazil.

Figure 4:
CILAMCE participants celebrating the first goalof the Brazilian Team in the World Cup

As the Christmas holidays approach,
we would like to announce the
XLIV CILAMCE that will be held in
Porto City, Portugal, from
November 13 to 16. Our hosts will
be FEUP (Faculty of Engineering of
the University of Porto) and ISEP
(Superior Institute of Engineering of
Porto). Then, have you all a Merry
Christmas, and welcome to join us
at Porto City for the upcoming
XLIV CILAMCE 2023. lWarmest regards
Prof. Felício Bruzzi Barros
ABMEC President(Federal University of Minas Gerais)

Figure 5:
Porto City
27 iacm expressions 51/22

Report fromthe Japan Association for Computational Mechanics
he Japan Association for Computational Mechanics (JACM) is a union ofresearchers and engineers working in the field of computational mechanics
mainly in Japan. The JACM is a loosely coupled umbrella organization covering
29 computational mechanics related societies in Japanthrough communication with e-mail and web page(https://ja-cm.org/index-e.html). The number of individual
members is about 330. JACM members actively participate in
the IACM activities.

T

Figure 1:
Professor Hiroshi Okada, President of JACM,
reporting about the recent activities of JACM

Figure 2:
Recipients of the 2022 JACM Computational
Mechanics Award, (a) Prof. Tomonari Furukawa (Uni.
of Virginia) (b) Prof. Seiya Hagihara (Saga Uni.) &(c) Prof. Nobuyuki Oshima (Hokkaido Uni.)

Figure 3:
Recipients of the 2022 JACM Fellows Award,(a) Prof. Masao Ogino (Daido Uni.),(b) Prof. Professor Akihiro Takezawa (Waseda Uni.) &(c) Prof. Satoyuki Tanaka (Hiroshima Uni.)

Figure 4:
Recipients of JACM Young Investigators Award,(a) Prof. Yusuke Kuwata (Osaka Metropolitan Uni.),(b) Prof. Hiroya Mamori (The Uni. ofElectro-Communications) &(c) Prof. Tomohiro Otani (Osaka Uni.)
iacm expressions 51/22 28

On September 17, 2022, the 2022 JACM annual meeting andaward ceremony were held in Morito Memorial Hall of Tokyo
University of Science in Tokyo. The annual meeting cerebrated
the 20th anniversary of JACM. JACM was established on
December 17, 2002. The main function of JACM has
unchanged over the years. That is the bridge between
researchers/engineers in the field of Computational Mechanics inJapan and the activities of IACM. The meeting was also broadcasted by Zoom to remote participants (Figure 1).

In this year, JACM inducted eight new honorary members.
Before the award ceremony, new honorary members wereintroduced. They have distinguished records of researches
and services to computational mechanics related professionalsocieties. The new honorary members are:Professor Nobutada Ohno (Professor Emeritus, Nagoya
University and Nagoya Industrial Science Research Institute),
Professor Kikuo Kishimoto (Professor Emeritus, Tokyo
Institute of Technology and New Energy and Industrial
Technology Development Organization),
Professor Michihisa Tsutahara (Professor Emeritus,
Kobe University),
Professor Kazuhiro Nakahashi (Professor Emeritus,
Tohoku University),
Professor Toshiaki Hisada (Professor Emeritus,
The University of Tokyo, UT-Heart Inc),
Professor Kozo Fujii (Tokyo University of Science),
Professor Yoichiro Matsumoto (Professor Emeritus,
The University of Tokyo) andProfessor Takami Yamaguchi (Professor Emeritus,
Tohoku University).
Each of new honorary members gave a short speech,
after their introductions.

