具裂纹的桁架结构系统静强度可靠性分析  

Static Strength Reliability Analysis of Truss Structural System with Crack

作　　者：赵维涛[1] 张卫平[1] 许晓丰[1] 

机构地区：[1]沈阳航空工业学院,辽宁沈阳110136

出　　处：《上海航天》2008年第6期16-19,共4页Aerospace Shanghai

摘　　要：根据具裂纹结构的剩余截面模量和剩余极限应力,分别在屈服与断裂失效条件下建立了元件的安全余量,并以两者串联的失效概率为该元件的失效概率,分析了结构系统的失效过程。算例表明:不同裂纹长度元件的失效形式可不同,结构系统主要失效路径中元件屈服与断裂失效同时存在。认为有裂纹结构的可靠性分析需同时考虑元件的屈服与断裂失效。According to the residual section module and residual ultimate stress of structure system with crack,the safety margin of element was established under the yield failure and fracture failure in this paper.The structural system failure process was analyzed when failure probability of two safety margins in series was served as the failure probability of the element.The results of examples showed that the failure form with different crack length could be different,and failure forms of elements in the significa...

关 键 词：有裂纹结构 结构可靠性 屈服失效 断裂失效 相关性 

分 类 号：V414[航空宇航科学与技术—航空宇航推进理论与工程]