中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (11): 1725-1730.doi: 10.3969/j.issn.2095-4344.0170

• 数字化骨科 digital orthopedics • 上一篇    下一篇

基于Hypermesh 14.0和LS-DYNA的老年转子间骨折有限元建模分析

何祥鑫1,林梓凌2,李鹏飞1,杜根发1,孙文涛1,陈心敏1,梁子毅1   

  1. 1广州中医药大学,广东省广州市    5104052广州中医药大学第一附属医院,广东省广州市   510405
  • 出版日期:2018-04-18 发布日期:2018-04-18
  • 通讯作者: 林梓凌,博士,主任医师,广州中医药大学第一附属医院,广东省广州市 510405
  • 作者简介:何祥鑫,1989年生,江西省赣州市人,汉族,广州中医药大学在读硕士,主要从事中医药防治骨伤科疾病的研究。
  • 基金资助:

    国家自然科学基金(81673996);广东省科技计划(2016A020215141)

Finite element analysis of intertrochanteric fractures in older adults based on Hypermesh 14.0 and LS-DYNA software

He Xiang-xin1, Lin Zi-ling2, Li Peng-fei1, Du Gen-fa1, Sun Wen-tao1, Chen Xin-min1, Liang Zi-yi1   

  1. 1Guangzhou University of Chinese Medicine, Guangzhou 510405, Guangdong Province, China; 2First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510405, Guangdong Province, China
  • Online:2018-04-18 Published:2018-04-18
  • Contact: Lin Zi-ling, M.D., Chief physician, First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510405, Guangdong Province, China
  • About author:He Xiang-xin, Master candidate, Guangzhou University of Chinese Medicine, Guangzhou 510405, Guangdong Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81673996; the Science and Technology Program of Guangdong Province, No. 2016A020215141

摘要:

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文题释义:
股骨三维模型建立:目前实验研究中主要的建模方法有直接建模法、坐标点建模、组织切片建模、基于医学图像的建模、DICOM数据直接建模法。其中基于骨骼真实CT数据的DICOM数据建模方法因其数据来源真实、准确,建模过程缺少人为干预,三维模型仿真度高等特点,越发受到重视,成为有限元研究中最常用的几何模型建立方法。
连续损伤力学:与疲劳分析理论、断裂力学一起属于破坏力学的范畴,主要是为弥补断裂力学在材料微观劣化研究上的不足而发展起来的固体力学的一个分支,其研究包括微观裂纹萌生过程及材质劣化现象,及宏观裂纹出现后的扩展过程。
 
摘要
背景:目前运用有限元法分析股骨转子间骨折多局限于应力分布情况,多类型转子间骨折有限元断裂模型国内外未见报道。
目的:运用Hypermesh 14.0及LS-DYNA模拟股骨近端侧方跌倒受力建立多型转子间骨折有限元断裂模型,评估模型效果,分析转子间骨折的力学发生机制。
方法:选取1例单侧老年转子间骨折患者,获取健侧髋部CT影像资料,导入Mimics 19.0建立股骨近端几何模型,经Geomagic studio 2013光滑等处理,Hypermesh 14.0划分网格,设置材料参数,确定边界条件并赋予载荷参数,导入LS-DYNA求解器进行分析运算,在HyperView中查看运算结果。
结果与结论:①股骨近端的应力分布情况与既往研究高度符合,在持续剪切应力作用下获得Evans Ⅰ型转子间骨折模型,调整载荷后共获取6型骨折模型;②结果发现,基于Hypermesh14.0和LS-DYNA的有限元法可以较好的模拟转子间骨折断裂情况,剪切应力在转子间骨折的发生中起重要作用,以上结论可为转子间骨折防治提供一定的实验参考。

中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程
ORCID:0000-0002-2612-2263(何祥鑫)

关键词: 骨科植入物, 数字化骨科, 老年转子间骨折, 连续损伤力学, LS-DYNA软件, 有限元分析, 国家自然科学基金

Abstract:

BACKGROUND: At present, finite element analysis can be used to judge intertrochanteric fractures, but mostly limited in the distribution of stress. Finite element model of various intertrochanteric fractures has not been reported in detail.

OBJECTIVE: To build various types of intertrochanteric fracture models with Hypermesh 14.0 and LS-DYNA software to simulate the falling-induced external force on proximal femur, and to evaluate the effect of models, and to analyze the biomechanical mechanism of intertrochanteric fractures.
METHODS: Normal side CT image data of one case of elderly intertrochanteric fracture were collected and imported into Mimics software to establish the proximal femur geometric models, were then analyzed and operated by LZ-DYNA solver after imported into Geomagic studio 2013 and Hypermesh 14.0 for smoothing and meshing. Before analysis, the material parameters were set, the boundary conditions were confirmed, and given the loading parameters. The operating results were checked in Hyper View.
RESULTS AND CONCLUSION: (1) The distribution of stress of proximal femur exactly matched to the previous study. EvansⅠtype intertrochanteric fracture model was obtained under continuous shear stresses, and six types of fractures were obtained by adjusting the load. (2) These results manifest that based on the Hypermesh 14.0 and LS-DYNA software, the finite element can well simulate the intertrochanteric fractures, and shear stress plays an important role in intertrochanteric fractures, which can provide experimental basis for the prevention and treatment of intertrochanteric fractures.

中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程

Key words: Femur, Fractures, Bone, Finite Element Analysis, Tissue Engineering

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