Creep experimental study on the lumbar intervertebral disk under vibration compression load
The intervertebral disk cushions the load generated by human activity and absorbs energy to keep the spine moving steadily. Vibration condition is one of the important causes of disk degeneration. Creep experiments using the sheep lumbar intervertebral disk were carried out under vibration compressi...
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Published in | Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine Vol. 233; no. 8; p. 858 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
England
01.08.2019
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Abstract | The intervertebral disk cushions the load generated by human activity and absorbs energy to keep the spine moving steadily. Vibration condition is one of the important causes of disk degeneration. Creep experiments using the sheep lumbar intervertebral disk were carried out under vibration compression. Regularities of the strain of the disk with time were obtained and compared with those of static load. The influence of vibration frequency and time on the creep properties of the intervertebral disk was analyzed. An intervertebral disk three-parameter solid creep constitutive model considering vibration factors was established and the parameters in the model were identified. The results show that the strain of the lumbar intervertebral disk exhibits an exponential relationship with time and is unrelated to static compression or vibration load. Under the same vibration amplitude, the creep increases with vibration frequency and the relationship between them is nonlinear. The vibration frequency has a significant effect on the strain. The creep rate decreases gradually with time and is obviously influenced by vibration frequency at low vibration amplitudes. The creep prediction results obtained using the constitutive model with the time-varying material parameters are in good agreement with the experimental results. The two elastic moduli in the model decrease with time and the viscosity coefficient increases with time. |
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AbstractList | The intervertebral disk cushions the load generated by human activity and absorbs energy to keep the spine moving steadily. Vibration condition is one of the important causes of disk degeneration. Creep experiments using the sheep lumbar intervertebral disk were carried out under vibration compression. Regularities of the strain of the disk with time were obtained and compared with those of static load. The influence of vibration frequency and time on the creep properties of the intervertebral disk was analyzed. An intervertebral disk three-parameter solid creep constitutive model considering vibration factors was established and the parameters in the model were identified. The results show that the strain of the lumbar intervertebral disk exhibits an exponential relationship with time and is unrelated to static compression or vibration load. Under the same vibration amplitude, the creep increases with vibration frequency and the relationship between them is nonlinear. The vibration frequency has a significant effect on the strain. The creep rate decreases gradually with time and is obviously influenced by vibration frequency at low vibration amplitudes. The creep prediction results obtained using the constitutive model with the time-varying material parameters are in good agreement with the experimental results. The two elastic moduli in the model decrease with time and the viscosity coefficient increases with time. |
Author | Liu, Qing Luan, Yichao Cheng, Xiaomin Zhang, Chunqiu Yang, Xiuping |
Author_xml | – sequence: 1 givenname: Xiuping orcidid: 0000-0002-8770-1090 surname: Yang fullname: Yang, Xiuping organization: 2 National Demonstration Center for Experimental Mechanical and Electrical Engineering Education, Tianjin University of Technology, Tianjin, P.R. China – sequence: 2 givenname: Xiaomin surname: Cheng fullname: Cheng, Xiaomin organization: 2 National Demonstration Center for Experimental Mechanical and Electrical Engineering Education, Tianjin University of Technology, Tianjin, P.R. China – sequence: 3 givenname: Yichao surname: Luan fullname: Luan, Yichao organization: 2 National Demonstration Center for Experimental Mechanical and Electrical Engineering Education, Tianjin University of Technology, Tianjin, P.R. China – sequence: 4 givenname: Qing surname: Liu fullname: Liu, Qing organization: 1 Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, School of Mechanical Engineering, Tianjin University of Technology, Tianjin, P.R. China – sequence: 5 givenname: Chunqiu surname: Zhang fullname: Zhang, Chunqiu organization: 1 Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, School of Mechanical Engineering, Tianjin University of Technology, Tianjin, P.R. China |
BackLink | https://www.ncbi.nlm.nih.gov/pubmed/31203788$$D View this record in MEDLINE/PubMed |
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Snippet | The intervertebral disk cushions the load generated by human activity and absorbs energy to keep the spine moving steadily. Vibration condition is one of the... |
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SubjectTerms | Animals Biomechanical Phenomena Compressive Strength Intervertebral Disc - physiology Intervertebral Disc - physiopathology Intervertebral Disc Displacement - physiopathology Lumbar Vertebrae - physiology Lumbar Vertebrae - physiopathology Materials Testing - instrumentation Materials Testing - methods Sheep Vibration Weight-Bearing |
Title | Creep experimental study on the lumbar intervertebral disk under vibration compression load |
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