复杂载荷下含缺陷结构的L_r参量研究  

STUDY ON THE PARAMETER L_r OF STRUCTURE CONTAINING DEFECTS UNDER COMBINED LOADINGS

作　　者：轩福贞[1] 李培宁[1] 郭茶秀[1] 

机构地区：[1]华东理工大学机械工程系,上海200237

出　　处：《机械强度》2001年第1期8-10,共3页Journal of Mechanical Strength

基　　金：国家"九五"科技攻关项目资助!(96 91 8 0 2 0 3)。

摘　　要：鉴于现有Lr 参量处理复杂载荷时的局限性 ,本文从其反映含缺陷结构接近塑性失效程度的物理意义出发 ,基于不同的塑性屈服准则 ,提出了一个新的Lr 参量定义。该定义不仅与原来的定义具有一致性 ,而且适用于复杂的载荷状态 ,具有独特的优越性 ,满足了工程的需要。最后对LrAfter analyzing the limitation of the exiting Lr definition, a new Lr parameter was defined based on different yield criteria and the original sense of the Lr parameter that reflected the state of defected structure approaching the plastic collapse failure mode. The new definition was not only identified with the existing Lr, but also could be used for assessment of the integrity of defected structure under combined loadings, and met the engineering needs. At last, some discussion was presented about the Lr parameter.

关 键 词：失效评定 复杂载荷 Lr参量 含缺陷结构 

分 类 号：TH114[机械工程—机械设计及理论] O213.2[理学—概率论与数理统计]