断裂力学中的光弹性和最小二乘配点混合法

Hybrid Method of Photoelasticity and Least Squares Collocation Techniques in Fracture Mechanics

本文将光弹性实验和加权残值法中的最小二乘配点法相结合,得到一种求解平面复合型裂纹问题的混合法。这种方法可以很方便地对裂纹体进行应力分析,解得应力强度因子。作者构造了一个试函数,并对具体实例进行了实验和计算。

The paper describes a hybrid method for determination of the stress intensity factors and the whole field stresses which combines both the classical photoelasticity and the modern method of weighted residuals. The bounary conditions given from th: uhotoelastic experiments are used in solving the problems. The experiments of me photoelasticity and the numerical techniques of the least-squares collocation method hav; been performed on two typical spesimens of the opening-mode and mixed-mode by using the hybrid method. Comparison between the experimental and theoretical results shows that errors are within the general engineering requirement.