摘要
根据临床医学的统计结果,建立了一个比较完整详细的T12-L2胸腰椎节段的脊椎有限元模型,并赋予模型带有失效准则的非线性材料属性来研究不同姿势下脊椎爆裂骨折的生物力学原理.垂直压缩载荷由一个刚体球垂直碰撞脊椎模型产生.在碰撞之前,脊椎模型分别处于直立、前屈、后伸的姿势下,由此获得3种姿势下的骨折过程和评估爆裂骨折程度的纵向高度、横向宽度和关节突接触力的评价参数.研究结果表明,后伸姿势下椎管狭窄程度最大,爆裂骨折程度最严重.
Based on the statistical results of clinical medicine,a complete and detailed spine finite element model of the T12-L2 thoracolumbar segment was established,and the nonlinear material properties with failure criteria were given to the model to study the biomechanism of spinal burst fractures in different postures.The vertical compressive load was generated by a rigid ball vertically colliding with the thoracolumbar model.Before the collision,the thoracolumbar model was in the upright,forward flexion,and backward extension postures,thereby obtaining the fracture process in three postures and the evaluation parameters of longitudinal height,lateral width,and articular process contact force to evaluate the degree of burst fracture.It was found that in the backward extension posture,the canal stenosis was the most serious in burst fracture.
作者
李武杰
郭立新
LI Wu-jie;GUO Li-xin(School of Mechanical Engineering&Automation,Northeastern University,Shenyang 110819,China)
出处
《东北大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2020年第4期534-540,共7页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(51875096).
关键词
有限元方法
脊椎胸腰节段
爆裂骨折
碰撞载荷
生物力学
finite element method
thoracolumbar segment
burst fracture
impact load
biomechanics