膝关节运动过程的应力数值模拟

目的观察膝关节关节面在整个运动过程中的应力、应变分布范围、大小及变化规律。方法利用有限元数值模拟方法对行走过程中膝关节关节面应力、应变情况进行分析。结果与结论行走过程中关节面产生应力、应变随时间推移而增加，并且变化规律近似的服从抛物线变化。通过对不同体重的人在行走时膝关节面上产生的应力分析得出，体重对关节面上的应力的大小并不产生重大影响，体重带来的应力差异仅占总应力的10％。

Stress numerical simulation of the movement course of knee joint

Objective To observe the distribution in range, size and the regulation of change. Methods Use the finite element method to research the knee joint surface stress and strain of the process of human walking. Rusults and Conclusion The stress and strain produced on joint surface change and increase over time in walk and the change conform to parabola approximately. Through analyzing the stress that the person of different weight produces on the joint surface in the knee while walking, the weight has smaller influence on the amount of the stress on the joint surface ,and 10% that the stress difference that the weight brings only accounts for the total stress.