法医学杂志2011，Vol.27Issue(4)：241-245,5.DOI:10.3969/j.issn.1004-5619.2011.04.001
股骨有限元模型的建立及损伤生物力学验证
Establishment of Femoral 3D Finite Element Model and Validation of Injury Biomechanics
摘要
Abstract
Objective To investigate the feasibility of creating an effective femoral finite element model from medical images of CT scan with Mimics software, and to provide a good model for femoral fracture biomechanics. Methods CT images of femur were obtained from 16-slice spiral CT, which were subsequently imported into Mimics software according to DICOM standard. The 3D femoral finite element model was developed, meshed and assigned with material properties. The feasibility of the model was tested and validated with LS-DYNA in different modes including vertical load of 1 000 N, 3-points bending and side impacts. Results Five hundred twenty-one scanning images were available and reconstructed to create a femoral finite element model consisting of 17 879 nodes and 106 834 tetrahedron elements. The average stress on the femoral neck nodes under vertical load was (3.2097±1.3735) Mpa. Strain-deflection curve in 3-points bending test was consistent with Kennedy's study results. The results of the side impact test were in accordance with the forensic anatomical findings. Conclusion The established model should be applicable to femoral collision biomechanics studies.关键词
法医病理学/生物力学/有限元分析/体层摄影术,螺旋计算机/股骨Key words
forensic pathology/ biomechanics/ finite element analysis/ tomography, spiral computed/ femur分类
社会科学引用本文复制引用
邹冬华,李正东,黄平,刘宁国,陈忆九..股骨有限元模型的建立及损伤生物力学验证[J].法医学杂志,2011,27(4):241-245,5.基金项目
国家自然科学基金资助项目(30872920、81072507) （30872920、81072507）
上海市自然科学基金资助项目(10ZR1431200) （10ZR1431200）
科技部科研院所社会公益研究专项(GY0906、GY1105) （GY0906、GY1105）
