新型外固定支架系统-胫骨骨折模型的建立与三维有限元分析

发布时间：2019-01-27 16:22

【摘要】：目的建立新型外固定支架系统在胫骨骨折模型上的有限元模型,分析评价有限元模型建立的可行性及力学分布特点,为进一步的材料结构优化及临床应用提供理论支持。方法利用Mimics17.0软件将新鲜尸体的胫骨CT数据导入并建立胫骨模型,用Hypermesh对模型进行网格划分并导入有限元分析软件ABAQUS6.13,施加轴向载荷后观察Von-Mises应力分布和骨折断端位移情况,通过与生物力学结果对比评价其生物力学特点。结果成功创建了装配体有限元模型,生成548 101个体单元,节点548 101个。最大轴向载荷下骨折断端最大位移为1.16 mm,最大Von mises应力分布点为骨针接触面。结论有限元模型的建立及分析方法能较好地反映该新型外固定支架胫骨骨折系统的生物力学分布情况,可为进一步临床应用提供理论基础。
[Abstract]:Objective to establish the finite element model of a new type of external fixator in tibial fracture model, and to analyze and evaluate the feasibility and mechanical distribution of the finite element model, so as to provide theoretical support for further material structure optimization and clinical application. Methods the tibia CT data of fresh cadavers were imported into the tibia model by Mimics17.0 software and the tibia model was established. The model was meshed with Hypermesh and imported into the finite element analysis software ABAQUS6.13,. The stress distribution of Von-Mises and the displacement of fracture end were observed after applying axial load, and the biomechanical characteristics were evaluated by comparing with the biomechanical results. Results the assembly finite element model was successfully established, and 548,101 individual units were generated, with 548,101 nodes. The maximum displacement of fracture end is 1. 16 mm, under the maximum axial load. The maximum Von mises stress distribution point is the bone needle contact surface. Conclusion the establishment and analysis of finite element model can better reflect the biomechanical distribution of tibial fracture system with the new external fixator, and can provide a theoretical basis for further clinical application.
【作者单位】：北京航天总医院;河北省衡水市哈励逊国际和平医院;
【基金】：北京市丰台区卫生计生系统科研项目(No:2015-19)
【分类号】：R683.42

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