Material Production by Combustion Synthesis
NameSHINTOMI Masahito

E-mailshintomi@numazu-ct.ac.jp

Job Title

ProfessorDegree

Dr. Eng.

Academic Society and Association

Combustion Society of Japan
Combustion synthesis, Self-propagating High-temperature Synthesis,

Research Keywords
Technical Fields andpossible for collaboration

The Japan Society of Mechanical Engineers,

Flame synthesis
Topics・・

Material production by SHS
Flame synthesis of diamond film

Details of the Research ThemeCombustion synthesis can produce various useful materials with rapidity and at a low cost. More than 500 kinds ofmaterials, including carbides, borides, silicides, nitrides, intermetallics, and complex composites, can be synthesized by thecombustion synthesis method. Diamond films can also be produced by flame synthesis method.

Mg powder

MixtureCompaction

Compacted sample

Si powder

Mg2Si ProductFigure 1

Figure 2

Combustion synthesis

SHS process (Mg2Si formation)

C2H2/O2 flame for diamond deposition and the resulting deposits

Study on Fretting Fatigue Strength of Aluminum Alloy
Name

Tomohisa NISHIDA

E-mailnishida@numazu-ct.ac.jp

Job Title

Professor

DegreeDoctor (Engineering)

The Japan Society of Mechanical Engineering
Academic Society and Association

Research Keywords

Technical Fields and Topics possiblefor collaboration

The Society of Material Science
Quality Engineering Society
Fretting fatigue, Fretting fatigue crack, Surface Treatment,
In-situ observation
・ Elucidation of fretting fatigue mechanism
・ In-situ observation of fatigue crack
・ Improvement of fretting fatigue strength by surface treatment

Details of the Research Theme

Surface Treatment for Fretting Fatigue Strength Improvement of Aluminum Alloy
Background
Aluminum alloy, which has superior mechanical properties, low cost, light weight and reliability, has been

widely used for automobile parts, aircraft parts, air and oil compressors and other components. However,aluminum alloy has problems of surface damage due to its softness and corrosion. Therefore, improvement ofsurface properties is required in practical applications. Fretting is a small relative slip that occurs between twosurfaces that come into contact with each other, such as the joints of mechanical structural parts and the sliding
part of the shaft. It is well known that the fatigue strength of a component can be significantly reduced by fretting.
In this study, plain fatigue and fretting fatigue strength tests of aluminum alloy (JIS A7N01) specimens withsurface treatments (shot peening, burnishing and solid lubricant film etc.) were carried out using anelectromagnetic fatigue testing machine.
Results
Fretting fatigue limit of untreated specimen was significantly low, which was about one fourth of the plain

fatigue strength. Fretting fatigue strength of the specimen surface-treated with shot peening was slightly higher
than that of the untreated specimen. The fretting fatigue strengths for solid lubricant film and burnishing havebeen remarkably increased compared to that of the untreated specimen. However, the fatigue limit for solid
lubricant film was almost same as that of untreated specimen. From the in-situ SEM observation of fretting
fatigue process, it was found that burnishing with smooth surface and high compressive residual stresseffectively delayed the fretting fatigue crack nucleation and crack propagation. It was also found that solid
lubricant film with low frictional coefficient effectively delayed them.

a) Fatigue test machine with SEMb） Fretting crack(Nf=7×103）
SEM in-situ observation of fretting crack behavior.

Control of Manufacturing System・PID・Adaptive Control
NameJob Title

MITANI Yuuichiroh
Professor

Academic Society and Association
Research Keywords

E-mailmitani@numazu-ct.ac.jp

DegreeDr. of Engineering

The Japan Society of Mechanical Engineering,
The Society of Instrument and Control Engineering
Motion control, Programmable Logic Controller, PID Control, Adaptive Control

Technical Fields andpossible for collaboration

Topics・・・・

Manufacturing control system by using programmable logic controller
Magnetic levitation control
Temperature and humidity controlSound and vibration control

Details of the Research ThemeThe recent interest is control of the manufacturing system, such as “Overhead traveling crane”, “High-speed motioncontrol”, Temperature and humidity control” by using Programmable Logic Controller (PLC). High accuracy conveyancecontrol system without sway motion is required to achieve high-efficiency of crane motion control. Non-linearity andhigher-order unmodeled dynamics can be challenging problems. The effectiveness has been confirmed by experimentationof “Non-contact conveyance by using Magnetic Levitation (MagLev) control system. The controller of the system wasdesigned by applying the new control designing method; Finite Number Frequency Response (FNFR) modeling techniqueand Linear Matrix Inequality (LMI) method to cope with the difficulty of the modeling of controlled object. On the other
hand, temperature and humidity control are also strongly required in many manufacturing systems. However, they are onlycontrolled separately by PID controller in the current automation factory. One of the non-linear control systems, which
is “Model Predictive Control (MPC)” system is useful control method for the temperature and humidity simultaneouscontrol system. The brand-new PLC, “Sysmac NJ” produced by OMRON corporation is adopted to implement the control
system because Sysmac NJ has the special function which can use the controller designed by MATLAB / Simulink.

Controlled object
 Overhead traveling crane Non-contact conveyance Temperature / Humidity

Challenging problems

Required specification

 High-accuracy
 High-speed

Control approach Sway motion

 FNFR modeling Non-linearity

 LMI

 Unmodeled dynamics

 MPC

Fracture toughness of adherends bonded with adhesives
Name

KIM Hyun-Bum

E-mailhyunbum.kim@numazu-ct.ac.jp

Job Title

Associate Professor

DegreeDoctor (Engineering)

Academic Society and Association

The Japan Society of Mechanical Engineering

Research Keywords

Adhesives, Aluminum alloy, Composites, Fracture

Technical Fields andpossible for collaboration

Topics・・・・

Adhesion & adhesives
Composite materials
Fracture mechanics
Mechanics of materials

Details of the Research Theme
To measure fracture toughness of adherends bonded with adhesives for automotive and aircraft industries.
Background

Adhesives are used to bond similar and dissimilar materials because of their many advantages over conventionalbonding methods. Th purpose of this study is to measure the fracture toughness of adhesively bonded joints using double
cantilever beam (DCB) tests and end-notched flexure (ENF) tests.
Test methods and Results

The shape and dimensions of the DCB specimen and the crack extension resistance-crack length curve under Mode I
loading are shown in Fig. 1 and Fig. 2, respectively. It was observed that a rising R-curve because of brittle behaviors of
the adhesive bulk specimens as shown in Fig. 2.
The shape and dimension of the ENF specimen and the energy release rate-crack length curve under Mode II loading
are also shown in Fig. 3 and Fig. 4, respectively. The results showed that the energy release rate values increased
gradually with increasing crack length.

Crack extension resistance,
GI [Jm-2]

200

150

10070

Fig 1. Shape and dimensions of DCB specimen.

110

Energy release rate, GII [Jm-2]

Fig. 2 R-curve
8000
6000
4000
20000.02

Fig 3. Shape and dimensions of ENF specimen.

8090100
Crack length, a [mm]

0.03
0.04
Crack length, a [m]0.05

Fig. 4 GII vs crack length Conclusions
Fracture toughness of adherends bonded with adhesives were measured using DCB and ENF tests under staticloadings.

Improvement of material of cooling device to improve die cast production efficiency
Name

KITA Madoka

Job Title

E-mailkita@numazu-ct.ac.jp

DegreeMasterAcademic Society and Association

MechaniResearch Keywords

ThermalTechnical Fields and Topics possible
for collaboration

・・・

Details of the Research Theme
Applying heat expertise to industry

Fluid

Thermal
Fluid
Industrial technolgy