摘要
在传统霍普金森压杆基础上,针对膝关节软骨这种软物质在动态力学性能测试中存在的试样两端应力无法平衡及透射信号弱的问题,提出了相应的改进措施,并采用改进后的分离式霍普金森压杆对猪膝关节软骨进行了不同应变率下的冲击压缩实验,获得了猪膝关节软骨在五种应变率下即500s-1、1000s-1、2000s-1、2700s-1和3500s-1的应力-应变曲线。探讨了猪膝关节软骨在不同应变率下的力学性能、对应变率的相关性和本构关系,为新型人工膝关节假体的设计提供了理论依据。
The dynamic response of porcine knee cartilage in compression is studied using the Kolsky bar technique. We have made modifications to the technique that allow loading of a soft tissue specimen in compression based on traditional split Hopkinson Pressure Bars（ SHPB）. Porcine knee cartilage ’s dynamic stress-strain curves at strain rate of 500 s-1,1000 s-1,2000 s-1,2700 s-1,and 3500 s-1 are obtained by the experiment. This thesis firstly developed a viscoelastic constitutive model to describe the behavior of porcine knee cartilage under quasi-static loadings or high strain-rate loadings. Through experiments and experimental data processing,the parameters of the constitutive have been obtained and well cover the experimental results. Consequently,this study can provide material data to numerical simulation of the behavior of knee cartilage.
出处
《科技通报》
2018年第4期51-54,61,共5页
Bulletin of Science and Technology
基金
浙江大学青年教师交叉研究种子基金项目(JCZZ-2013023)
关键词
固体力学
动态力学性能
SHPB
膝关节软骨
solid mechanics
dynamic mechanical properties
SHPB
porcine knee cartilage
