不同加载条件下的腰椎间盘蠕变实验研究

doi:10.6040/j.issn.1671-9352.0.2016.541

山东大学学报（理学版） ›› 2017, Vol. 52 ›› Issue (5): 31-36.doi: 10.6040/j.issn.1671-9352.0.2016.541

不同加载条件下的腰椎间盘蠕变实验研究

杨秀萍^1,2,栾义超^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:2016-11-25 出版日期:2017-05-20 发布日期:2017-05-15
通讯作者: 张春秋(1968— ),男,博士后,教授, 研究方向为生物力学. E-mail:zhang_chunqiu@126.com E-mail:yhp420@sina.com
作者简介:杨秀萍(1962— ),女,硕士,教授,研究方向为生物力学. E-mail:yhp420@sina.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(81272046,11672208)

Creep experiments study on lumbar intervertebral disc under different loading conditions

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

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

摘要/Abstract

摘要： 为研究加载条件对腰椎间盘蠕变性能的影响,以新鲜猪腰椎间盘为研究对象,采用非接触式数字图像相关技术,考虑不同压缩应力及加载速率,对椎间盘进行蠕变实验,并建立蠕变本构模型。结果表明:施加压缩应力时,椎间盘蠕变曲线呈指数规律变化;相同加载速率下,蠕变应变随着应力的增大而增大;应力相同时,加载速率越大,蠕变应变越小;利用三参数粘弹模型建立的椎间盘本构方程与实验结果具有较好的相关性,该能够预测椎间盘的蠕变性能。研究结果为临床进一步研究人体椎间盘粘弹特性提供理论基础。

关键词: 椎间盘, 应力, 本构模型, 蠕变, 加载速率

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

中图分类号:

R318.01

杨秀萍,栾义超,张静静,刘清,张春秋. 不同加载条件下的腰椎间盘蠕变实验研究[J]. 山东大学学报（理学版）, 2017, 52(5): 31-36.

YANG Xiu-ping, LUAN Yi-chao, ZHANG Jing-jing, LIU Qing, ZHANG Chun-qiu. Creep experiments study on lumbar intervertebral disc under different loading conditions[J]. JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE), 2017, 52(5): 31-36.

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不同加载条件下的腰椎间盘蠕变实验研究

Creep experiments study on lumbar intervertebral disc under different loading conditions

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