摘要
飞机结构中一些用作检查的开口常常设计为椭圆孔,椭圆孔边三维裂纹应力强度因子的计算是该类结构损伤容限分析的关键技术。应用组合法思想构造了椭圆孔边裂纹的权函数,给出片条合成法求解含椭圆孔边三维角裂纹应力强度因子的求解方法,计算了椭圆孔边角裂纹受远方拉伸情况下的应力强度因子,研究了椭圆孔曲率半径对应力强度因子的影响,给出可供工程参考的结果和结论。
The hatches of the inspection are usually designed with elliptic holes in airplane structures, so the computation of the stress intensity factor of three dimensional cracks at elliptic holes is pivotal for damage tolerance analysis of these structures. In this paper the weight function of crack at elliptic holes is given by applied compounding method. Stress intensity factor＇s formula of corner crack, applied the slice synthesis method, is gained. Stress intensity factor of corner crack at elliptic holes under remote tension is computed. At the same time, research how the elliptic hole radius of curvature affects the stress intensity factor. Stress intensity factor decreases along with radius of curvature increases. Some results and conclusions which are of practical value are given in this paper.
出处
《航空学报》
EI
CAS
CSCD
北大核心
2007年第2期328-331,共4页
Acta Aeronautica et Astronautica Sinica
关键词
组合法
片条合成法
角裂纹
应力强度因子
权函数
椭圆孔
compounding method
slice synthesis method
corner crack
stress intensity factor
weight function method
elliptical hole
作者简介
谢伟（1978-）男，博士研究生。主要研究方向：结构疲劳、损伤容限与新的数值计算方法。E-mail：nwpuxiewei@mail．nwpu．edu．cn。
通讯作者：黄其青 E-mail：Huangqq@nwpu．edu．cn。