Following the introduction of the new honorary members, theaward ceremony took place. There are three categories of
JACM Awards. They are the JACM Computational Mechanics
Award which is the highest award, JACM Fellows Award and the
JACM Young Investigator Award.
Professor Tomonari Furukawa (University of Virginia),
Professor Seiya Hagihara (Saga University) and Professor

For all inclusions under JACM news please contact:
Hiroshi Okada jim@ja-cm.org

Nobuyuki Oshima (Hokkaido University) were awarded 2022 the JACM
Computational Mechanics Award (Figure 2).
The recipients of the JACM Fellows Award were Professor Masao Ogino (Daido
University), Professor Professor Akihiro Takezawa (Waseda University) andProfessor Satoyuki Tanaka (Hiroshima University) (Figure 3).
The winners of JACM Young Investigator Award were Professor
Yusuke Kuwata (Osaka Metropolitan University), Professor
Hiroya Mamori (The University of Electro-Communications) andProfessor Tomohiro Otani(Osaka University) (Figure 4).

The second part of the annual meeting, Professors
Shinobu Yoshimura, the former president of JACM and
Shu Takagi, recipient of 2021 JACM Computational Mechanics
Award, delivered special lectures for the occasion of the20th anniversary of JACM (Figure 5).

Professor Yoshimura talked about the history of JACM.
It included activities among the Japanese researchers
just before JACM was established in 2002. Professor
Genki Yagawa, Professor Emeritus the University of Tokyoand Toyo University, took the leading role. Then,
JACM became almost its present form in two year.
After 2005, JACM slowly evolved and grew over the years.
Professor Yoshimura showed memorable photographs fromthe past JACM meetings.

Figure 5: above & below(above) Prof. Shinobu Yoshimura (The Uni. of Tokyo)& (below) Prof. Shu Takagi (The Uni. of Tokyo)
delivering their talks

Professor Shu Takagi of the University of Tokyo presented his
work on computational fluid dynamics analysis on free-surface
flow problems. We all enjoyed his presentation.
At the end of the 2022 JACM meeting, we took a group photo (Figure 6). lFigure 6:
Group Photo (All the participants)

29 iacm expressions 51/22

MECOM 2022
XXXVIII Argentine Congress on Computational Mechanics
Bahía Blanca, Buenos Aires, Argentina
he XXXVIII Argentine Congress on Computational Mechanics (MECOM 2022)
took place from November 1st through November 4th, 2022, in the city of
Bahía Blanca, Buenos Aires, Argentina. This new edition of the annual AMCA
Congresses was organized by the Applied Multiphysics Research Group (GIMAP),
dependent on the Bahía Blanca Regional Faculty of National Technological University(UTN) and the National University of the South (UNS), together with the Argentine
Association for Computational Mechanics (AMCA).

TThe Organizing Committee included Prof. Sebastián P. Machado (Chairman),Prof. Franco E. Dotti (Co-Chairmen), Prof. Carlos Vera, Dr. Santiago M. Osinaga
and Dr. José Ramírez. The Scientific Committee was chaired by Prof. Mariano Febbo
with Prof. Martín Saravia as Co-Chairmen.
Figure 1:
Opening Ceremony, fromleft to right:
Prof. Sebastián Machado(chair of the congress),
Prof. Mariano Febbo(scientific Committee),Prof. Daniel Vega (rectorof UNS), Ana Scarabino(vocal of AMCA) &Alejandro Staffa(dean of UTN-FRBB)

