广布疲劳损伤加筋板结构剩余强度分析  

RESIDUAL STRENGTH ANALYSIS OF STIFFENED PANELS WITH WIDESPREAD FATIGUE DAMAGE

作　　者：李仲[1] 刘亚龙[1] 王生楠[1] 葛森[2] 吕国志[1] 

机构地区：[1]西北工业大学航空学院,西安710072 [2]中国飞机强度研究所,西安710065

出　　处：《机械强度》2006年第5期747-750,共4页Journal of Mechanical Strength

摘　　要：广布疲劳损伤(widespread fatigue damage,WFD)对老龄飞机是非常重要的问题。文中用工程方法和有限元方法计算含广布疲劳损伤(WFD)加筋板的剩余强度,完成3种类型9件加筋板的剩余强度试验。计算结果和试验结果比较吻合,能满足工程精度的要求。结果还表明,WFD明显降低了加筋板的剩余强度。Widespread fatigue damage （WFD） is an important concern in aging aircraft. Residual strength of stiffened panels with widespread fatigue damage was evaluated by engineering approach and finite element method respectively. 9 stiffened panels with three types of damage were tested for residual strength. The evaluated results were in agreement with experiment results and could be used in engineering practice with the acceptable accuracy. The work shows that WFD can significantly reduce the residual strength of stiffened panels.

关 键 词：加筋板 广布疲劳损伤 剩余强度 应力强度因子 

分 类 号：V215.6[航空宇航科学与技术—航空宇航推进理论与工程]