摘要
本文用分离式Hopkinson杆 (SHBM ) (应变率为 70 0 1/s)对人的密质骨进行了撞击实验研究 ,得出了应力 时间、应变 时间、应变率 时间及应力 应变等曲线。用一维波传播理论分析实验数据。结果表明即使在高应变率下 ,人的密质骨也具有非线性粘弹性材料的特性。据此可得人密质骨的冲击特性可用三参数粘弹性力学模型描述。同时得出了高应变率下人密质骨的极限应力和残余应变值。
Dynamic response of human cortical bone was studied using split Hopkinson bar method(SHBM) at high mechanical strain rate(700 1/s). Curves of stress vs. Time, strain vs. Time, strain rate vs. Time and stress vs. Strain were all recorded, One dimensional wave propagation theory was used to analyze the data. The results showed that human cortical bone behaved as a non linear viscoelastic material even at high strain rate. This suggests refinement of both the constitutive relationship and the fracture criterion for human cortical bone. Scanning electron microscopy(SEM) was used to study the fracture surfaces for correlation with the dynamic data.
出处
《中国生物医学工程学报》
CAS
CSCD
北大核心
2001年第2期170-174,169,共6页
Chinese Journal of Biomedical Engineering
基金
国家自然科学基金资助项目
