JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) ›› 2017, Vol. 52 ›› Issue (5): 31-36.doi: 10.6040/j.issn.1671-9352.0.2016.541

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Creep experiments study on lumbar intervertebral disc under different loading conditions

YANG Xiu-ping1,2, LUAN Yi-chao1,2, 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:2016-11-25 Online:2017-05-20 Published:2017-05-15

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Abstract: In order to study the effects of loading conditions on the creep properties of lumbar disc, considering different compression stress and loading rate, creep experiments with fresh porcine lumbar intervertebral disc were implemented by an optimized digital image correlation(DIC)technique. The creep constitutive model was established. The results show that creep curves of the intervertebral disc showed exponential rule change under the compression stress; creep strain increased with the increase of stress as the same loading rate; the larger the loading rate, the smaller the creep strain under the same stress. The constitutive equation of intervertebral disc established by using three-parameter viscoelastic model had good correlation with the experimental results. It can predict the creep properties of intervertebral disc. The research results provide a theoretical basis for further study of viscoelastic properties of human intervertebral disc in clinical.

Key words: intervertebral disc, stress, loading rate, creep, constitutive model

CLC Number: 

  • R318.01
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