A method for stress intensity factor calculation of infinite plate containing multiple hole-edge cracks

作者：Zhao Jinfang^*; Xie Liyang; Liu Jianzhong; Zhao Qun

来源：International Journal of Fatigue, 2012, 35(1): 2-9.

DOI：10.1016/j.ijfatigue.2011.06.001

• Multiple site damage
• Complex variable function
• Equivalent crack
• Analytical method
• Stress intensity factor

Multiple site damage is the occurrence of small fatigue cracks at several sites within aging aircraft structures. Focusing on this typical structure, an analytical method for calculating the stress intensity factor of an infinite plate containing multiple hole-edge cracks was introduced in this paper. The properties of complex variable functions are used to evaluate the stress function. The approximate superposition method is applied to solve stress intensity factor problems on multiple holes. The equivalent crack is introduced to modify the method. Some numerical examples of an infinite plate containing two hole-edge cracks are examined by the method. By comparing the analytical and finite element analysis results it was realized that the analytical results are accurate and reliable. This modified analytical method is easier to apply than some traditional analytical methods and can provide stress intensity factor solutions for an infinite plate containing a random distribution of multiple hole-edge cracks.

• 出版日期2012-2
• 单位中国航发北京航空材料研究院; 沈阳工程学院; 东北大学