%0 Journal Article
%T 压缩条件下腰椎间盘松弛特性的有限元仿真<br>Finite element simulation of relaxation properties on lumbarintervertebal disc under compression
%A 栾义超
%A 杨秀萍
%A 张静静
%A 刘清
%A 张春秋&lt
%A br&gt
%A LUAN Yi-chao
%A YANG Xiu-ping
%A ZHANG Jing-jing
%A LIU Qing
%A ZHANG Chun-qiu
%J 山东大学学报（理学版）
%D 2018
%R 10.6040/j.issn.1671-9352.0.2017.264
%X 摘要： 为研究腰椎间盘的松弛特性,考虑非线性多孔弹性性质,采用ABAQUS软件,建立了人体腰椎间盘L3/L4节段的孔隙单元有限元模型,对不同渗透率和不同应变条件下的松弛特性进行仿真。研究结果表明:非线性的渗透率增大了节段的刚度,进而增大了节段的应力;在压缩应变作用下,椎间盘的应力松弛曲线呈指数规律变化,应力随应变增大而增大;纤维环的孔隙压力和有效应力都高于髓核,纤维环背侧的孔隙压力和有效应力均大于腹侧,因此腰椎间盘突出多发生在纤维环背侧。<br>Abstract: In order to study the relaxation properties of intervertebal disc, a poroelastic finite element model of the human spine L3/L4 segments was developed by ABAQUS with considering the nonlinear porous elastic properties, and the relaxation properties with different permeability and under different strain conditions were calculated. The results show that nonlinear permeability rises the stiffness of the segments and increases the stress, the stress relaxation curve presents the index under compression strain. And the stress increases with the rise of strain. The pore pressure and the effective stress of the annulus fibrosus(AF)are higher than those of the nucleus pulposus. The pore pressure and the effective stress of the posterior AF are greater than those of the anterior AF, so the lumbar disc herniation occurs mostly on the posterior AF
%K 松弛特性
%K 椎间盘
%K 多孔弹性
%K 有限元分析
%K &lt
%K br&gt
%K intervertebral disc
%K porous elasticity
%K finite element analysis
%K relaxation property
%U http://lxbwk.njournal.sdu.edu.cn/CN/10.6040/j.issn.1671-9352.0.2017.264