JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) ›› 2018, Vol. 53 ›› Issue (3): 77-81.doi: 10.6040/j.issn.1671-9352.0.2017.264

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Finite element simulation of relaxation properties on lumbarintervertebal disc under compression

LUAN Yi-chao1,2, YANG Xiu-ping1,2*, ZHANG Jing-jing1,2, LIU Qing2, ZHANG Chun-qiu2   

  1. 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

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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

CLC Number: 

  • R318.01
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