Modelling Abrasive Wear via
DEM & PhenomenologicalModelsFranco Perazzo,
Rainald Löhner &Flavio De Barbieri
IACM Medal Acceptance Speech
J.N. Reddy
Numerical Linear Algebra:
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2 Modelling Abrasive Wear via DEM & Phenomenological Models
Franco Perazzo, Rainald Löhner & Flavio De Barbieri
7 IACM Medal Acceptance Speech
Delivered by J.N. Reddy

contents

8 Numerical Linear Algebra: 25th Anniversary Edition
Lloyd N. Trefethen & David Bau, III
Book Review by Dan Givoli
10
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30 Conference Diary Planner

Dear Members of IACM,
I am honoured to assume the role of President of theInternational Association for Computational Mechanics(IACM). My appointment, which took effect in thesummer of 2022, comes at a pivotal time for ourorganization and our field as a whole. I extend mysincere gratitude to all of you for your trust andsupport.
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isolated concepts but have become the common
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editorial

As we step into 2023, I am thrilled to report in-person
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In this dynamic landscape, we are witnessing theconvergence of transformative technologies, including
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In conclusion, I want to express my appreciation foryour commitment to the IACM community. Let us
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With warm regards,
Kenjiro Terada

M odelling A brasive W ear via DEM& P henomenological M odels
byFranco Perazzo
franco.perazzo@usm.cl
Universidad Técnica
Federico Santa María,
Valparaíso, Chile
Rainald Löhner
rlohner@gmu.edu
George Mason
University, Fairfax,USA
Flavio De Barbieri
flavio.debarbieri@usm.cl
Universidad Técnica
FedericoSanta María,
Valparaíso, Chile

iscrete element method (DEM) is acomputational technique used todescribe the movement of many particles
of different sizes and geometries, whose
interaction between them and the medium isrepresented by a contact model [1, 2, 3, 4,
5]. In most simulations using DEM, particles
with sizes in the order of millimeters andquantities on the order of a few thousand
achieve results in reasonable computation
times [6]. However, in industrial applications
with wear, it is often necessary to simulate
millions of particles to represent the process.
With advances in computer processing
power and optimization of algorithms, nowD

it is possible to simulate millions of particles
with complex geometries, using GPU(graphics processor unit) and parallel
processing [7]. Despite this great advancein computing power, there is still a greatchallenge. Abrasive wear is usually aphenomenon that develops slowly over time.
For example, in the mining industry, thelifters in a SAG mill are typically replaced
after four to five months of use, about three
thousand hours of mill operation, see
Figure 1. How can be simulated three
thousand hours of real time to remove about
100 millimeters in the lifter by wear?
To date, DEM has been used as an effective
way to address engineering problems tomodel the behavior of granular anddiscontinuous materials, such as concrete[8], sand [9], ceramics [10], among others.
Many engineering processes involve
loading, transport, crushing, smelting andabrasion of materials must be considereddiscontinuous at the engineering
scale of interest. In the field ofmining, DEM has been used to
predict the trajectory of the material
inside a comminution device and in themineral transfer hoppers [11, 12, 13, 14].
Another interest application in this areais the modeling of wear. Wear diminishes
the life of equipment, affecting its
productivity and operating costs.
The use of a numerical tool topredict wear allows reducing the costs ofexperimental prototypes when trying tomaximize the life of equipment. A simple
way to estimate the rate of abrasive-erosive

Figure 1: [31]a) (above) Inside view of a SAG mill.
Lifters are shown in red.
b) (right) Measurement of the wear in a lifter
according to the hours of operation

iacm expressions 52/23 2

wear using DEM code, is using the Archard
or Finnie equations [15, 16]. In the context
of comminution devices, one the first works
where this methodology was applied wasCleary [17]. Here the Finnie equation wasused to predict the wear rate in a ball milllifter, using a 2D model for different conditions of rotational velocity. A modified formof the Archard equation has also been usedand experimentally validated to predict thewear in the jaw crushers [18]. Subsequently,
new research work has been carried out topredict wear using DEM [19, 20, 21, 22, 23].
In all these works the effort to carry out
experimental tests that allow comparing thenumerical results obtained is highlighted.
Different types of tests can be implemented
to measure the rate of abrasive wear on
elements of machines used in the grindingof minerals [24]. One of them, with theability to control some of the variables that
influence abrasive wear, such as the force
applied and the speed, is the standard testof the wear wheel ASTM G65 [25]. This test
represents a good opportunity to validate
experimentally the results of the abrasive
wear rate calculated with DEM, as well as
the methodology used to correctly represent
the wear pattern. It also allows correctly
calibrate the granular material and its
properties when using DEM, thus improving
the reliability of numerical predictions. In thispaper, a numerical methodology based ona DEM code to model the abrasive wear
is presented. The Archard law is used to
calculate the loss of material in the zone of
the steel plate subjected to the wear. A finite
element surface mesh, which is deformed
according to the volume removed from theworn material, is used for the representationof the pattern of wear in the plate. An
important step in the implementation of themethodology to calculate the wear is thecalibration of the material. Specific tests are
implemented for this, which allow obtaining
the coefficients of rebound and friction
between particles, as well as between particles and the steel plate [26]. The numericalresults obtained from the rate and the wear
pattern are in good agreement with those of
the experimental test of the wear wheel.

Figure 2:
Dashpot model used for contact forces

Discrete Element Model.
Basic Equations
The equations describing the motion of thediscrete elements are the well-known
Newton-Euler equations for the balance offorces and moments [27]. The forces andmoments are given by the usual body forces(gravity, magnetic) and most importantly fromcomputational considerations contact forces
with other discrete elements/objects or walls.
Equations are integrated in time using an
explicit low-storage 4-stage (1/6, 1/3, 1/3,
1/6) Runge-Kutta scheme [28]. For thecontact, linear and nonlinear (Hertz) dashpot
models are used to estimate the forces
between particles (see Figure 2). The forces
are separated into normal and tangential, inboth case, spring stiffness and viscousdamping coefficient are used.
DEM-DEM and DEM/WALL Contact
Detection Algorithms
As in most DEM techniques, the overwhelming computational cost is due tocontact search (the actual contact force
calculation is insignificant). Therefore, caremust be taken in the design of fast contact
detection algorithms. In the present case,lists of possible contacts are built every
so often. These pairs are tested at the
beginning of each timestep to see if an
actual contact exists. Given that this test
is cheap, a compromise must be reached
between the extent of possible contacts(memory, tests if contacting) and the cost of
rebuilding the possible contact pairs. The
larger the list of possible contacts, the lessoften the list needs to be rebuilt. Efficientspatial data storage and search techniques
are crucial in obtaining fast-running,scalable DEM codes. In the present case,a simple bin data structure is employed forthe DEM-DEM contact search, while ahierarchical bin data structure (a series ofbins with increasing bin size) is used forthe boundary triangulation [29, 30].
3 iacm expressions 52/23

Surface Movement

Figure 3:
Surface recession with multiple normal

Wear Model
The wear of surface walls is computed
using the model of Archard as
dV = K·fn·ds = K·fn·|vt|dt , where
dV, K, fn, ds, vt and dt denote the change
in volume, wear coefficient, normal force,
relative displacement tangential to thewall, relative tangential velocity and timeincrement. Given that the wear occurs in amatter of days or weeks, and that a runof even a minute can consume copious
amounts of computer resources, a separation of timescales was implemented. The
present configuration is run for a relatively
small amount of physical time to get thestatistics of wear. For example, in a mill this
could be a few rotations. For all the faces
on the boundaries, the change in volume is
updated every timestep. As the faces incontact are known, as well as all other quantities required for Archard’s model, this stepis simple. At the end of the run, the totalchange in volume is used to compute a‘recession speed’ for each face. Denoting
by dV the accumulated change in volume,and by T0, T1 the beginning and ending(physical) times of the simulation, the recession speed is given by: Vr = dV/(A·(T1 − T0)with A the area of each face. The recession
speed is then used to extrapolate therecession distance dr (i.e. the wear) fromti to T2 >> T1 by dr = Vr·(T2 − T0). Once thesurface is moved via the recession distance,
the run is restarted and the cycle repeats.

