不同加载条件下的腰椎间盘蠕变实验研究
发布时间：2018-12-30 10:22
【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。
[Abstract]:In order to study the effect of loading conditions on the creep performance of lumbar intervertebral disc, the creep experiment of fresh porcine lumbar disc was carried out by using non-contact digital image correlation technique, considering different compression stress and loading rate. The creep constitutive model is established. The results show that the creep curve of intervertebral disc changes exponentially when compressive stress is applied, the creep strain increases with the increase of stress at the same loading rate, the higher the loading rate is, the smaller the creep strain is when the stress is the same. The constitutive equation of intervertebral disc established by the three-parameter viscoelastic model has a good correlation with the experimental results, which can predict the creep performance of the disc. The results provide a theoretical basis for the further study of viscoelastic properties of human intervertebral disc.
【作者单位】： 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;天津理工大学机械工程学院;
【基金】：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)
【分类号】：R681.5
本文编号：2395443
[Abstract]:In order to study the effect of loading conditions on the creep performance of lumbar intervertebral disc, the creep experiment of fresh porcine lumbar disc was carried out by using non-contact digital image correlation technique, considering different compression stress and loading rate. The creep constitutive model is established. The results show that the creep curve of intervertebral disc changes exponentially when compressive stress is applied, the creep strain increases with the increase of stress at the same loading rate, the higher the loading rate is, the smaller the creep strain is when the stress is the same. The constitutive equation of intervertebral disc established by the three-parameter viscoelastic model has a good correlation with the experimental results, which can predict the creep performance of the disc. The results provide a theoretical basis for the further study of viscoelastic properties of human intervertebral disc.
【作者单位】： 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;天津理工大学机械工程学院;
【基金】：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)
【分类号】：R681.5
【相似文献】
相关期刊论文 前2条
1 孙庆;吴丹凯;吴丹华;;腰椎松质骨应力松弛蠕变实验研究[J];试验技术与试验机;2003年Z1期
2 ;[J];;年期
，本文编号：2395443
本文链接：https://www.wllwen.com/yixuelunwen/waikelunwen/2395443.html
最近更新
教材专著