Figure 2:
All conference participantsat the UNS main entrance

iacm expressions 51/22 30

The Congress hosted seven Invited Lecturers, Prof. Marcelo Savi (Departmentof Mechanical Engineering in Universidad Federal de Rio de Janeiro, Brasil),Prof. Rainald Löhner (George Mason University, USA), Prof. Tim Colonius (California
Institute of Technology -Caltech, USA), Prof. Alper Erturk (Georgia Institute ofTechnology, USA), Prof. Elbio Palma (National University of the South, Argentina),
Prof. Marian Wiercigroch (Aberdeen University, UK), Dr. Ricardo Lebenshon (Alamos
National Laboratory’s Theoretical Division, USA). Also, four Keynote Lectures weredelivered by Prof. Marta Rosales (National University of the South, Argentina),
Prof. Tomasz Kapitaniak (Technical University of Lodz, Poland), Adrian Lew (Stanford
University, USA) and Prof. Ekaterina Pavlovskaia (Aberdeen University, UK).
Full-length papers were submitted to a peer review process prior to publication.
Accepted papers have been published in the proceedings series “Mecánica
Computacional”, which are openly available at the following website:for all inclusions under AMCA please contact:
Pablo A. Kler
kler@cimec.unl.edu.ar
http://www.amcaonline.org.ar/mcamca. The Conference consisted of 20 TechnicalSessions with more than 220 papers presented.
A special session was devoted to undergraduate students, with awards for bestposters, that were granted to:
1. Delfina Criado, from the Applied Multiphysics Research Group (GIMAP)of the National Technological University at Bahia Blanca, Argentina.
2. José Fernández Palmieri from the Applied Multiphysics Research Group(GIMAP) of the National Technological University at Bahia Blanca, Argentina.
3. Lucas Donnet y Martín Zanatta, from National Technological University (UTN)
at Santa Fe, Argentina.
The Congress also included other activities like the X Meeting of OpenFOAM users,a short course about Piezoelectric energy harvesting by Alper Erturk and the special
session to honor Prof. Marta Rosales and Diana Bambill for their retirement.

Figure 3:
Prof. Sergio
Idelsohn receiving
the AMCA Award
from Prof. Victor
Fachinotti

Figure 4:
Welcome cocktail

Figure 5:
Participants of the Congress during of a conference

Call for Papers
The Argentine Association for Computational Mechanics (AMCA)
announces the XXXIX Argentine Congress on Computational
Mechanics, and the first Argentine – Uruguay Congress on
Computational Mechanics (MECOM 2023) to be held in
Concordia, Argentina, and Salto, Uruguay, organized byFacultad Regional Concordia (FRCon), of the Universidad
Tecnológica Nacional (UTN), Centro Universitario Regional
Litoral Norte (CENUR LN), of the Universidad de la República,
Uruguay, and AMCA.
https://amcaonline.org.ar/mecom2023/
31 iacm expressions 51/22

for all inclusions under KSCM please contact
KSCM office
Kscm.society@gmail.com

KSCM 2022
2022 KSCM Conference
on Computational Mechanics
he 2022 Annual KSCM Conference was held for 3 days in the Yongpyong
Resort, 210 km east of Seoul, Gangwon-do, Korea, from 22 to 24 June, 2022.
The conference organized by the Korean Society for Computational Mechanics
aims to bring together Korean researchers and foreign graduate students in the fieldof computational mechanics and to encourage research exchange and networking.
72 professors and students registered and listened to research on the latest research
topics on computational mechanics.

T
Figure 1:
The photo of all participants
for the 2022 conference

Figure 2:
The commemorative photoof all participants’ dinnerIn the conference, the academic awards ceremony was also held and three types ofawards and rewards were given to six professors. Yoon Young Kim (Seoul National
University) received the KSCM Medal Award; Sungsoo Na (Korea University), SangJoon Shin (Seoul National University), and Jungwook Hong (KAIST) received KSCM
Academic Award; Do-Nyun Kim (Seoul National University) and Jae Wook Kim (Seoul
National University) won the Young Investigator Award. In addition, 3 graduate students (Mr. Park, Song, and Kim) received the Outstanding Poster Award.

Further information will be found at: http://www.kscm-society.org/.

