压缩条件下腰椎间盘松弛特性的有限元仿真

doi:10.6040/j.issn.1671-9352.0.2017.264

山东大学学报（理学版） ›› 2018, Vol. 53 ›› Issue (3): 77-81.doi: 10.6040/j.issn.1671-9352.0.2017.264

压缩条件下腰椎间盘松弛特性的有限元仿真

栾义超^1,2,杨秀萍^1,2*,张静静^1,2,刘清²,张春秋²

1. 天津理工大学天津市先进机电系统设计与智能控制重点实验室, 天津 300384;2. 天津理工大学机械工程学院, 天津 300384

收稿日期:2017-05-21 出版日期:2018-03-20 发布日期:2018-03-13
通讯作者: 杨秀萍(1962— ),女,教授, 研究方向为生物力学. E-mail:yhp420@sina.com E-mail:qluanyichao@163.com
作者简介:栾义超(1992— ),男,硕士研究生, 研究方向为机械设计及理论. E-mail:qluanyichao@163.com
基金资助:
国家自然科学重点基金资助项目(11432016);国家自然科学基金资助项目(11672208,81272046)

Finite element simulation of relaxation properties on lumbarintervertebal disc under compression

LUAN Yi-chao^1,2, YANG Xiu-ping^1,2*, ZHANG Jing-jing^1,2, LIU Qing², ZHANG Chun-qiu²

1. Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System, Tianjin University of Technology, Tianjin 300384, China;
2. School of Mechanical Engineering, Tianjin University of Technology, Tianjin 300384, China

Received:2017-05-21 Online:2018-03-20 Published:2018-03-13

摘要/Abstract

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。

关键词: 松弛特性, 椎间盘, 多孔弹性, 有限元分析

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.

Key words: intervertebral disc, porous elasticity, finite element analysis, relaxation property

中图分类号:

R318.01

栾义超,杨秀萍,张静静,刘清,张春秋. 压缩条件下腰椎间盘松弛特性的有限元仿真[J]. 山东大学学报（理学版）, 2018, 53(3): 77-81.

LUAN Yi-chao, YANG Xiu-ping, ZHANG Jing-jing, LIU Qing, ZHANG Chun-qiu. Finite element simulation of relaxation properties on lumbarintervertebal disc under compression[J]. JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE), 2018, 53(3): 77-81.

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压缩条件下腰椎间盘松弛特性的有限元仿真

Finite element simulation of relaxation properties on lumbarintervertebal disc under compression

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