月骨矢状面二维有限元模型的建立及其有限元分析

doi:10.3760/cma.j.issn.1005-054X.2016.01.029

CORC > 北京大学 > 工学院

	月骨矢状面二维有限元模型的建立及其有限元分析; Construction of a two-dimensional finite element model of lunate sagittal plane and its finite element analysis
	杜传超 ; 肖滋润 ; 熊革 ; 任爽 ; 荣起国 ; 张衡
刊名	中华手外科杂志
	2016
关键词	月状骨有限元分析二维有限元模型 MicroCT Lunate bone Finite element analysis MicroCT Two dimensional finite element model
DOI	10.3760/cma.j.issn.1005-054X.2016.01.029
英文摘要	目的建立月骨矢状面的二维有限元模型,并探讨在月骨矢状面上施加轴向应力时应力的分布规律及形变特点.方法运用Micro CT扫描离体的正常月骨标本,将处理后的矢状面图像导入有限元分析软件,建立月骨矢状面的二维有限元模型.在二维有限元模型上均匀地选取9个兴趣区,计算每个兴趣区的第一主应力(S1)、第三主应力(S3)、节点等效应力(SEQV)、平面剪切力(SXY)及纵向位移(UY),比较其大小和方向,并生成月骨矢状面二维有限元模型的形变图、各应力及位移云图.结果建立月骨矢状面的二维有限元模型,分别模拟了其在腕关节中立位、屈曲位和背伸位时的加载和约束情况,探讨了月骨矢状面的应力分布规律和形变特点.发现月骨矢状面近端兴趣区所受的应力大于远端兴趣区所受的应力;月骨矢状面掌侧兴趣区所受的应力大于背侧兴趣区所受的应力;月骨矢状面近端和远端的掌、背侧兴趣区所受的应力分别大于对应的月骨中间兴趣区所受的应力;月骨矢状面远端兴趣区被压向近端,近端中间区域的兴趣区被压向远端,而近端掌侧和背侧兴趣区的纵向位移方向随着腕关节姿势的不同而不同;腕屈曲位和背伸位时各兴趣区的应力和位移明显增加.此外还发现应力集中区域是平面剪切力方向发生变化及轴向位移方向发生变化的主要区域.结论月骨矢状面在施加轴向应力时,其应力分布具有一定的规律,在月骨矢状面近端的掌、背侧及远端的掌、背侧形成4个应力集中区.而且腕关节的姿势可以明显地影响月骨矢状面上所受的应力大小和分布.; Objective To investigate the stress distribution and deformation characteristics of the normal lunate through a two-dimensional sagittal plane finite element model.Methods A normal lunate sample was scanned with MicroCT,and the central sagittal image was chosen for further finite element analysis.The chosen image was processed and imported into the finite element analysis software (Ansys 14.0).A two-dimensional sagittal finite element model of the lunate was established.Then axial pressure was applied on the model,and 9 regions of interest (ROI) were evenly chosen.The finite element analysis was carried out with Ansys 14.0,from which the stress and displacement nephograms were created.In addition,the values of the first principal stress (S1),the third principal stress (S3),shear stress (SXY),Von mises stress (SEQV) and displacement of each ROI (UY) were calculated and compared.Results Stress on the ROIs of the proximal part of the lunate was much higher than that on the distal part,and S1 on the ROIs of the proximal part was less than S3 on them,while S1 on the ROIs of the distal part was higher than S3 on them.The stress on the ROI of the volar part was much higher than that on the ROI of the dorsal part.Both the ROIs of the two ends of the lunate received much higher stress than the ROIs of the middle part.As for the axial trabecular displacement,the distal ROIs were compressed proximally,while the ROIs in the proximal middle part were pushed distally.However,the dorsal and the volar parts of the proximal lunate moved in different directions at different wrist postures.We also found that the stress values and magnitudes of displacement were elevated in flexion and extension.Besides,the stress concentration zones (the proximal volar ROI,the proximal dorsal ROI,the distal volar ROI,and the distal dorsal ROI) had different directions of SXY and UY in different wrist postures.Conclusion When stress is loaded on the model of the normal lunate,four stress concentration zones can be found.The wrist postures can significantly affect the value and distribution of axial stress on the sagittal lunate.; 国家临床重点专科建设项目-手外科; 北京市卫生系统高层次卫生技术人才培养计划; 中文核心期刊要目总览(PKU); 中国科技核心期刊(ISTIC); 中国科学引文数据库(CSCD); 1; 66-70; 32
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/441355]
专题	工学院
推荐引用方式 GB/T 7714	杜传超,肖滋润,熊革,等. 月骨矢状面二维有限元模型的建立及其有限元分析, Construction of a two-dimensional finite element model of lunate sagittal plane and its finite element analysis[J]. 中华手外科杂志,2016.
APA	杜传超,肖滋润,熊革,任爽,荣起国,&张衡.(2016).月骨矢状面二维有限元模型的建立及其有限元分析.中华手外科杂志.
MLA	杜传超,et al."月骨矢状面二维有限元模型的建立及其有限元分析".中华手外科杂志 (2016).