2022 KSCM Year-end Workshop
on Computational Mechanics
The 2022 KSCM Year-end Workshop will be held at the Sofitel Ambassador Hotelon December 29, 2022, Seoul, Korea. Three famous speakers from world classcompanies and university in Korea will give lectures on the latest technology trend. l
iacm expressions 51/22 32

for all inclusions under APMTAC please contact
José César de Sá
cesarsa@fe.up.pt
Portuguese Association ofTheoretical, Applied &Computational Mechanics

PMTAC, the Portuguese Association of Theoretical, Applied and Computational
Mechanics and SEMNI, the Spanish Society of Computational Mechanics andComputational Engineering, had their joint Congress on Numerical Methods,
CMN 2022, that took place in Las Palmas de Gran Canaria in Spain, in 12-14
September 2022. It was the eleventh congress of this series, which is celebrated
every two years by the two societies since 2002, and where members of the twosocieties present and discuss their more recent research work. During thecongress there was a special session in honour of Prof. Manuel Casteleiro, former
president of SEMNI who has passed away recently. Manuel Casteleiro has been,
for more than two decades, one of the promoters of the close relations between thetwo societies. On the occasion the organizers of the conference promoted a fruitful
discussion on the future of Computational Mechanics, surely a fine way to honour
his memory by not only remembering his scientific legacy, but also by looking at the
future he helped to carve. The next common conference of the two societies will
be held in September 2024 in Aveiro, Portugal.

A

Figure 1:
Session honouring
Manuel Casteleiro:“A look into the future ofComputational Mechanics”
Some forthcoming international congresses in Portugalm

APMTAC is the main organizer of the next ECCOMAS CONGRESS 2024,
https://eccomas2024.org/, the 9th European Congress on Computational
Methods in Applied Sciences and Engineering. The main motivation of
APMTAC is to contribute to promote joint efforts of European Universities,
Research Institutes and Industries which are active in the broader field of
Numerical Methods and Computer Simulations in Engineering and Applied
Sciences, but also to attract researchers from all over the world to this great
event that will take place on 3-7 June 2024, in Lisbon, Portugal.

m

The 7th ECCOMAS Young Investigators Conference (YIC2023),
https://yic2023.fe.up.pt/, will be held at the Faculty of Engineering of the
University of Porto (FEUP), Portugal, 19-21 June 2023. APMTAC supports thisconference which organizing committee is composed of young researchers from
the Mechanical and Civil Engineering Departments of FEUP, and INEGI, theInstitute of Science and Innovation in Mechanical and Industrial Engineering. l
33 iacm expressions 51/22

Spanish-Portuguese Congresson Numerical Methods
held in Las Palmas de Gran Canaria last September
nce the pandemic has been overcome, the Spanish and Portuguese societies ofComputational Mechanics, SEMNI and APMTAC, have held their joint conference
in a magnificent venue: Las Palmas de Gran Canaria, in the Canary Islands. The
conference was held at the Alfredo Kraus conference centre of the city, with almost
200 participants.

O

Karen Willcox opened the conference with a brilliant plenary conference on reducedorder models, digital twins and predictive science. Also plenary lecturers were profs.
Antonio Huerta, Renato Natal, Carlos Pina, Paulo Flores and Ricardo Vinuesa.
With a lot of special activities for our young researchers, the conference was an
excellent place where we could finally meet in person after the pandemic. l

iacm expressions 51/22 34

for all inclusions under SEMNI please contact
Elias Cueto
ecueto@unizar.es

SEMNI awarded its annual prizes
n the occasion of the Conference on Numerical Methods held in the CanaryIslands, and during the gala dinner of the congress, SEMNI awarded its prizes
to their recipients.

