JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) ›› 2016, Vol. 51 ›› Issue (11): 93-98.doi: 10.6040/j.issn.1671-9352.0.2016.247

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Mechanics response analysis of lumbar intervertebral disc based on Biot theory

ZHANG Jing-jing1,2, YANG Xiu-ping1,2, 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:2016-05-05 Online:2016-11-20 Published:2016-11-22

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Abstract: In order to consider the effect of fluid-structure coupling in lumbar disc, based on Biot theory, a finite element model of L3/L4 segment of normal human lumbar intervertebral disc was created. The mechanics responses of intervertebral disc under different loads were analyzed, the distribution and the comparison curves of pressure and stress of the different parts of the intervertebral disc were obtained. The results showed that outer annulus pressure was about 15% that of the inner layer and the outer maximum stress was about 4.3 times that of nucleus pulposus under axial compressed load; pressure increased linearly with the axial load increased at the same rates and stress increased at the different rates; the outer annulus stress increased the most obvious. When axial compressed and torsion loads were combined, the holistic annulus stress level was the largest and easiest to break.

Key words: Biot theory, lumbar intervertebral disc, finite element analysis, mechanical response

CLC Number: 

  • R318.01
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