Given the recession distance for each face,
the next step is to move the surface. This issimple if the surface is smooth. However,care has to be taken for cases where corners are present (see Figure 3). To handle
such cases, multiple normals are allowed atpoints. The average recession from all thefaces with similar normals is then used toobtain the final movement of the boundary
points. Before movement, the surface meshis checked to avoid post-movement facefolding, change in normals, and vanishingareas. If any such anomalies appear, therecession distance is reduced until a valid
configuration is obtained. One should
remark that this happens very seldomly andis not considered a problem.
ExampleThe proposed concept is exemplified forthe mini-mill shown in Figure 4. The millhas only 248 spheres that follow a size
distribution as shown in Figure 5. The larger
spheres are made of steel, the smaller onesof copper. The geometry, as well as thespheres after 60 sec (i.e. 6 rotations of
the mill) are shown in Figure 4.
The sequence of runs outlined above was
performed for 5 integration and surface
recession cycles. After each integration toT = 60 sec, the wear was extrapolated to
T = 3600 sec(1 hour), the surface recession
computed and the new surface used tocontinue the integration from the previous
run. A typical ‘wear map’ obtained after 6
rotations of the mill (T = 60 sec) is shownin Figure 6. Note the higher wear at thecorners, as well as the impact of the larger
spheres close to the side walls of the mill.
Figures 7 and 8 show the actual wear
obtained. The surface triangulation isclearly visible.

“ ... the methodology can compute realistic wear
patterns with CPU requirements that are acceptablein an engineering design environment.”
iacm expressions 52/23 4

Figure 4:
Mill and spheres at T = 60 sec

Figure 5:Size distribution of spheres (npopa=number of spheres bysize, npsum=cumulative spheres count). The Archard wear
coefficient was set to K = 10-10

Conclusion and Outlook
A methodology to predict wear via
Discrete Element Method (DEM) andphenomenological wear models has
been developed. The results obtained
to date show that the methodology cancompute realistic wear patterns with CPU
requirements that are acceptable in anengineering design environment. As withso many technologies, many improvements
are possible. Among the most obvious
ones, we mention:- Use of non-spherical elements tocharacterize the materials being crushed- Extension of the DEM code to distributed
memory environments- Link with flow solvers to account for the‘mushy phase’ at the bottom of mills- Extensive validation and verification. l

Figure 7:
Wear after each cycle

Figure 6:
Typical ‘wear map’ at T = 60 sec

Figure 8:
Wear after each cycle (zoom)
5 iacm expressions 52/23

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[28] J.C. Butcher, Numerical Methods for Ordinary Differential Equations; J. Wiley (2003).
[29] Munjiza, A., The Combined Finite-discrete Element Method, first ed. John Wiley & Sons, England (2004).
[30] Teschener M., Heidelberger B., Mueller M., Pomeranets D., and Gross M., Optimized spatial hashing forcollision detection of deformable objects. Proc. Vision, Modeling, Visualization, 47–54 (2003).
[31] Rivera, J., Comparative study of wear on the linings of a SAG mill as a function of operationalvariables. Engineering Dissertation Degree, Department of Mechanical Engineering, Universidad Técnica
Federico Santa María, Valparaíso, Chile (2022).

iacm expressions 52/23 6

IACM M edal A cceptance S peech
D elivered by J.N. R eddy
want to express my sincere appreciationand gratitude to the International
Association for Computational Mechanics
for bestowing this honor. I consider it to
be one of the most significant professional
honors of my life.

I

I will do my best to live up to the highstandard exemplified by the past recipientsof the Gauss-Newton Medal – some ofwhom are present here tonight. My sincere
and deepest respects to them; I feel deeply
honored to be included among them. I
have been fortunate over the years to havemet and be inspired by the works of several
previous recipients of the IACM Medal.
In the way of remarks and advice toyounger colleagues in the audience, I have
few thoughts to share. Some of thethoughts expressed here have alreadybeen included in my Timoshenko Medal
acceptance speech published in the Journalof Applied Mechanics in 2019.
Computational mechanics has emerged
as the “third scientific methodology,” in
addition to the traditional two pillars ofscientific inquiry, namely, mathematical andexperimentation studies. Computational
mechanics has contributed to unifying ideas

and bringing together diverse fields.
It provides an important link between
materials, design, and manufacturing.
Therefore, funding agencies must see thisimportant mechanics link in going from thecreation of novel materials to analysis,design, and manufacturing and support thecomputational mechanics research that
evaluates and certifies materials selectionin the design. Lastly, we must take pride inwhatever little we do to advance our field.
Once again, I thank the Major Awards
Committee of the IACM for this prestigious
award. No matter how much one deserves,
it is not possible for someone to receive anaward without the thoughtful considerationof the colleagues on the award committee
and those who provide the support letters.
I give my most sincere thanks to theseunnamed colleagues. I also want to takethis moment to thank my teacher andmentor, Professor J. T. Oden, and all mystudents and collaborators all over theworld who have contributed to my professional success that enabled me to receive
the IACM (Gauss-Newton) Medal. I thankmy wife for her love, support, and sacrificethroughout our married life. Finally, I thankyou all for your presence tonight, and I wish
you and your families the best in life. l

7 iacm expressions 52/23

Numerical Linear
Algebra:25th Anniversary Edition
Lloyd N. Trefethen & David Bau, III
SIAM, Philadelphia, 2022

B
O
O
K

ISBN:

0-89871-361-7, 361 pages, soft cover, $79 (List Price)

Contents: Preface; 1: Fundamentals; 2: QR Factorization and Least Squares;
3: Conditioning and Stability; 4: Systems of Equations;
5: Eigenvalues; 6: Iterative Methods;
Appendix: The Definition of Numerical Analysis; Notes; Bibliography; Index.
This is the 25th edition of the book originally published in 1997. The first author is awell-known applied mathematician from Oxford University. The second author worked
in Microsoft Corp. when the book was written, and today is a faculty member ofNortheastern University. This edition is identical to the original one except for new
forward and afterword.
This is a superb book, which I read years ago from cover to cover with great interest.
It covers standard material in numerical linear algebra, but does so in a very
non-standard and fresh way. A few examples that demonstrate this are given below.
In addition, the structure of the book is extremely appealing. It is divided into 40
short lectures, each one dedicated to a certain subject. It is thus easy to read andto study and can easily serve as a textbook for a graduate course in appliedmathematics or engineering. Each lecture ends with helpful exercises, and at theend of the book there are enrichment notes that relate to each lecture. The bookcontains examples for MATLAB codes, and algorithms written in boxes, whose
complexities are always indicated. It is inviting to read.

R
E
V
I
E
W

The Singular Value Decomposition (SVD) appears at the beginning of the book(lectures 4 and 5). Eigenvalues appear for the first time only in lecture 24. As
far as I am aware, this is the only treatment of linear algebra discussing singularvalues before eigenvalues. The use of SVD for the low-rank approximation of amatrix is very useful for information (e.g., image) compression, although thisapplication, as well as others, are not explained in the book. The computation of the
SVD appears in lecture 31, since it is a variant of the computation of eigenvalues.
Another manifestation of the very special order of presenting the subjects is that
Gauss elimination appears only in lecture 20,
after the lectures on SVD, QR, least squares
and conditioning.

by

Dan Givoli
Technion Israel Institute ofTechnology
givolid@technion.ac.il
iacm expressions 52/23 8

L.N. Trefethen

D. Bau, III

The topic discussed at length after SVD is QR factorization, decomposing any matrix
into a unitary matrix times an upper triangular matrix (possibly with a lower zero block).
QR factorization appears in various applications, such as the direct solution of a linear
system, least squares and iterative methods. An unstable way to calculate QR(Algorithm 7.1) and later the stable way (Algorithm 8.1) are presented. QR appears
also in the lectures on eigenvalues. The space given to this topic here is significantly
larger than in most standard treatments. In fact, the authors state that QR is the mostimportant algorithm in numerical linear algebra. Least squares and the pseudo inverse
are introduced in lecture 11.
Eight lectures discuss conditioning and stability. Backward error analysis is presented
in this context. Several examples for ill-conditioning are given, including Wilkinson’sclassic example of determining the roots of a high-order polynomial; see Figure 1.