O

These were Rubén Ibañez and Alberto Badías, awardees for the best thesis
defended during 2019 and 2020 respectively, and David Codony for the best thesis
defended during 2021. SEMNI’s young research prize, the Juan C. Simó prize, wasawarded to Emilio Martínez-Pañeda, from Imperial College, as the recipient of the2020 award, Marcos Latorre of the 2021 award and Matteo Giacomini, as therecipient of the 2022 prize—exceptionally, and due to the pandemic, this year weawarded the prizes corresponding to three years. l

Figures below:
Left to RightAlberto Badías,
Emilio Martínez-Pañeda,Marcos Latorre,and Matteo Giacomini
receiving their respective
prizesAntonio Huerta
SEMNI’s O. C. Zienkiewicz prize2022
inally, the award ceremony arrived at its
most important moment, the one in which
we awarded the O.C. Zienkiewicz prize toProf. Antonio Huerta. The O. C. Zienkiewicz
prize is the highest distinction awarded by
SEMNI every two years and recognizes
individuals for their lifelong contributions toscience and our community. Congratulations,
Antonio! lF

35 iacm expressions 51/22

he 15th World Congress on Computational Mechanics (WCCM-XV) and the
8th Asian Pacific Congress on Computational Mechanics (APCOM-VIII),
WCCM-APCOM 2022, was held in a fully virtual format from July 31 to August 5,
2022, and successfully concluded.

T

Number of allparticipants & the
number of participants
by region,
together with datafrom the previous
three WCCMs

Breakdownof registeredparticipants by country

iacm expressions 51/22 36

The decision to host the WCCM in Yokohama
was made in May 2018, and the first Organizing
Committee meeting was held on January 23,
2020. However, a state of emergency was
declared in Japan in April 2020 due to theglobal spread of the new coronavirus.
Therefore, the policy was changed to holdthe meeting in a hybrid format combining
face-to-face and virtual sessions. However,
due to the repeated spread and containment of infection by mutant strains sincethen, the format was further changed to a fully virtual format in February 2022.
The fully virtual format at WCCM-APCOM 2022 was designed so that after
presenters submitted their abstracts, they could create a video of their presentation
and upload it to the video site prior to the conference, allowing conference
participants to view it online and enter comments if they had questions. For theplenary/semi-plenary lectures, and mini-symposiums, live sessions were set up
during the conference period to provide an opportunity to ask questions directly tothe presenters, albeit virtually. Several Short Courses by the IACM and meetingsby the Female Researchers Chapter were also held as Side Events.

As a result of this format, statistical information shows that there were 6 plenary
lectures, 15 semi-plenary lectures, 287 total mini-symposia, and 2,065 total abstract
submissions.
In fact, while the number of abstract submissions as of the end of February 2022
was 3,061 in the declared hybrid event, the decision to hold the event completely
virtual format means that more than 30% of the abstracts were canceled (as ofAugust 8, 2022).
The number of participants was 2,345, slightly higher than the number ofpresentations. Table 1 shows the number of all participants and the number ofparticipants by region, together with data from the previous three WCCMs. The
breakdown of registered participants by country is also shown in Figure 2. Itshould be noted that the number of participants from the Asia-Pacific region, which
accounted for half of the participants, exceeded the number of registrants for theprevious WCCM-APCOM, which was held face-to-face in the same region.
With the help of many people in various phases of the event, from the invitation
to the day of the event, we managed to successfully complete WCCM-APCOM 2022.
I would like to express my sincere gratitude to all of you as the Congress Chair.
Junji Kato,
Deputy Secretary General
Kenjiro Terada
Secretary General
Seiichi Koshizuka
Congress ChairJSCES Summer Camp for Students 2022

he summer camp for studen ts 2022,” a successful series hosted by JSCES
from 2013, was held online. This event
was held annually onsite through 2019, but wascancelled in 2020 due to COVID-19. Since 2021
we have launched online special events. This
year, six video interviews were made available tomembers as the special online event (Figure 3).
Three doctoral students presented their ongoing
researches and their motivation for entering thedoctor coarse, and three keynote speakers gave
talks on their research experiences and theircareer in universities, national laboratories andindustry.

