摘要
关节软骨为一由骨胶原和蛋白聚糖固体相和孔隙流体相组成的多孔材料 ,其可以用基于混合物理论的两相多孔介质模型准确描述。作者采用有限元数值方法分析关节软骨围限压缩蠕变和应力松弛问题 ,得到软骨组织在蠕变和应力松弛过程中 ,固体相和流体相的速度、固体相的有效应力以及孔隙压力等随时间的变化规律。所得到的结果可以为人工软骨材料和人工关节的研制提供理论参考 。
Articular cartilage, which is composed with a solid phase of collagen fibers and proteoglycan and a pore fluid phase, can be depicted with two-phase porous medium model based on mixture theory. This paper analyzed the creep and stress relaxation responses of confined compression problems of articular cartilage with the developed finite element method. The obtained responses of velocities of both solid and fluid phases and the effective stresses of solid phase as well as the pore pressures during the creep and stress relaxation processes of articular cartilage tissues under confined compression can be used as a theoretical reference for man-made cartilage materials, and behave important significance for the research in bio-mechanical engineering area.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2003年第6期138-141,共4页
Journal of Chongqing University
关键词
关节软骨
数值模拟
蠕变
应力松弛
articular cartilage
numerical simulation
creep
stress relaxation