Figure 1:
Wilkinson’s example of ill-conditioning.
This is Fig. 12.1 in the book.
The lectures on eigenvalues are very nicely presented. Only the standard eigenvalue
problem is discussed, not a word on the generalized eigenvalue problem that is very
important in computational mechanics (the latter is covered in books by Gilbert Strang).
Among the algorithms for calculating eigenvalues, the Arnoldi algorithm is presented
and analyzed in lecture 34. See Figure 2. Incidentally, sparse matrices are mentioned
in the book, but there is no emphasis on algorithms tailored for them.

Figure 2:
Illustration of the Arnoldi process of locating
eigenvalues. The small dots are the eigenvalues,
and the large dots are the Ritz values.
This is Fig. 34.3 in the book.

The Appendix includes some thought-provoking statements on numerical linear
algebra. For example, on page 324 the authors explain their objection to symbolic
calculations, and on page 326 they write “large-scale matrix eigenvalue problems
are about as easy to solve in practice as linear systems of equations.” I would be
surprised if the reader of this review is not surprised to read this.
In summary, this is a highly original and eye-opening treatment of numerical linear
algebra, and is highly recommended for anyone interested in scientific computing.

l

9 iacm expressions 52/23

Chinese Association for Computational Mechanics
Newsletter of Int. Conf. on DACOMA 2022
by CACM
International Conference on Data-Driven Computing
and Engineering Machine Learning 2022
byZhanli Liu, Zhuo Zhuang
School of Aerospace
Engineering
Tsinghua University
Beijing, China

he International Conference on Data-Driven Computing and Engineering Machine
Learning 2022 (DACOMA 2022) was successfully held in Beijing, China, on September
25-27, 2022. The conference is organized by Tsinghua University, and co-organized by
Tongji University, Leibniz Universität Hannover, Bauhaus-Universität Weimar, Beijing
Institute of Technology, Beijing Society of Theoretical and Applied Mechanics from China,
and Marie Sklodowska-Curie Actions. The chairmen of the conference are Prof. Zhanli Liufrom Tsinghua University and Prof. Xiaoying Zhuang from Tongji University. Along with theconference chairmen, Prof. Timon Rabczuk from Bauhaus-Universität Weimar, Prof. Xiang
Li from Hainan Normal University, and Prof. Jing Xie from Beijing Institute of Technology
serve on the conference organizing committee. The conference is supported by BeijingInternational Science and Technology Exchange Center and Chinese Association for
Computational Mechanics (CACM).

T

Aiming to promote the data-driven computing and artificial intelligence in engineering, as
well as scientific exchange among researchers, scientists, practitioners, and engineers inaffiliated disciplines, the series of DACOMA conferences have been held since 2019. The
first DACOMA conference was organized by Tongji University, China, and the chairman
was Prof. Timon Rabczuk. The main topics of the DACOMA 2022 include (but not limitedto) image reconstruction of materials, data-driven based constitutive modeling, machinelearning based solutions of PDEs, big data for design and optimization, uncertainty analysis
of geomechanics model, machine learning for materials characterization, data-driven
simulation techniques, high-performance data-processing, data-driven techniques in
multi-scale and multi-field simulations of materials, visualization and visual analytics ofmulti-source data, data-driven techniques for continuous and discrete methods, anddata-driven computing in dynamics. The conference is set as a hybrid onsite-online
pattern. The conference is broadcast on the Koushare Platform and Tencent Meeting.
Over 6000 people joined the online conference and discussion, and over 40 people
participated in the onsite conference in Beijing.
At the opening ceremony, the conference
chairman Prof. Zhanli Liu, on behalf of theorganizing committee, introduces the guests
who come to the conference onsite, including
the vice president of the International Association
for Computational Mechanics, Prof. Zhuo Zhuangfrom Tsinghua University, the director of BejingSociety of Theoretical and Applied Mechanics,
Prof. Yuesheng Wang from Beijing Jiaotong
University, Prof. Shaoqiang Tang from Peking
University, Prof. Dongping Chen from Beijing
Institute of technology, as well as Ms. Yushan Li
and Ms. Yanxiang Jia from Beijing International
Science and Technology Exchange Center.
Figure 1:
Prof. Zhanli Liu hosts
the opening ceremony

Figure 2:
The Vice President of IACM, Prof. Zhuo Zhuang
delivers the opening speech at the opening ceremony.

There are 6 plenary presentations and another 12 invited presentations at the conference.
The presentations are divided into 8 sessions. The chairmen of each session are
Prof. Yuesheng Wang, Prof. Shaoqiang Tang, Prof. Xiaoying Zhuang, Prof. Leiting Dong,
Prof. Xiaozhi Tang, Prof. Xia Liu, Prof. Zhanli Liu, and Prof. Jing Xie.
iacm expressions 52/23 10

for all inclusions under CACM please contact
Zhuo Zhuang
zhuangz@tsinghua.edu.cn

Figures 3:
Prof. Zhuo Zhuang, Prof. Shaoqiang Tang, and Prof. Dongping Chen are invited to give plenary presentations

In the plenary presentation session, Prof. Zhuo Zhuang from Tsinghua University presents“Combination data-driving with mechanics model for defect bone reconstruction” anddiscusses some key mechanics problems in bone reconstruction. Prof. Shaoqiang Tangfrom Peking University presents “Some recent progresses on clustering analysis fornumerical homogenization,” in which he shows the computational acceleration with theclustering method and its application to some specific problems, including crack
propagation and elastodynamics. Prof. Dongping Chen from Beijing Institute of Technology
presents “Reaction kinetics of energetic materials: applications of data-driven models”,
and introduces his recent work based on the chemical reaction neural network.
Figures 4:
Prof. Timon Rabczuk,Prof. Chenfeng Li, andProf. Xiaojun Li arepresenting plenary
speeches online

There are also three plenary speeches given online. Prof. Timon Rabczuk from
Bauhaus-Universität Weimar presents “Scientific machine learning: application toengineering and materials science.” Prof. Chenfeng Li from Swansea University presents“Machine learning for heterogeneous microstructure characterization, reconstruction
and analysis.” Prof. Xiaojun Li from Tongji University presents “The development andapplication of data-driven models for subsea TBM tunnel in complex geological condition.”
Figures 5:
The invited presentation
speakers receive
certificates from thesession chairmen

The invited presentation speakers receive certificates from the session chairmen
The 12 invited presentation speakers are Prof. Shan Tang, Prof. Qian Zhang, Prof. Leiting
Dong, Prof. Heng Hu, Prof. Zhuojia Fu, Prof. Jianjun Chen, Prof. Kai Zhang, Prof. Xiaolei
Yang, Prof. Weixi Huang, Prof. Hongling Ye, Prof. Xiang Li, and Prof. Haowen Dong.
After each presentation, a certificate of the DACOMA conference presentation is granted
to the speaker.
In the closing ceremony of DACOMA 2022, Prof. Zhanli Liu introduces six Best Paper
Award recipients, who are selected by the conference committee from all the papers
submitted to the DACOMA 2022 conference but cannot be presented in person. Afterappreciating the conference committee and the organizing team, he wishes great successto the DACOMA conference in the next year. On behalf of the DACOMA 2023
organization committee, Prof. Jing Xie welcomes people to participate in the next
conference in October 2023, which will be organized by Beijing Institute of Technology. l

Figure 1:
Prof. Jing Xie sends theinvitation for DACOMA 2023
11 iacm expressions 52/23

UKACM 2023 Conference
he 2023 conference took place on 19th-21st of April 2023. Organised by
Dr Mohaddeseh Mousavi Nezhad and Dr Mohammad Rezania (University of
Warwick) with 70 contributed talks, 5 plenary speakers and a total of 95 participantsfrom 30 institutions.

