髋关节假体的三维有限元分析与材料结构设计

我们设计了具有复合结构的假体模型,采用ANSYS软件对髋关节假体进行了静态三维有限元分析,对比了材料的弹性模量、泊松比及复合结构半径比对假体应力分布的影响,通过对假体受到的正应力、剪切应力和合力情况的综合分析,提出了假体设计的新方案,即采用复合结构,使用模量低、泊松比大的外层材料和有足够力学性能的内层材料,并尽量增大复合结构的半径比。

Three-dimensional Finite-Element Analysis and Biomechanical Design of Femoral Prosthesis

A new total femoral prosthesis with composite structure was designed, and the femoral prostheses under static state were analyzed with ANSYS software (version 5.7). The effects of elastic modulus, Poisson's ratio and the ratio of the inner radius over the outer radius on the stress distribution were investigated. Through a comprehensive analysis of the experimental results of positive stress and shear stress on the prostheses, a new design of the femoral prosthesis was put forth as follows:choose the composite materials of which the outer layer has low elastic modulus and great Poisson's ratio, the inner layer has enough mechanic capability, and the increase in the ratio of the inner radius over the outer radius is as great as possible.