机械科学与技术2012，Vol.31Issue(1)：59-62,4.
整体翼梁止裂筋条对裂纹转折特性的影响分析
Analyzing Effects of Crack-arresting Stringer of Integrated Wing Beam Structure on Crack Turning Characteristics
摘要
Abstract
We establish the FE model of the crack-arresting stringer of the integrated wing beam structure with the finite element software ABAQUS and calculate its stress intensity factors and T-stress.We predict the crack turning angle of the crack-arresting stringer with the first-order maximum tangential stress theory and the second-order maximum tangential stress theory and then compare the prediction results with the experimental results.The comparison results show that the second-order maximum tangential stress theory can predict the sharp turning at the tip of the crack near the crack-arresting stringer more accurately than the first-order one.Then we discuss the effects of the various thicknesses of the wing beam structure on the crack turning.The discussion results show that the crack turning angle increases with increasing stiffness ratio of the crack-suppressing stringer,thus being more effective for arresting the cracks of the integrated wing beam structure.关键词
整体翼梁/T应力/损伤容限/应力强度因子/裂纹扩展轨迹/有限元Key words
integrated wing beam structure/T-stress/crack-arresting stringer/stress intensity factor/crack turning angle/finite element method分类
航空航天引用本文复制引用
殷之平,陈安,黄其青,谢伟..整体翼梁止裂筋条对裂纹转折特性的影响分析[J].机械科学与技术,2012,31(1):59-62,4.