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:• The interface between rigorous mathematical modelling, analysis,
and high-performance computing in fluid mechanics.
(Dr Radu Cimpeanu, University of Warwick)• Modelling of coupled chemo-mechanical phenomena in solids(Prof Laurence Brassart, University of Oxford)
UKACM Plenary Speakers
Four plenary lectures at the conference were delivered by the following
distinguished researchers:
Prof. Chris Pearce, University of Glasgow

Prof. James Sprittles, University of Warwick

Prof. Alberto Guadagnini, Politecnico di Milano

Prof. Stephane Bordas, University of Luxembourg
In addition, Dr Jinlong Fu delivered the closing lecture, entitled as winner of the2021 Roger Owen PhD Thesis Award.
UKACM Conference Awards
The following delegates received the three UKACM conference awards:• Agustina Felipe from Swansea University received the Mike Crisfield Prize forthe paper “A coupled HDG-FV method for incompressible flows simulations”.
iacm expressions 52/23 12for all inclusions under UKACM please contact
Rubén Sevillar.sevilla@swansea.ac.uk••

Robert Bird from Durham University received the Nina Cameron Graham prize
for the paper “Cone Penetration Tests (CPTs) in bi-phase soils: a material point
approach with rigid body interaction”.
Ted O’Hare from Durham University and Nima Sarmadi from the University of
Warwick received Laura Annie Willson prize for the papers “A geometrically exact
finite element method for micropolar continua with finite deformations” and“The effects of bedding orientation on the hydraulic fracture trajectories in layered
heterogeneous rocks”, respectively.

Special issues in the European Journal of Computational Mechanics
Attendees to the 2023 UKACM conference have been invited to submit a paper to a
special issue in Engineering with Computers entitled “Advances in Computational
Mechanics”. The issue is expected to be published in 2024.
In addition, three UKACM board members are organising the special issues:•“Computational Mechanics Applications in Aerospace Engineering”,
guess-edited by Dr Jose Luis Curiel Sosa.
•“Advanced Computational Modelling of Composite Materials”,
guess-edited by Dr Wei Tan•“Advances in computational modelling of fluid-structure interaction withflexible and multibody structures”, guess-edited by Dr Chennakesava Kadapa.

2022 Roger Owen PhD Thesis Award
The winner of the 2022 Roger Owen PhD Thesis Award was Dr Tim Hageman(University of Sheffield).

UKACM 2023 Autumn School
The first UKACM Autumn School will be organised by Glasgow University.
The school will take place online on 6-8th September 2023 and will focus on
Mixed Finite Element Formulations in Solid Mechanics.
UKACM 2024 Conference
The 2024 UKACM conference will be organised by Prof Will Coombs, from
Durham University. The Conference and School will take place in April 2024. l
13 iacm expressions 52/23

The Workshop on Establishing Benchmarks for DataDriven Modeling of Physical Systems
eld April 6-7, 2023 at the University of Southern California in Los Angeles, theWorkshop on Establishing Benchmarks for Data-Driven Modeling of Physical
Systems was sponsored by the Data-Driven Modeling TTA of USACM. The
organizers were Professors Assad Oberai (University of Southern California), Alireza
Doostan (University of Colorado, Boulder), Paris Perdikaris, (Universityof Pennsylvania) and Jian-Xun Wang (Notre Dame University)

H

Over the last decade the field of data-driven modeling for physical systems has
sparked tremendous interest and undergone rapid growth. This has led to thedevelopment of many new algorithms that have shown initial promise. This rapid
growth has made it imperative that a set of benchmarks be established so thatdevelopers of models can quickly access FAIR data for training and testing theiralgorithms, new models can be consistently compared against existing algorithms,
and users/adopters of these algorithms can easily determine which algorithms are
best suited for their needs.
With this as motivation, this workshop brought together experts in this field toestablish a set of benchmarks in operator learning, inference of dynamical systems
and modeling in high-dimensional data space. Participants and speakers included
experts from universities, national labs and industries. The workshop included
around 30 technical talks and three discussion sessions. The outcome of the
discussion was a clear delineation of the path forward for developing, advertisingand curating these benchmarks. These ideas will be written up as a white paperin the next couple of months. Stay tuned!

Figure 1:
Prof. Oberai addressing
a speaker at the Workshop

New Technical Thrust Area
on Environment and Energy Modelinghe new USACM Energy & Earth Systems TTA encompasses a broad rangeof topics involving the modeling and analysis of earth systems and energy
applications. Topics relevant to the TTA include: climate and earth systemmodeling; climate couplings; geomechanics; wind, solar and nuclear energy;
carbon sequestration, capture and storage; oil/gas recovery. The TTA will promoteadvancements in both traditional first principles-based modeling and simulation, as
well as the development of innovative data-driven model reduction and analysis
methods, applied to the aforementioned domains.

T

The inaugural committee is composed of Irina Tezaur from Sandia National
Laboratories, Steve WaiChing Sun from Columbia University, Yuri Bazilevs from
Brown University and Clint Dawson from The University of Texas at Austin.
iacm expressions 52/23 14

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

USACM Announces
New Award
n recognition of her outstanding accomplishments in the field of computational
mechanics, USACM is pleased to announce the establishment of the
Mary F. Wheeler Medal. The first award will be made in 2025.

I

Description of the award is as follows:
The Mary F. Wheeler Medal is given in recognitionof outstanding and sustained contributions tointerdisciplinary and emerging areas including earth,environmental and energy sciences (EEES).
These contributions shall generally be in the form ofimportant research results that significantly advancethe understanding of theories and methods impacting
EEES and other emerging areas. Industrial applications
and computational analysis that advance EEES shallalso represent accomplishments worthy of recognition.

Figure 2:
Mary F. Wheeler

Her biography may be found athttps://oden.utexas.edu/people/directory/Mary-F.-Wheeler/.

Workshop on Data-Driven
and Computational ModelingofMaterials Across Scales
he USACM TTA on Nanotechnology and Lower Scale Phenomena hosted
the Workshop on Data-Driven and Computational Modeling of Materials
Across Scales on the UCLA campus, May 10-12, 2023.

T

The Workshop covered various aspects of multiscale modeling, including
data-driven and computational approaches. Specific thrust areas of theworkshop included:
m
m
m
m
m

machine learning approaches to problems in the mechanics of materials,
mechanics and physics of low-dimensional materials(nanomaterials – 0D, 1D and 2D materials),
multiscale physics/mechanics of coarse-graining,
multiscale design of materials and inverse problems, anddefects and interfaces.

The Workshop featured 22 invited speakers(https://sites.google.com/usacm.org/home/speakers), 14 poster
presentations preceded by lightning talks, and panel discussions on each of thefive topics to review current trends and issues facing each area. Participants
represented a wide spectrum of demographics and diverse institutions.
Animated discussions on questions such as how machine learning models canbest be used in computational materials modeling across scales, how reliable
experimental and computational data may be generated, standardized andshared, and how latest advancements in artificial intelligence may be harnessed
for materials design, were held.
The Workshop was organized by Professors Amartya Banerjee (UCLA),
Nikhil Admal (University of Illinois at Urbana-Champaign), Alejandro Strachan(Purdue University), and Surya Kalidindi (Georgia Institute of Technology).
15 iacm expressions 52/23

USACM TTA Virtual Seminars
everal TTAs of the USACM continued holding monthly virtual seminars
which have featured guest speakers and discussions on various topics ofimportance 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 during theSpring 2023:

S

TTA on Large Scale Structural Systems and Optimal Design:
Early Career ColloquiummApril 5: Prof. Ju Liu, Southern University of Science and Technology
Recent Advancements in Structure-Preserving Integration for Nonlinear
and Inelastic ProblemsmMarch 1: Prof. Subhayan De, Northern Arizona University
Design Optimization Under Uncertainty Using Stochastic Gradientsm

February 1: Prof. Sid Kumar, Delft University of Technology
What Machine Learning Can Do for High-Dimensional Designof Metamaterials

TTA on Uncertainty Quantification and Probabilistic Modelingm

May 25: Laura Swiler, Sandia National Laboratories
Uncertainty Quantification and Sensitivity Analysis Supporting Performance
Assessment of Nuclear Waste RepositoriesmApril 20: John D. Jakeman, Sandia National Laboratories
Recent Advances in Multi-Fidelity Uncertainty Quantificationm

March 23: Somdatta Goswami, Brown University
Integration of Numerical Modeling and Machine Learning in MechanicsmMarch 9: Bruno Sudret, ETH Zürich
Recent Developments on Surrogate Models for Stochastic Simulators l

USACM Upcoming Events

iacm expressions 52/23 16m

17th U.S. National Congress on Computational Mechanics,
July 23-27, 2023, Albuquerque, New Mexico;17.usnccm.org

mAdvances in Computational Mechanics;
A Conference Celebrating the 80th Birthday of Thomas J.R. Hugheswith Special Track:
Computational Fluid-Structure Interaction – Frontiers in Methods andApplications (CFSI 2023) ,October 22-25, 2023, Austin, Texas.
Write to admin@usacm.org for details. l

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

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 Japan through communication
with e-mail and web page (https://ja-cm.org/index-e.html). The number ofindividual members is about 330. JACM members actively participate in the IACM
activities.

