确定应力强度因子的光弹性法与焦散线法  

Comparison between the Techniques of Transmitted Caustics and Photoelasticity in Determining Stress Intensity Factors

作　　者：张忠平[1] 孙中禹[1] 孙强[1] 

机构地区：[1]空军工程大学,西安710038

出　　处：《应用力学学报》2001年第3期100-104,共5页Chinese Journal of Applied Mechanics

摘　　要：以光弹性法及焦散线法的基本原理为基础 ,对两种方法在确定应力强度因子方面进行了比较。发现对于纯Ⅰ型裂纹问题 ,光弹性法的精度低于焦散线法的精度 ;对于Ⅰ Ⅱ混合型裂纹问题 ,就张开型应力强度因子而言 ,光弹性法的精度低于焦散线法的精度 ,而就滑移型应力强度因子而言 。Based on the principles of transmitted caustics as well as photoelasticity, the two techniques in determining stress intensity factors (SIF) are compared. It is found that, for mode I cracks, the precision of photoelasticity technique is hi gher than that of caustic method. And for I-II mixed cracks, the precision of p hotoelasticity technique is lower than that of caustic method in determining ope ning mode SIF, but as for sliding mode SIF, the conclusion is contrary to the fo rmer.case.

关 键 词：应力强度因子 光弹性法 焦散线法 

分 类 号：O346.1[理学—固体力学] O348.1[理学—力学]