3D Finite Element Analysis of a Man Hip Joint Femur under Impact Loads  

作　　者：YU Xue-zhong GUO Yi-mu LI Jun ZHANG Yun-qiu HE Rong-xin 

机构地区：[1]Second Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310009, China [2]Department of Engineering Mechanics, Zhejiang University, Hangzhou 310027, China

出　　处：《Chinese Journal of Biomedical Engineering(English Edition)》2007年第1期1-7,共7页中国生物医学工程学报（英文版）

摘　　要：Objective： The biomechanical characters of the bone fracture of the man femoral hip joint under impact loads are explored. Methods ：A biosystem model of the man femoral hip joint by using the GE （ General Electric） lightspeed multi-lay spiral CT is conducted. A 3D finite element model is established by employing the finite element software ANSYS. The FE analysis mainly concentrates on the effects of the impact directions arising from intense movements and the parenchyma on the femoral hip joint on the stress distributions of the proximal femur. Results：The parenchyma on the hip joint has relatively large relaxation effect on the impact loads. Conclusion：Effects of the angle δ of the impact load to the anterior direction and the angle γ of the impact load to the femur shaft on the bone fracture are given;δ has larger effect on the stress and strain distributions than the angle γ,which mainly represents the fracture of the upper femur including the femoral neck fracture when the posterolateral femur is impacted, consistent with the clinical resuits.Objective: The biomechanical characters of the bone fracture of the man femoral hip joint under impact loads are explored. Methods:A biosystem model of the man femoral hip joint by using the GE (General Electric) lightspeed multi-lay spiral CT is conducted. A 3D finite element model is established by employing the finite element software ANSYS. The FE analysis mainly concentrates on the effects of the impact directions arising from intense movements and the parenchyma on the femoral hip joint on the stress distributions of the proximal femur. Results:The parenchyma on the hip joint has relatively large relaxation effect on the impact loads. Conclusion:Effects of the angle δ of the impact load to the anterior direction and the angle γ of the impact load to the femur shaft on the bone fracture are given;δ has larger effect on the stress and strain distributions than the angle γ, which mainly represents the fracture of the upper femur including the femoral neck fracture when the posterolateral femur is impacted, consistent with the clinical results.

关 键 词：Femoral hip joint Impact loading 3 D finite element analysis 

分 类 号：R683.42[医药卫生—骨科学] R318.01[医药卫生—外科学]