T

On March 4th, 2023, the third JACM awardee seminar was held in an
in-person/online hybrid format. The purpose of this seminar series is to haveresearchers who received the JACM awards recently give lectures on their latest
research activities. The first and second seminars in December 2021 and March2022 were held fully online due to the COVID-19, and this was the first seminar
held as a partial face-to-face event.

Figure 1:
Professor Kazuki Shibanuma

Figure 2:
Professor Daigoro Isobe

Two lectures were given in the seminar. The firstone entitled “development of a numerical model
for simulating brittle crack propagation and arrest
behavior in steel plate based on the s-version FEM”
was presented by Professor Kazuki Shibanuma(University of Tokyo, Figure 1), who is the JACM
Young Investigator Award winner of year 2020.
The second one was “solving structural dynamics
using beam elements –from collapse analysis ofbuildings to control of robotic architectures–”given by Professor Daigoro Isobe (Tsukuba
University, Figure 2), received the JACM
Computational Mechanics Award of year 2020.
The speakers and in-person participants attended
the seminar at Waseda University, which wasbroadcast to remote participants (Figure 3).

The JACM plans to hold this seminar series twice or three times a year in the
future l
Figure 3:Group Photo of
third JACM awardee seminar
held on March 4th, 2023

17 iacm expressions 52/23

he 2023 general assembly meeting of JSCES was held at the Ito International
Research Center, the University of Tokyo, Japan, on May 23, 2023. Both theoperating and financial review for the previous fiscal year and operation andfinancial plan for this fiscal year were reported in this meeting (Figure 1).
The general assembly meeting was followed by the JSCES special symposium,in which a lecture was given by Dr. Keizo Ishii, Founder & Chairman of Quint
Corporation. He delivered a talk entitled “Creating Markets with Computational
Engineering Software” (Figure 2). He gave a very valuable lecture on the historyof the finite element method and optimal design, their pioneers, and interesting
episodes he himself experienced in computational engineering. In explaining how
he established Quint Corporation, he conveyed his high aspirations and sincere
attitude toward manufacturing, which greatly impressed the audience.
The 2023 general assembly
meeting of JSCES

Dr. Keizo Ishiin the same day, JSCES prizes were presented to those researchers andpractitioners who have marked outstanding achievements and contributions.
This year’s recipients were Prof. Takahiro Yamada and Prof. Naoki Takano (TheJSCES Achievements Award), Prof. Tomohiro Takaki (Kawai Medal), Mr. Tomoharu
Saruwatari (Shoji Medal), Central Research Institute of Electric Power Industry(Technology Prize), Mr. Makoto Onodera and Mr. Takashi Hamaguchi (Technology
Prize) and Dr. Yasutomo Kanetsuki (Young Technical Researcher Award).
Paper awards associated with the Transaction of the JSCES (see,https://www.jstage.jst.go.jp/browse/jsces) were also given to the following
researchers: Dr. Takeki Yamamoto, Dr. Takahiro Yamada and Dr. Kazumi Matsui(Outstanding Paper Award), Mr. Riichi Sugai (Young Researcher Paper Award) and
Dr. Reika Nomura (Young Researcher Paper Award). Dr. Tokimasa Shimada and
Dr. Daniel Shigueo Morikawa were awarded for their outstanding Ph.D. dissertation(Figure 3).
Award Ceremony for
JSCES Prizes

iacm expressions 52/23 18

he 28th Conference on Computational Engineering and Science, chaired by
Dr. J. Matsumoto (AIST), was held during May 31 – June 2, 2023, at Tsukuba
International Congress Center (Tsukuba, Japan). The conference was attended
by about 591 participants, and 370 papers with full lectures were presented byresearchers, graduate students, and practitioners. Fruitful discussions were
exchanged in 30 organized sessions associated with a plenary lecture, graphic
awards and 8 luncheon seminars. Special seminars were also organized at lunch
times to inspire graduate students in the field of computational mechanics by offering
small talks from four speakers. The participants were informed on the images andexcitements of career paths after their graduation. The JSCES scholarship award,
also aimed to promote young researchers, was presented to Mr. Yasutoshi Taniguchi(Waseda Univ.). The banquet of the conference was held at Hotel Nikko Tsukuba
with almost 300 attendees (Figure 4).

The conference banquet

n the second day of the conference, a plenary lecture entitled “Computational
autonomous synthesis of robot mechanisms – challenge and response” wasdelivered by Dr. Yoon Young Kim, the distinguished Professor of Seoul National
University, Korea (Figure 5). In his lecture, he presented the design of rigid-bodymechanisms applicable to the design problem of wearable exoskeletons andtransformable wheel robots, where large motion and high-force transmission are
considered. For these difficult design problems, Dr. Kim developed a new approach,the autonomous mechanisms synthesis, and introduced several successful research
projects, including the process of devising the method and some of the difficulties
encountered at the time.
Prof. Yoon Young Kim received “The JSCES Grand Prize 2022”, for his outstanding
contributions in the field of computational engineering and sciences, at the following
ceremony (Figure 6). l
Dr. Yoon Young Kim
Professor ofSeoul National University

Prof. Yoon Young Kim
receiver of the
JSCES Grand Prize 2022
19 iacm expressions 52/23

GACM Best Ph.D. Award2022
e are very pleased that the outstanding doctoral thesis ofDr.-Ing. Ivo Steinbrecher is honored with the GACM Best Phd Award 2022.

W
Follow GACM

His dissertation "Mixed-Dimensional Finite Element Formulations for Beam-to-Solid
Interaction" was written at the University of the Bundeswehr Munich under thescientific supervision of Prof. Alexander Popp. The official award ceremony will takeplace during the next GACM colloquium in Vienna.
Dr.-Ing. Ivo Steinbrecher
Ivo Steinbrecher's dissertation deals with the mathematical modeling and highfidelity numerical simulation of mixed-dimensional systems in nonlinear structuraland solid mechanics, and in particular with the embedding of dimensionally reduced,
1-dimensional beams into 3-dimensional computational domains. Such mixeddimensional formulations have a high practical importance for numerous applications
and problems in computational mechanics and beyond: one thinks exemplarily offiber-reinforced materials such as reinforced concrete, CFRP or biological tissue
material.
For all new methodological developments proposed in the work, the finite element
method (FEM) is used, in the context of which Ivo Steinbrecher makes use ofparticularly powerful element formulations both for the 1-dimensional embeddings(implemented by geometrically exact beam elements) and for the 3-dimensional
solids. The major scientific novelty value of his work lies on the formulation of suitablecoupling conditions for the underlying degrees of freedom of 1D beams and 3D solids
as well as on their numerical implementation. Standard solutions in commerciallyavailable FEM software packages today mostly rely on simplified 1D rebar elements,
homogenized 3D models or fully resolved 3D models, while the 1D-3D models
favored by Ivo Steinbrecher can so far only be analyzed with considerable limitations(e.g., no coupling of the rotational degrees of freedom of the beams, restrictions in
the positioning of the embeddings, etc.).
In the context of his work, Ivo Steinbrecher considers mixed-dimensional coupling
problems with increasing degrees of complexity. Beginning with the "simple"
coupling of the displacement degrees of freedom of 1D-beams and 3D-solids,
essential new scientific contributions lie above all in the coupling of the rotational
degrees of freedom, in the coupling of 1D beams and curved 2D surfaces as wellas in unilateral 1D-3D-contact conditions with tangential sliding. The dissertation
also deals in detail with expected limitsof the scope of his methods, which
are formulated in advance based on
analytical considerations of singularities
in displacement and stress fields.
The validity limits finally actuallyobserved during the convergencestudies confirm his assumptions withremarkable accuracy.
Ivo Steinbrecher has already publishedthe results of his scientific work in threejournal articles as first author andanother three journal articles as
Figure 1:
Dr.-Ing. Ivo Steinbrecher

