三种生物瓣型面应力的有限元计算  

The Finite Element Computation of Stress on Type Surfaces of Three Bioprostheseis Valves

作　　者：曹震[1] 邹盛铨[1] 廖宏艳[1] 祖正华[1] 

机构地区：[1]重庆大学工程力学系,四川联合大学力学系

出　　处：《重庆大学学报（自然科学版）》1996年第1期46-52,共7页Journal of Chongqing University

基　　金：国家自然科学基金

摘　　要：用有限元数值方法计算了在心室舒张期瓣膜关闭瞬时峰值跨瓣压差作用下的静态应力分布。分别计算了球面、柱面和旋转抛物面型的瓣叶应力分布。结果发现，旋转抛物面型瓣叶的第一主应力和主剪应力分布较优。三种型面的瓣叶应力分布还表现出一些相似的趋势。In this paper the static stress distribution of closed valve during diastole under the peak across valve pressure difference is analyzed with nonlinear finite element method. We analyzed the three shapes i. e.,spherical,cylindrical and rotating paraboloid type valves, respectively as a result of computation, it is suggested that the maximum principal normal and shearing stress for rotating paraboloid type valve are smaller than those for the cylindrical and spherical type valves. It shows that there exist some similarities of the stress distribution among these three type valves.

关 键 词：心脏瓣膜 生物瓣 第一主应力 剪应力 有限元法 

分 类 号：R318.01[医药卫生—生物医学工程] R318.11[医药卫生—基础医学]