“T

Naoto Mitsume
Tsukuba University

Homepage for the online special event andinterview videos

37 iacm expressions 51/22

conference diary planner
5 - 8 March 2023 KomPlas Tech 2023 - XXVIII Conference on Computer Methods in Materials Technology
Venue:
PolandContact:
https://www.eccomas.org/conferences/
30 - 31 March 2023 SYMCOMP 2023 - VI Int Conf on Numerical 6 Symbolic Computation: Dev & Applications
Venue:
Évora, Portugal
Contact:
https://www.eccomas.org/conferences/
19 - 21 April 2023 2022 UKACM conference - Uk Association for Computational Mechanics
Venue:
Warwick, U.K.
Contact:
https://ukacm.org/
25 - 28 April 2023 CFC 2023 - 22nd IACM Computational Fluids Conference
Venue:
Cannes, France
Contact:
https://cfc2023.iacm.info/
20 - 22 May 2023 CM3 – Transport 2023 Computational Multi Physics, Multi Scales and Multi Big Data
Venue:
Jyväskylä, Finland
Contact:
https://www.eccomas.org/conferences/
30 May - 1 June 2023 Math 2 Product (M2P) - 1st Emerging Tech in Comp Science for Industry, Sustainability & Innovation
Venue:Taormina (Messina), Italy
Contact:
https://m2p2023.cimne.com/
1 - 3 June 2023 EUROGEN 2023 - 15th Int Conf on Evolutionary & Deterministic Methods for Design, Optimization & Control
Venue:
Chania, Crete, GreeceContact:
https://www.eccomas.org/conferences/
5 - 7 June 2023 COUPLED PROBLEMS 2023 - Int Conf on Coupled Problems in Science & Engineering
Venue:
Chania, Crete Island, Greece Contact:
https://coupled2023.cimne.com/
12 - 14 June 2023 COMPDYN 2023 - IX Int Conf on Comp Methods in Structural Dynamics & Earthquake Engineering
Venue:
Athens, GreeceContact:
https://www.eccomas.org/conferences/
12 - 14 June 2023 UNCECOMP 2023 - V Int Conf on Uncertainty Quantification in Computational Sciences & Eng
Venue:
Athens, Greece Contact:
https://www.eccomas.org/2022/04/01/thematic-conference-2023/
18 - 21 June 2023 YIC2023 - The 7th ECCOMAS Young Investigators Conference
Venue:
Porto, Portugal
Contact:
https://yic2023.fe.up.pt/,
18 - 21 June 2023 IGA 2023 - IX International Conference on Isogeometric Analysis
Venue:
Lyon, France
Contact:
https://www.eccomas.org/conferences/
19 - 21 June 2023 ADMOS 2023 - International Conference on Adaptive Modeling & Simulation
Venue:
Gotheburg, Sweden
Contact:
https://admos2023.cimne.com/
21 - 23 June 2023 CFRAC 2023 - The 7th Int Conf on Comp Modeling of Fracture & Failure of Materials & Structures
Venue:
Prague, Prague, Czechia
Contact:
https://www.eccomas.org/conferences/
25 - 27 June 2023 MSF 2023 - 6th International Conference on Computational Methods forSolids & Fluids
Venue:
Sarajevo, Bosnia-Herzegovina Contact:
https://eccomas.gf.unsa.ba/msf-2023/
27 - 29 June 2023 MARINE 2023 - X International Conference on Computational Methods in Marine Engineering
Venue:
Madrid, Spain
Contact:
https://marine2023.cimne.com/
25 - 27 June 2023 MSF 2023 - V International Conference on Computational Methods for Solids & Fluids
Venue:
Sarajevo, Bosnia-HerzegovinaContact: https:// eccomas.gf.unsa.ba/msf-2023
3 - 6 July 2023 SMART 2023 - IX Conference on Smart Structures and Materials
Venue:
Patras, GreeceContact:
https://www.eccomas.org/conferences/
5 - 7 July 2023 ICCCM 2023 - 7th International Conference on Computational Contact Mechanics
