中国组织工程研究 ›› 2026, Vol. 30 ›› Issue (15): 3753-3759.doi: 10.12307/2025.880

• 骨与关节有限元分析Finite element analysis of bones and joints •    下一篇

不同松质骨体积分数影响股骨颈骨折裂纹扩展的有限元分析

杜传佳1,焦  姣2,周继和3,4,王  帅3,刘国辉3,王  杨1,尚画雨3,王慧明5,张晓沛6   

  1. 成都体育学院,1运动训练学院,3运动医学与健康学院,四川省成都市   641418;2香港浸会大学,运动及健康科学系,香港特别行政区   999077;四川省八一康复中心(四川省康复医院),4康复工程科,5放射科,四川省成都市   611130;6武汉体育学院,研究生院,湖北省武汉市   430079
  • 接受日期:2025-04-12 出版日期:2026-05-28 发布日期:2025-11-05
  • 通讯作者: 周继和,硕士,教授,成都体育学院运动医学与健康学院,四川省成都市 641418;四川省八一康复中心(四川省康复医院)康复工程科,四川省成都市 611130
  • 作者简介:杜传佳,男,1991年生,四川省巴中市人,汉族,成都体育学院在读博士,主要从事生物损伤力学相关研究。
  • 基金资助:
    四川省自然科学基金项目(2023NSFSC1524),项目负责人:尚画雨

Influence of different trabecular bone volume fractions on crack propagation in femoral neck fractures: a finite element analysis

Du Chuanjia1, Jiao Jiao2, Zhou Jihe3, 4, Wang Shuai3, Liu Guohui3, Wang Yang1, Shang Huayu3, Wang Huiming5, Zhang Xiaopei6   

  1. School of Sports Training, 3School of Sports Medicine and Health, Chengdu Sport University, Chengdu 641418, Sichuan Province, China; 2Department of Sports and Health Sciences, Hong Kong Baptist University, Hong Kong Special Administrative Region 999077, China; 4Department of Rehabilitation Engineering, 5Department of Radiology, Sichuan Bayi Rehabilitation Center (Sichuan Provincial Rehabilitation Hospital), Chengdu 611130, Sichuan Province, China; 6School of Graduate, Wuhan Sports University, Wuhan 430079, Hubei Province, China
  • Accepted:2025-04-12 Online:2026-05-28 Published:2025-11-05
  • Contact: Zhou Jihe, MS, Professor, School of Sports Medicine and Health, Chengdu Sport University, Chengdu 641418, Sichuan Province, China; Department of Rehabilitation Engineering, Sichuan Bayi Rehabilitation Center (Sichuan Provincial Rehabilitation Hospital), Chengdu 611130, Sichuan Province, China
  • About author:Du Chuanjia, Doctoral candidate, School of Sports Training, Chengdu Sport University, Chengdu 641418, Sichuan Province, China
  • Supported by:
    Natural Science Foundation of Sichuan Province, No. 2023NSFSC1524 (to SHY)

摘要:

文题释义:

内聚力模型牵引-分离准则:用于描述材料界面在外加载荷作用下渐进失效过程的力学模型准则,广泛应用于模拟裂纹萌生与扩展。该准则通过定量描述界面牵引力-分离位移的关系,揭示界面从黏合状态渐进损伤演化至完全失效的全过程。
裂纹扩展:指材料在外部载荷作用下裂纹尖端渐进损伤演化的过程,通常表现为裂纹长度、深度或宽度增加。裂纹扩展受材料微观结构、应力状态、载荷条件及环境因素等多重影响,其机制涉及裂纹尖端局部应力场变化、能量释放率增加,以及材料断裂韧性降低和塑性变形能力衰减等因素。

摘要
背景:股骨颈骨折是老年人群中常见且具有高度危害性的骨折类型,其发生率随着年龄增长而显著增加。目前,股骨颈骨折的损伤机制尚未完全明确,尤其是在力学表征、裂纹萌生及失效机制等方面。
目的:采用有限元法分析不同松质骨体积分数对股骨颈裂纹扩展的影响,为深入探析股骨颈骨折的力学机制提供理论支持。
方法:将1例健康志愿者的股骨近端CT数据导入Mimics 19.0进行三维重建,构建含有皮质骨、松质骨股骨近端模型,导入ABAQUS/CAE 2021中赋予材料参数,并使用随机批量删除单元Python脚本,构建35%,30%,25%和20%松质骨体积分数股骨近端有限元模型,结合内聚力模型分析在2 mm轴向位移载荷作用下股骨颈骨折的力学响应及其损伤机制。
结果与结论:①与35%松质骨体积分数模型相比,20%松质骨体积分数模型的承载力下降10.02%,表明松质骨体积分数减小会削弱股骨颈的力学性能,增加骨折风险;②剪切失效单元/总失效单元最大比值均在90%以上,高速轴向冲击载荷下剪切失效主导股骨颈骨折的形成;③结果表明,松质骨体积分数减小明显削弱了股骨颈的力学性能,增加骨折风险;高速轴向冲击载荷下股骨颈骨折机制以剪切失效为主。


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

关键词: 股骨颈, 松质骨体积分数, 骨质疏松症, 骨折, 有限元法, 生物力学, 内聚力模型, 内聚力模型牵引-分离准则, 裂纹扩展

Abstract: BACKGROUND: Femoral neck fractures are among the most common and severe fractures in the elderly, with incidence rates rising sharply as age advances. At present, the injury mechanism of femoral neck fractures remains incompletely understood, specifically regarding the mechanical characterization, crack initiation, and failure mechanisms.
OBJECTIVE: To analyze the effect of different trabecular bone volume fractions on femoral neck crack propagation using finite element analysis, and to provide theoretical support for in-depth analysis of the mechanical mechanism of femoral neck fracture.
METHODS: CT data of the proximal femur from a healthy volunteer were imported into Mimics 19.0 for three-dimensional reconstruction, creating a model that includes both cortical and trabecular bone. This model was then imported into ABAQUS/CAE 2021, where appropriate material properties were assigned. Subsequently, a Python script for random batch deletion was utilized to generate finite element models of the proximal femur with trabecular bone volume fraction of 35%, 30%, 25%, and 20%. Cohesive Zone Model analysis was performed to investigate the mechanical response behaviors and damage mechanisms of femoral neck fractures under a 2 mm axial displacement load.  
RESULTS AND CONCLUSION: (1) Compared with the 35% trabecular bone volume fraction model, the 20% trabecular bone volume fraction model exhibited a 10.02% reduction in load-bearing capacity, indicating that a decrease in trabecular bone volume fraction compromises the mechanical integrity of the femoral neck and increases fracture risk. (2) The maximum ratio of shear failure elements to total failure elements exceeded 90% in all models. Under high-speed axial impact loading, shear failure is the dominant mechanism in the formation of femoral neck fractures. (3) These findings indicate that a decrease in trabecular bone volume fraction significantly weakens the mechanical properties of the femoral neck, thereby increasing the risk of fracture. Furthermore, under high-speed axial impact loading, the mechanism of femoral neck fracture is predominantly characterized by shear failure. 

Key words: femoral neck, trabecular bone volume fraction, osteoporosis, fracture, finite element method, biomechanics, cohesive zone model, cohesive traction-separation law, crack propagation

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