iacm expressions 52/23 20

for all inclusions under gacm please contact:
Norbert Hosters
gacm@gacm.deco-author in high-ranking international peer-reviewed journals. This underlines theimpact that his research work is already achieving in the scientific community. In
this context, it is also worth mentioning that Ivo Steinbrecher was awarded
the prestigious Robert J. Melosh Medal 2021 by Duke University(USA) and was chosen as a winner of the 13th ECCOMASPhD Olympiad at the 7th ECCOMAS Young
Investigators Conference 2023 in Porto. ! l
Figure 2:
Fiber-reinforced plate modeled wit mixed-dimensional
beam-to-solid coupling

Figure 3:
Photorealistic rendering of the impactof a tennis ball on a tennis racket
simulated using mixed-dimensional
beam-to-solid contact

10th GACM Colloquium on
Computational Mechanics for Young Scientists
from Academia and Industry
Colloquium Chairpersons
Fabian Key, Marco De Paoli, Antonia Wagner, Merten Stender"GACM meets sustainability" -- this is the motto of the 10th GACM Colloquium on
Computational Mechanics for Young Scientists from Academia and Industry. It willtake place from September 10 to 13, 2023 in Vienna, Austria. Designed as a certified
sustainable event (» EcoEvent), the colloquium will be hosted at TU Wien. In addition
to the 10th anniversary of the GACM Colloquium itself, it also invites to celebrate the30th anniversary of the GACM.
We are pleased to announce the plenary lectures by Prof. Liesbet Geris (Universityof Liège and KU Leuven), Dr. Dirk Hartmann (Siemens Digital Industries Software),Prof. Jelena Ninic (University of Birmingham), Prof. Alexander Popp (UniBW München),Prof. Sebastian Schöps (TU Darmstadt), and GACM Best PhD Award Winner
Dr. Ivo Steinbrecher (UniBW München).
We cordially invite you to participate in the GACM Colloquium 2023 and are looking
forward to meeting you in Vienna.
Detailed information can be found here: https://colloquia.gacm.de/ l

21 iacm expressions 52/23

GACM Movies a new initiative, GACM recently
published an image film on our
YouTube channel
https://www.youtube.com/@gacmev.

A

The film highlights all the significant
facets of computational engineering.
It is not only meant to showcase thework in this exciting field at theintersection of engineering, mathematics,
and computer science. It is especiallymeant to get excited about our sharedpassion those future talents who may
not have encountered it before.
If you like the movie, please help
expand its reach. Please like orcomment on the video and related posts
to increase its weight in the algorithms
or link to the film in other social media
channels. And feel free to link to thevideo on YouTube in your own channels.
This way, we can bring the field's appeal
to a broader audience and expand ourcommunity with great new members! l

Figure 4, 5, 6 & 7:
Screenshots fromGACM Movie

iacm expressions 52/23 22

for all inclusions under GIMC please contact
Sonia Marfia
sonia.marfia@uniroma3.it
Gruppo Italiano di
Meccanica Computazionale

GIMC Best PhD Thesis Award
he GIMC Best PhD Thesis Awards committee, composed by Elio Sacco(Università di Napoli, Federico II), Giovanni Castellazzi (Università di Bologna),
Mauro Corrado (Politecnico di Torino), Flavio Giannetti (Università di Salerno)
and Francesco Picano (Università di Padova), selected the following theses,
defended in 2022, as the best Theses in Computational Solid and Fluid
Mechanics:

T-

Dr. Andrea Opreni, Politecnico di Milano “The direct parametrisation method
for invariant manifolds: developments and application to large dimensional
finite element models of MEMS structures”. This thesis was also selected
as candidate to the ECCOMAS PhD Award-

Dr. Davide Ninni, Politecnico di Bari “Development of a multi-GPU solver
for atmospheric entry flows with gas-surface interactions”

GIMC GMA GBMA 2023
Reggio Calabria
July 12-14, 2023
he AIMETA Groups of Computational Mechanics (GIMC), of Materials (GMA) andof Biomechanics (GBMA) are organizing a congress “GIMC GMA GBMA 2023”
that will take place in Reggio Calabria on July 12-14, 2023.

T

A special session will be devoted to the presentation of the PhD theses in
Computational Mechanics winner of the GIMC award 2022.
A special session will be organized for young researchers in which the best
presentation will be awarded. All the details can be found at the web site:
https://www.gimc-gma-gbma-2023.unirc.it/ l

23 iacm expressions 52/23

for all inclusions under CEACM
please contact
Adnan Ibrahimbegovic
adnan.ibrahimbegovic@utc.fr
http://www.gf.unsa.ba/web/

Figure 1:
Josef Eberhardsteiner
CEACM Prof. Mang Award

Figure 2:
Jurica Soric
CEACM Prof. Mang Award

Figure 3:
Joze Korelc
CEACM Computational
Mechanics Award

Figure 4:
Richard Schussnig
CEACM Best Thesis Award
iacm expressions 52/23 24

he Central European Association for Computational Mechanics (CEACM), has
attributed newly created CEACM Awards to honor active researchers from CEACM
partner countries, regrouping (in alphabetical order): Austria, Bosnia and Herzegovina,
Croatia, Czech Republic, Hungary, Slovakia and Slovenia. This year, the meeting was heldin early March 2023. Three different types of awards are given by CEACM. In particular,
the senior scientists are honored by CEACM Prof. Mang Award, the established scientists
by CEACM Computational Mechanics Award and young researchers by CEACM Best
Thesis Award.