Venue:
Torino, Italy
Contact:
https://www.eccomas.org/conferences/
12 - 14 July 2023 AIMETA Groups - GIMC (Comp. Mechanics), GMA (Mechanics of Materials) & GBMA (Biomechanics)
Venue:Calabria, Italy
Contact:
http://www.gimc-gma-gbma-2023.unirc.it/
18 - 21 July 2023 CMP4 2023 - Computational Modelling of Multi-Uncertainty & Multi-Scale Problems
Venue:
Porto, Portugal
Contact:
https://www.eccomas.org/conferences/
23 - 27 July 2023 17th U. S. National Congress on Computational Mechanics
Venue:
Albuquerque, NM, USA
Contact:
17.usnccm.org
24 - 28 July 2023 MULTIBODY 2023 - ECCOMAS Thematic Conference on Multibody Dynamics
Venue:
Lisboa, Portugal
Contact:
https://www.eccomas.org/conferences/
25 - 29 July 2023 USNCCM16 - 16th U.S. National Congress on Computational Mechanics
Venue:
Chicago, Illinois
Contact:
http://16.usnccm.org/
26 - 28 July 2023 SIM-AM 2023 - IV International Conference on Simulation for Additive Manufacturing
Venue:
Munich, Germany
Contact:
https://www.eccomas.org/conferences/
20 - 23 Aug 2023 M-FET 2023 - III Modern Finite Element Technologies – Mathematical & Mechanical Aspects
Venue:
Mülheim, Germany
Contact:
https://www.eccomas.org/conferences/
28 - 30 Aug 2023 CSAI 2023 - Computational Sciences and Artificial Intelligence in Industry
Venue:
Trondheim, Norway
Contact:
https://www.eccomas.org/conferences/
4 - 7 Sept 2023 PCM-CMM 2023 - 25th International Conference on Computer Methods in Mechanics
Venue:
Gliwice, Poland
Contact:
http://cmm-solmech.ippt.pan.pl/.
5 - 7 Sept 2023 COMPLAS 2023 - XVII Int. Conference on Computational Plasticity
Venue:
Barcelona, Spain
Contact:
https://complas2023.cimne.com/
11 - 13 Sepy 2023 10th GACM Colloquium - 30th Anniversary of the German Association for Computational Mechanics
Venue:
Vienna Austria
Contact:
https://www.gacm.de/news
12 - 14 Sept 2023 COMPOSITES 2023 - IX Conference on Mechanical Response of Composites
Venue:
Trapani, Italy
Contact:
https://www.eccomas.org/conferences/
24 - 27 Sept 2023 2nd IACM Mechanistic Machine Learning & Digital Twins for Computational Science, Eng. & Technology
Venue:El Paso, TX, USA
Contact:
https://www.utep.edu/engineering/mmlde/index.html
2 - 4 Oct 2023 Structural Membranes 2023 - XI Int Conference on Textile Composites & Inflatable Structures
Venue:
Valencia, Spain
Contact:
https://structuralmembranes2023.cimne.com/
9 - 11 Oct 2023 PARTICLES 2023 - VII International Conference on Particle-based Methods
Venue:
Milano, Italy
Contact:
https://congress.cimne.com/particles2023/
10 - 13 Oct 2023 CMCS 2023 - II Int Conf on Computational Modeling of Complex Materials Across the Scales
Venue:
Eindhoven, Netherlands
Contact:
https://www.eccomas.org/conferences/
13 - 16 Nov 2023 XLIV CILAMCE - Ibero-Latin American Congress on Computational Methods in Engineering
Venue:
Porto, Portugal
Contact:
https://cilamce.com.br/
3 - 7 June 2024 9th European Congress on Computational Methods in Applied Sciences and Engineering
Venue:
Lisbon, Portugal
Contact:
https://eccomas2024.org/,
21 - 26 July 2024 WCCM/PANACM - 16th World Congress on Comp Mechanics & 4th PANACM Congress
Venue:
Vancouver, Canada
Contact:
https://www.cacse-accsg.ca/
38