摘要
背景:有限元数值模拟力学实验方法是对人体进行生物力学结构研究的有效手段。目的:建立正常6岁健康儿童肱骨的三维有限元模型。方法:使用某6岁儿童志愿者的人体CT数据,导入到Mimics10.01软件中,应用阈值分割的方法进行肱骨三维重建。运用Geomagic Studio 12.0对模型表面进行表面优化处理及曲面片的划分,然后使用TrueGrid软件进行网格划分,最后对其进行材料属性赋值,完成有限元模型的构建。施加边界条件及约束,模拟肱骨的三点弯曲试验,输出模拟结果。结果与结论:建立完成的肱骨有限元模型包括3024个节点,8节点六面体单元1875个,实验分别加载0.01m/s和3m/s的动态载荷,肱骨中部均发生断裂,载荷-位移曲线与尸体试验结果近似。模拟结果显示,儿童肱骨的有限元模型仿真结果与尸体试验结果较为接近,有限元仿真法可以很好的模拟人体骨骼的物理特性。
BACKGROUND：Mechanical experiment of finite element numerical simulation is the effective method to research the biomechanical structure of human body. OBJECTIVE：To establish the three-dimensional finite element model of a normal 6-year-old child’s humerus. METHODS：CT images of a 6-year-old child volunteer were imported to the Mimics 10.01 software. The threshold segmentation method was used to rebuild the humerus three-dimensional model. The surface optimization treatment and surface patches dicision were performed on the surface of the model with Geomagic Studio 12.0 software. Then the mesh generation was completed in the software TrueGrid. Final y, the material properties were set and the finite element model was completed. The boundary conditions and constrains were exerted to simulate the three-point-bending test of humeurs. After the simulation, the results were outputted. RESULTS AND CONCLUSION：The humerus finite element model included 3 024 nodes and 18 758 nodes-hexahedron elements. The 0.01 m/s and 3 m/s dynamic loads were loaded respectively, then the central humerus fracture occurred and the load-displacement curve was close to the cadaver test results. The simulation results show that the simulation results of children humerus finite element model are close to the cadaver’s test, and the finite element simulation method can simulate the physical properties of the human skeleton very well.
出处
《中国组织工程研究》
CAS
CSCD
2013年第30期5472-5476,共5页
Chinese Journal of Tissue Engineering Research
关键词
骨关节植入物
数字化骨科
肱骨
儿童
有限元模型
三点弯曲试验
载荷-位移
生物力学分析
bone and joint implants
digital orthopedics
humerus
children
finite element model
three-point bending test
load-displacement
biomechanical analysis
