Composite Engineering Laboratory
Tokyo Metropolitan University

Satoshi KOBAYASHI
Department of Mechanical Engineering,
Graduate School of Science and Engineering,Tokyo Metropolitan University
1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, JapanCOMPOSITE ENGINEERING LABORATORY
Satoshi KOBAYASHI (Associate Professor)(Representative of Japan Domestic Committee ISO TC58 and TC220)

Yoshiyuki KOBAYASHI , PhD Student (MOD)Masato SAKAGUCHI, PhD Student
5 Master Course Students
2 Undergraduate Students*Oct. 2013

Research Areas:
Biomedical Composites
Thermoplastic-based CFRP
Environmentally-Friendly Composites(Composite Cylinders)Biomedical Composites
・Bioabsorbable Composites
Poly(L-lactic Acid) (PLLA)
and Bioactive Ceramics Reinforced PLLA
Strengthen by Orientation Control of Molecular Chain
Improvement in Interfacial Strength between Filler and Matrix
Micro-Damage Mechanical Model
Analytical Model for Bio-Absorption
Strain Rate Dependency
5 mm

5 mm

Tricalcium Phosphate / Hydroxyapatite Composites
Sintering Additives
Near-Net Shape Manufacture for Medical-Devices
Bone-Like Apatite Layer

Thermoplastic-based CFRP-1
Micro-Braiding TechniqueMatrix1mmCarbon Fiber
Micro-Braided Yarn (MBY)

Darcy's Lawur  k dPμ drEq. Continuity

 u  0μ  R 2  R0  R 2  R02  Pmdt   k  2 ln R   4 R 
Degree of Impregnation I  1  R 0

2

Degree of Impregnation [%]Effect of Molding Condition on Impregnation Behavior
100
80
60

Theoretical 8MPa40

Experimental 8MPa
Theoretical 12MPa

20

Experimental 12MPa

002

46Holding Time [min]810Thermoplastic-based CFRP-2
Pull-Winding with Micro-Braided Yarn
Composite Cylinder
DieResin Impregnation
through Tapered PathMandrelSliderMBY

Environmental-Friendly Composites
Continuous Plant Fiber Reinforced
Naturally-derived Plastics (Alternatives to GFRP )Hemp Fiber/Poly(Lactic Acid) Composites (Micro-Braiding)
Textile Specimen (Maximum Stress:40MPa)(a) N=0, N/Nf=0(b) N=840, N/Nf=0.24 (c) N=2,165, N/Nf=0.62(d) N=3,425, N/Nf=0.97

10mm
Damage behavior under fatigue loading consists of fiber/matrix de-bondings
associated with loosening of fiber yarns.

Testing Facilities and Equipments
Universal Testing Machine (50kN, Shimadzu)
Universal Testing Machine (10kN, Shimadzu)
Fatigue Testing Machine (10kN, Shimadzu)  2
Micro Hardness Testing Machine (Resolution 20mN, Shimadzu)
Injection Molding Machine (Clamping Force 70kN,Nissei Plastics)
Batch-Type Kneader (64cc, Imoto)  2
Single Screw Extruder (L/D=20, f=14mm, Imoto)Hot-Press System (with Cooling System, 100kN, Imoto)Hot-Press System (100kN, self-made)Furnace for Sintering (1250°C, Yamato)a wide variety of Furnace...

Acquisition, Monitoring and Simulation
Motion Capture Microscope (24000fps, VW-5000, Keyence)Gel Permeation Chromatography System (Shimadzu)
Differential Scanning Calorimeter (DSC-60, Shimadzu)
Thermal Mechanical Analyzer (TMA-60, Shimadzu)
FT-IR with ATR System (IRPrestige-21, Shimadzu)
Acoustic Emission Monitoring System (NF)Soft X-ray System (M-100X, SOFTEX)
Polarizing Microscope (Shimadzu)* High-Speed Tensile Testing Machine, SEM with EDS and EBSD,and XRD
are also available. (common use)Calculation Code: ANSYS, Solidworks and Moldflow