薄壁结构剩余强度预测方法研究进展  

Research Progress on Residual Strength Prediction of Thin-walled Structures

作　　者：赵延广[1] 刘建中[1] 胡本润[1] 陈勃[1] 郭翔[1] 

机构地区：[1]中国航空工业集团公司北京航空材料研究院,北京100095

出　　处：《理化检验（物理分册）》2015年第8期525-534,共10页Physical Testing and Chemical Analysis(Part A:Physical Testing)

基　　金：国家自然科学基金资助项目(11272019);国家自然科学基金重大国际合作资助项目(51010006)

摘　　要：综述了目前比较重要的薄壁结构剩余强度预测方法,介绍了采用应力强度因子、裂纹尖端张开位移δCTOD、裂纹尖端张开角度ψCTOA、内聚力模型参数、能量耗散、临界拉伸应力以及GTN损伤模型等方法预测剩余强度的详细过程,并比较了各种方法在预测薄壁结构剩余强度时的优缺点。此外对整体结构和非整体结构在预测时的一些细节问题也进行了分析,包括多位置损伤、裂纹偏移和分叉、焊接残余应力和强度适配以及粘接结构的问题等。The most important current approaches for residual strength prediction of thin-walled structures were reviewed.The detail process of residual strength prediction by using stress intensity factor,crack tip opening displacementδCTOD,crack tip opening angleψCTOA,cohesive zone model parameters,separation energy,critical tensile stress and Gurson-Tvergaard-Needleman damage model was introduced and discussed with respect to their benefits and limitations for the simulation of plane and stiffened panels.In addition,specific aspects of modern nonintegral and integral structures were addressed.These comprised multi-site damage,crack deviation and branching,welding residual stresses and strength mismatch in material compounds and problems in bonded structures.

关 键 词：薄壁结构 断裂力学 损伤力学 剩余强度 稳定裂纹扩展 

分 类 号：TG115.57[金属学及工艺—物理冶金]