股骨有限元分析赋材料属性的方法

发布时间：2018-10-31 12:44

【摘要】：将12侧股骨上段标本进行高速CT薄层扫描,在Mimics10.0中进行三维重建,在Ansys中进行体网格划分。对照组在Mimics10.0中根据灰度值将三维模型材料属性分为2种(密质骨及松质骨);试验组材料属性等分为10,20,50,100,200,400种后赋予材料属性,在Ansys中进行力学分析并采集三维模型全部单元力学测量数值;对分析数据进行统计学处理。结果显示,12侧股骨上段标本均成功进行有限元分析。标本1,5,6,7,9,10的对照组与各试验组差异均有显著性意义(P0.05),标本2,3,4,8,11,12的对照组与试验组差异均无显著性意义(P0.05)。各试验组之间差异均无显著性意义(P0.89)。结果提示,传统方法将骨骼分成密质骨及松质骨2种材料属性,不能满足个性化骨骼有限元分析的要求,将骨骼赋予10种材料属性即可达到有限元分析的要求。
[Abstract]:High-speed CT thin layer scanning was performed on 12 upper femur specimens, 3D reconstruction was performed in Mimics10.0, and volumetric mesh division was carried out in Ansys. In the control group, according to the grayscale value, the 3D model material attributes were divided into two types (dense bone and cancellous bone) in Mimics10.0. The material properties of the test group were divided into 1020 / 50100200400 kinds, and then the mechanical analysis was carried out in Ansys and all the unit mechanical measurement values of the 3D model were collected, and the analysis data were processed statistically. The results showed that 12 upper femur specimens were successfully analyzed by finite element method. There was significant difference between the control group and the experimental group (P0.05), but there was no significant difference between the control group and the experimental group in the control group and the experimental group (P0.05). There was no significant difference between each group (P 0.89). The results suggest that the traditional method can not meet the requirements of individualized finite element analysis of bone by dividing bone into dense bone and cancellous bone, and the requirement of finite element analysis can be achieved by assigning 10 kinds of material properties to bone.
【作者单位】：武汉大学中南医院康复医学科;武汉大学中南医院骨科;华中科技大学力学系;武装警察部队福建总队医院骨科;解放军南京军区福州总医院骨科研究所;
【分类号】：R318.08

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