B403 損傷力学解析による生体吸収性複合材料の力学的挙動評価(生体材料)

概要

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Bioactive ceramics/poly-L-lactide (PLLA) composites have been expected as a material for the bone fracture fixations. In this study, the effects of strain rates on the mechanical behavior of β-tricalcium phosphate (β-TCP)/PLLA composites with three different β-TCP contents was clarified analytically. Analysis based on micromechanics and damage mechanics were conducted to predict the stress-strain curves at the strain rates ranging from 10^<-4> to 10^<-1>[/s]. Critical energy release rate associated, G_c, with debonding between β-TCP and PLLA became larger with strain rate. Predictions of tensile stress-strain curves using G_c values fitted with 15wt% specimens were in good agreement with the experimental results of 5 and 10 wt% specimens.
社団法人日本機械学会の論文
2008-09-22