T

The CEACM Prof. Mang Award is the highest honor attributed by CEACM. It is named after
the association founding father Herbert Mang, Professor at TU Wien, and its first President
1992-99. The CEACM Prof. Mang Award is bestowed each year to honor an outstanding
individual who has demonstrated sustained efforts in advancing either theoretical orpractical aspects of computational mechanics and who provided strong leadership either inacademic environment or in different industrial applications. This award was given for the
first time in 2022 to two CEACM members: Prof. Vladimír Kompis, one of the CEACM
founding fathers, and Prof. Adnan Ibrahimbegovic, the current CEACM president. The
CEACM scientific board again decided this year to attribute two Prof. Mang Awards todistinguished colleagues who have contributed to a large extent to many CEACM activities
and served as its representatives in either IACM or ECCOMAS associations. The first
award is given to Josef Eberhardsteiner (Figure 1), Professor of Civil Engineering at
TU Wien, who has provided a long time CEACM representation in ECCOMAS, and who
currently serves as CEACM representative in ECCOMAS Management Board. The second
award is given to Jurica Soric (Figure 2), Professor of Mechanical Engineering at Universityof Zagreb, who served as CEACM president, and has been a driving force in Croatia andorganizer of many international conferences for CEACM members.
The board also decided the CEACM Computational Mechanics award for the establishedscientists, which is attributed for the first time this year. The CEACM Computational
Mechanics Award is bestowed to honor exceptional individual contributions not only to
traditional but also to broader fields of interest to Computational Mechanics that reachednotoriety within the region and internationally. The winner is Jože Korelc (Figure 3),
Professor of Structural Engineering at Department of Civil Engineering, University of
Ljubljana, Slovenia. Jože is recognized for his numerous scientific contributions, and mostimportantly the development of a scientific software AceFEM, which is distributed as a partof Mathematica software package (https://www.wolfram.com/products/applications/acefem/)
and currently used by many research groups world-wide for efficient developments of new
formulations in Computational Mechanics.
The CEACM scientific board finally attributed a Young Researcher Award, which was
created by CEACM to honor an exceptional contribution of a young scientist, who hascompleted his/her doctoral thesis in the broad field of Computational Mechanics within
the year of the award call. The award winner is Richard Schussnig (Figure 4), whocompleted his thesis supervised by Prof. Thomas-Peter Fries at TU Graz in the domainof fluid-flow computations in application to hemodynamics. This thesis is nominated by
CEACM for the ECCOMAS Best Thesis Award 2022 competition and the winner is awarded
with a stipend to cover the participation cost in ECCOMAS MSF 2023, which is this year’s
CEACM special interest conference.
ECCOMAS MSF 2023 (which stands for: International Conference on Computational
Methods for Solids and Fluids 2023) is already 6th in a long series of meeting, which is
this year jointly organized by University of Sarajevo, Academy of Sciences and Arts of
Bosnia and Herzegovina and UT Compiegne. The ECCOMAS MSF 2023 meeting willtake place in June 25-27, 2023, in Bosnia capital, Sarajevo. It is featuring a number ofdistinguished lectures (by Professors Ladeveze, Mang, Matthies, Ohayon, Pimenta,
Damjanovic, Stergiopulos, Trovaluschi, Hellmich, Chamoin, Ibrahimbegovic) and 17
organized Mini-Symposia on many different topics in the domain. More information is
given at the meeting website: https://eccomas.gf.unsa.ba/msf-2023/. lfor all inclusions under
CACSE please contact
Reza Vaziri
reza.vaziri@ubc.ca
The Canadian Association for Computational Science and Engineering
Association Canadienne pour le Calcul en Sciences et Génie

1st CACSE Conference on Recent Trends
and Developments in Computational Science& Engineering
Banff, Alberta, Canada
January 14-16, 2023
he First Conference of the Canadian Association for Computational Scienceand Engineering, CACSE/ACCSG 2023, was held in person on January 14-17,
2023, at the Fairmont Banff Springs Hotel in the Canadian Rockies.

T

The inaugural conference brought together about thirty experts from academic
institutions across Canada to discuss recent advances, novel applications, andemerging research directions in the field of Computational Science andEngineering. The technical program consisted of twenty-nine talks in various
fields of CSE and several panel sessions to discuss future activities anddirections of the Association. The social program also included a welcoming
reception and a banquet in one of the beautiful rooms of the venue. The event
was organized by Profs. Artem Korobenko (University of Calgary), Reza Vaziri(University of British Columbia), Serge Prudhomme and Marc Laforest(Polytechnique Montréal), and Robert Gracie (University of Waterloo).
The scientific event was a frank success and received such enthusiasm fromthe participants that it was decided that the second CACSE will be held next year
at the same venue in Banff on January 13-17, 2024. The objectives of the
Association (see website at https://www.cacse-accsg.ca) are to promote andfoster education, research, and industrial practice in Computational Scienceand Engineering, to organize and coordinate activities in Canada such as
periodic national and regional conferences. CACSE/ACCSG is proud tohost the 16th WCCM and 4th PANACM Congress on July 21-26, 2024, inVancouver, BC, the first time it will be held in Canada(https://www.wccm2024.org).

By:
Serge Prudhomme(founding CACSE President)
Reza Vaziri(CACSE President)& Artem Korobenko(CACSE Vice-President)

25 iacm expressions 52/23

Welcome from the new ABMEC President
he ABMEC (Brazilian Association for Computational Methods in Engineering), founded
in 1997, is a non-profit scientific society dedicated to advancing the knowledge and useof computation in all areas of engineering and related sciences. It serves as a high-level
scientific and academic forum for the promotion and dissemination of knowledge in thesefields, bringing together researchers, professors, engineers, physicists, mathematicians,
and graduate and undergraduate students from across the country who are at the forefrontof knowledge in these areas.

T

It is an honor and privilege for me to serve ABMEC as the association's firstfemale president. The current board, which took office on January 1, 2023,
includes also Felicio Bruzzi Barros as vice president, Marcus Vinicius G.
de Morais as treasurer, and Darlan Carvalho and Marcos Arndt as first andsecond secretaries.
I am deeply grateful to the previous board, including former president Felicio
Bruzzi Barros, vice president Roque Pitangueira, treasurer Lapo Gori, andsecretaries Darlan Carvalho and Marcos Arndt.
Figure 1:
ABMEC board for thebiennium 2023-2024

I am excited to continue supporting the younger generation of Brazilian researchers.
Our goal is to ensure that ABMEC helps them achieve their objectives. lhe organization of CILAMCE 2022 in Foz do Iguaçu by theBrazilian Association for Computational Mechanics (ABMEC)
was a milestone in the dissemination of research, exchange ofideas, networking, and human resources development in the field.

T

The event brought together researchers, students, professors, and professionals from various
areas of Computational Mechanics, providing a unique opportunity for knowledge sharing
and experiences. Papers were presented on relevant topics in the field, such as numericalmodeling, simulation and analysis of structures, software development, among others.
In addition, CILAMCE 2022 featured lectures by national and international experts
discussing important and current issues related to Computational Mechanics.
These moments were crucial for exchanging ideas and establishing newpartnerships among researchers and institutions.

Figure 2:
Iguasu Falls

The networking opportunities provided by CILAMCE 2022 were also of great
importance for human resources development in research. Participants had
the opportunity to meet others in the field, establish professional and academic
contacts, and even seek internship or job opportunities. Furthermore, hosting theevent in Foz do Iguaçu allowed participants to experience the natural beauty of the region,
providing a unique cultural exchange. l

ABMEC Awards
o recognize outstanding contributions in computational mechanics, ABMEC hasestablished three annual awards:i.
ABMEC Award:
The ABMEC Award is the highest honor bestowed by ABMEC. It recognizes individuals who
have made exceptional and sustained contributions to the field of computational mechanics
throughout substantial portions of their professional careers. Recipients of this award havealso demonstrated their support for ABMEC through membership and active participation in
the Association, its meetings, and activities. The ABMEC Award is conferred every year, witha maximum of one award presented.

T

iacm expressions 52/23 26

for all inclusions under ABMEC please contact
Suzana Moreira Avila
suzana.avila@gmail.com
ii.
ABMEC Award for Young Scientists:
The ABMEC Award for Young Scientists is presented to young researchers who have made significant contributions to
the field of computational mechanics. Eligible candidates for this award must be 40 years of age or younger at the timeof nomination. The ABMEC Award for Young Scientists is conferred annually, with a maximum of one award given.
iii. ABMEC Award for the Year's Best Doctorate Thesis:
The ABMEC Award for the Year's Best Doctorate Thesis recognizes outstanding doctoral theses in the field ofcomputational mechanics. This award has been conferred every year since 2022.
Each year, a maximum of one award is granted.
These awards serve to acknowledge and celebrate the remarkable achievements and advancements made byindividuals in the field of computational mechanics, while also promoting excellence and innovation within the
ABMEC community. l

Activities in 2023
or the year 2023, ABMEC aims to continue the methods used to disseminate and promote the work of ourresearcher members, as established in our bylaws. One of the main initiatives in this regard is the organizationof the CILAMCE conference, which is an important space for idea exchange, research dissemination, and humanresources development in the field of Computational Mechanics.

F

In this regard, ABMEC is pleased to announce that CILAMCE will be held in Porto, Portugal, from 13 to 16 November
2023, organized by our colleagues Renatl Natal Jorge and Rui Calçada from the Faculty of Engineering of the
University of Porto (FEUP) and Diogo Ribeiro and Jorge Belinha from the Superior Institute of Engineering of Porto(ISEP). This is a great opportunity for our researchers and members to participate in an internationally relevant event,with the presence of important figures in the field, and present their work to a qualified audience. Additional information
about the conference can be found at www.cilamceporto2023.com. lurthermore, ABMEC will continue to seek publications in reputable and renowned
outlets to disseminate the work of our researchers, in order to encourage andboost research in the field of Computational Mechanics. CILAMCE is an important
platform for this dissemination, but other initiatives will also be considered to ensurethat the research results of our members are widely recognized and shared.

