摘要
裂纹尖端应力强度因子的求解是疲劳裂纹扩展分析的关键问题之一。根据断裂力学原理,权函数把载荷条件和几何条件分开考虑,只包含裂纹体几何特征,不受载荷影响。本文采用基于裂纹面位移的规范化解析权函数法和基于多个参考载荷条件的Glinka-Shen通用权函数法分别求解了有限矩形板中心裂纹和边缘裂纹的权函数,并采用格林函数验证了权函数的正确性,为疲劳裂纹扩展预测中应力强度因子确定提供了一种简便、高效的方法。
The stress intensity factor at the crack tip is one of the key problems in fatigue crack propagation analysis.According to the principle of fracture mechanics,the weight function considers the load condition and geometric condition separately,and only includes the geometric characteristics of the crack body,which is not affected by the load.In this paper,the normalized analytic weight function method based on crack surface displacement and Glinka-Shen general weight function method based on multiple reference load conditions are used to solve the weight function of the central crack and edge crack of a finite rectangular plate respectively,and the correctness of the weight function is verified by Green's function,which provides a simple and efficient method for determining the stress intensity factor in fatigue crack propagation prediction.
作者
陈昊
董登科
Chen Hao;Dong Dengke(Aircraft Strength Research Institute of China,Aviation Industry Corporation of China Limited,Xi'an 710065,Shaanxi,China)
出处
《工程与试验》
2022年第2期4-9,共6页
Engineering and Test
