406 金属材料の疲労試験における熱弾性応力解析の検討(OS5-(2)オーガナイズドセッション《ライフサポートにおける工学技術》)

概要

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Metals such as titanium materials and stainless steel are widely using in orthopedic implant devices. In this work, the authors examined the application of thermoelastic stress analysis for fatigue properties of implantable metals. The fatigue test with Ti-6Al-4V alloy and stainless steel was conducted with sine wave at stress ratio (minimum stress/maximum stress) =0.1. The effects of wave frequency and materials on the difference of surface temperature (ΔT) obtained by thermoelastic stress measuring method were examined at various applied stress using Ti-6Al-4V alloy and stainless steel. The AT for Ti-6Al-4V alloy and stainless steel increased with increasing applied stress. Effect of frequency on AT was also small for Ti-6Al-4V alloy and stainless steel. Surface stress calculated with thermoelastic parameter was also close to applied stress. It was clear that thermoelastic stress measuring method is useful for estimation of surface stress of orthopedic implant devices.
2011-08-26