F

To this end, in order to disseminate knowledge and bring the latest advancements in research, ABMEC
proposes the organization of webinars on its YouTube channel throughout the year 2023. These webinars will
be conducted by experts in Computational Mechanics, both national and international, who will present relevant
topics for the academic and industrial community. Subjects such as numerical modeling, simulation andanalysis of structures, software development, and practical applications of Computational Mechanics in various
fields such as civil, mechanical, aerospace, automotive engineering, among others, will be addressed.
The idea is to provide a space for discussion and exchange of experiences among professionals, students,
and researchers, as well as contribute to the dissemination of knowledge and the training of highly qualified
professionals. The webinars will be broadcast live and made available on the ABMEC YouTube channel forlater viewing.
It is worth noting that in March 2023, a general assembly was held in a remote format to present the financial
accountability of the previous board and the financial and fiscal planning for the current year. ABMEC believes
that this initiative will foster research and the development of Computational Mechanics in Brazil, as well as
bring the academic and industrial community closer, expanding access to cutting-edge knowledge. Therefore,
we invite all interested parties to follow the webinar schedule and participate in this important event that willcontribute to the advancement of research in Computational Mechanics.
In summary, for the year 2023, ABMEC reaffirms its commitment to valuing and recognizing researchers in thefield of Computational Mechanics through the organization of the CILAMCE event in Porto, Portugal. We believethat each year the community of researchers in computational methods grows, and it is our mission to offer
opportunities for new researchers and interested individuals to explore new knowledge in this field and present
the results of their work to society. Currently, we are proud to have 250 active members in our association. l
27 iacm expressions 52/23

he French Computational Structural Mechanics Association (CSMA) encouraged
and launched in 2016 its section of young researchers, called CSMA Juniors.
The range of actions of this section is large but the main goals arei) to facilitate exchanges and collaborations among the young generation(< 40 years old) of the CSMA;ii) to propose scientific activities which are useful and unique for young researchers &iii) to help CSMA in its activities (such as social networking) and to promote to young
researchers. The section is driven by a committee comprising 9 young
researchers, which is renewed by half every two years. The president of thebureau is automatically a co-opted member of the European Young Investigator
Committee at ECCOMAS.

TThe junior board of theFrench Computational
Structural Mechanics
Association

To this end, the junior office has gradually become an experimental group for testing
new formats of scientific mediation and animation of a academic society of young
researchers, conducive to the emergence of new practices in a context of extremechanges in recent years in the face of the climatic challenges of our time.
A major activity of the board is undoubtedly the organization of an annual two-day
workshop dedicated to the young generation of CSMA (including PhD students,
post-docs, and junior researchers with permanent position). It is worth noting thatthe participation of more experienced researchers to these events is also highly
supported to foster the connection between juniors and seniors. Every year, several
specific and original activities with unconventional formats are proposed, whichmake the workshop a privileged place for scientific exchanges between the young
generation of CSMA.

Figure 1:
The world scale hackathon
at the 2020 WCCM
organized by thejunior CSMA

For the past 6 years, this annual workshop has brought together between 60 and 80
people and definitely highlights the dynamism of the CSMA junior. Six workshops
have been organized each year at different sites in France (Giens, Gif-sur-Yvette,
Porquerolles, Paris,...) where some activities have now become a trademark of thejunior bureau :- the hackathon, where teams of young researchers have to solve a computation
problem in just a few hours (the hackathon
organized as part of the 2020 WCCM World
Congress lasted 24 hours worldwide(figure 1 left). The final objective of the 2022
hackathon is to implement a triangular meshcapable of handling concave geometries(figure 2 below).

Figure 2:
Young researchers team-working on the 2022 hackathon- collaborative work on scientific projects : for example in 2022, 18 scientificproposals were submitted and evaluated by three parallel juries, giving rise to
new ideas and original research activities.
The last 2023 workshop brought us all together in Paris on the CNAM site (figure 3),
and saw a number of new proposals for activities, including a team theatrical game toraise awareness and prepare future candidates for research and teaching positions
iacm expressions 52/23 28

for all inclusions under CSMA please contact
David Néron
david.neron@ens-paris-saclay.fr

Figure 3:
Participants of the CSMA
junior workshop in Parisin March 2023
and associated competitions.
Participants were bothcandidates and membersof a fictitious, yet realistic,
jury, to raise awareness ofthe exercise, ans was great
success ! (figure 4)
Last but not least,
discussions took place
between the assembly
and a round table of experts in the field of ecological transition, to discuss theevolution of the profession of researcher in engineering and scientific computing in
the light of the fundamental transitions awaiting us due to climate deregulation: green
engineering, de-growth, slowing down the pace of life, etc...

Figure 4:Team theatrical game

The Junior Board is now preparing for its next workshop, which will take place on theweekend of May 17, 2024, in Porquerolles, France, with a host of new ideas to ensurethat our community can continue to meet and exchange ideas! See you soon!
follow us on our social media :byJérémie GIRARDOT
President of the CSMA
Juniors Committee

little focus on the next CSMA event :The next French Congress on computational structural mechanics, organized by the CSMA association, will be heldon 13-17 May 2024 in the beautiful Giens peninsula (on the French Riviera). This event is organized every two
years, and it gathers both researchers and industrialists for discussions on key scientific topics in the field.
For more information, please visit: https://csma2024.sciencesconf.org/. l
29 iacm expressions 52/23

conference diary planner
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/th

4 - 7 Sept 2023 PCM-CMM 2023 - 25 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 Sept 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/nd

24 - 27 Sept 2023 2 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

25 - 29 Sept 2023 HFSS 2023 International Conference on Highly Flexible Slender Structures
Venue:

Rijeka, Croatia

Contact:

http://hfss.uniri.hr/

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/

22 - 25 Oct 2023 ACM 2023 - Advances in Computational Mechanics Celebrating the 80th Birthday of T.J.R. Hughes
and CFSI 2023 - Computational Fluid-Structure Interaction: Frontiers in Methods and Applications
Venue:

Austin, Texas

Contact:

https://sites.google.com/usacm.org/acm2023/home

13 - 16 Nov 2023 XLIV CILAMCE - Ibero-Latin American Congress on Computational Methods in Engineering
Venue:

Porto, Portugal

Contact:

https://cilamce.com.br/

22 - 24 Nov 2023 MORTech 2023 – 6th International Workshop on Model Reduction Techniques
Venue:

Paris, France

Contact:

https://mortech2023.sciencesconf.org/

13 - 16 Jan 2024 CACSE - 2nd Conference of the Canadian Association for Computational Science and Engineering
Venue:

Banff, Canada

Contact:

https://www.wccm2024.org/

th22 - 23 Jan 2024 SACAM 13 – 13 South African Conference on Computational and Applied Mechanics
Venue:

Stellenbosch, South Africa

Contact:

htthttp://saam.africa/th

13 - 17 May 2024 CSMA 2024 – 16 National Symposium on Structural Calculation
Venue:

Giens, Franace

Contact:

https://csma2024.sciencesconf.org/

Contact:

http://www.csme-scgm.ca/conferences

26 - 29 May 2024 CSME International Congresses
Venue:Toronto, Canadath3 - 7 June 2024 9 European Congress on Computational Methods in Applied Sciences and Engineering
Venue:

Lisbon, Portugal

Contact:

https://eccomas2024.org/,th21 - 26 July 2024 WCCM/PANACM - 16 World Congress on Comp Mechanics & 4th PANACM Congress
Venue:

Vancouver, Canada

Contact:

https://www.cacse-accsg.ca/

7 - 10 Dec 2025 9th APCOM 2025 - Asia Pacific conference on Computational Mechanics
Venue:
30

Brisbane, Australia

Contact:

https://web.aeromech.usyd.edu.au