Faculty Profiles - KOBAYASHI Koichi

Papers - KOBAYASHI Koichi

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Strength Criterion for Bovine Tibial Trabecular Bone under Multiaxial Stress Reviewed

KOBAYASHI Koichi, SAKAI Jun, SAKAMOTO Makoto

Theoretical and Applied mechanics 50 91 - 96 2001.10

Mechanical Behaviour of Bovine Trabecular Bone Subjected to Impact Compressive Load

KOBAYASHI Koichi, TANABE Yuji, HARA Toshiaki

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A 63 ( 616 ) 2624 - 2630 1997.12

Language：Japanese Publisher：The Japan Society of Mechanical Engineers

Dynamic compressive behaviour of bovine trabecular bone was investigated. Compression tests on cylindrical specimens of bovine distal femurs were carried out using the split-Hopkinson pressurebar (SHPB) technique at strain rates ranging from 100 to 700 s-1. Quasi-static compression tests were also performed using an Instron-type materials testing machine at strain rates of 2&times;10-4 and 2&times;10-3 s-1. Stiffness and ultimate strength were greater at greater apparent density and at higher strain rate. Both stress relaxation and creep functions were determined based on stress-time and strain-time relations obtained by the SHPB tests. Relaxation time and retardation time had no correlation with apparent density. The three-element standard linear solid model was then validated by these functions. The elastic spring stiffness of the model, E1, had a strong positive correlation with apparent density, while the elastic spring stiffness, E2, and the viscosity coefficient, &eta;, showed less correlation with apparent density. No significant differences in the relaxation and retardation times, the elastic spring stiffnesses, E1, E2, and the viscosity coefficient, &eta;, were observed between the specimens with and without marrow.

DOI： 10.1299/kikaia.63.2624

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Mechanical Properties of Articular Cartilage Under Confined and Unconfined Compressions

KOBAYASHI Koichi

日本臨床バイオメカニクス学会誌 = Proceedings of ... Annual Meeting of Japanese Society for Clinical Biomechanics and Related Research 17 343 - 348 1996.10

Tempertaure dependence of viscoelastic properties of bovine compact bone

ONISHI Masafumi

日本臨床バイオメカニクス学会誌 = Proceedings of ... Annual Meeting of Japanese Society for Clinical Biomechanics and Related Research 16 433 - 436 1995.10

Anisotropy in the dynamic non-linear viscoelastic properties of bovine compact bone Reviewed

Yuji Tanabe, Koichi Kobayashi

Journal of Materials Science: Materials in Medicine 5 ( 6-7 ) 397 - 401 1994.6

IDENTIFICATION OF THE DYNAMIC PROPERTIES OF BONE USING THE SPLIT-HOPKINSON PRESSURE-BAR TECHNIQUE Reviewed

Y TANABE, K KOBAYASHI, M SAKAMOTO, T HARA, H TAKAHASHI

BIOMATERIALS MECHANICAL PROPERTIES 1173 127 - 141 1994

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Papers - KOBAYASHI Koichi