猪腰椎间盘不同区域轴向应变分布的实验研究  

Experimental study on axial strain distribution in different regions of porcine lumbar intervertebral disc

作　　者：孙凤菊 杨秀萍 朱松峰 刘清[2] 张春秋[2] SUN Feng-ju;YANG Xiu-ping;ZHU Song-feng;LIU Qing;ZHANG Chun-qiu(Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System,School of Mechanical Engineering,Tianjin University of Technology,Tianjin 300384,China;National Demonstration Center for Experimental Mechanical and Electrical Engineering Education(Tianjin University ofTechnology),School of Mechanical Engineering,Tianjin University of Technology,Tianjin 300384,China)

机构地区：[1]天津理工大学机械工程学院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机电工程国家级实验教学示范中心(天津理工大学),天津300384

出　　处：《天津理工大学学报》2019年第5期39-44,共6页Journal of Tianjin University of Technology

基　　金：国家自然科学重点基金(11432016);国家自然科学基金(11672208,81272046,11802207)

摘　　要：应用数字图像相关(DIC)技术对猪腰椎间盘进行轴向压缩实验,研究正常椎间盘和去除髓核椎间盘不同区域轴向应变的分布及随载荷变化规律.结果表明随着应力的逐渐增加,椎间盘不同区域的轴向应变均随之增加,且变化具有不均匀性.纤维环(AF)在髓核(NP)区的轴向应变增量最大,背侧区次之,腹侧区最小;内侧的轴向应变增量均大于外侧.髓核摘除后,椎间盘腹侧区、NP区和背侧区的应变增加量均大于正常椎间盘,且纤维环内、外侧的应变增加量均大于正常椎间盘.The axial compression experiments of porcine lumbar intervertebral discs were conducted by applying an optimized digital image correlation(DIC)technique and to study the distribution of axial strain in different regions of normal intervertebral discs and nucleus pulpus-removed intervertebral discs and the variation rule with load.The results show that the axial strain of different regions increased with the increase of stresses in two groups,and the variation has non-uniformity.The increase of axial strain of annulus fibrosus(AF)in nucleus pulposus(NP)region was the largest,followed by posterior region,and the smallest in anterior region.The increase of axial strain in inner region was larger than that in outer region.After nucleus pulposus removal,the strain increments of the anterior region,NP region and posterior region of the intervertebral disc was larger than that of the normal intervertebral disc,and the strain increments of the inner and outer AF was larger than that of the normal intervertebral disc.

关 键 词：腰椎间盘 轴向应变 压缩载荷 DIC技术 

分 类 号：R318.01[医药卫生—生物医学工程]