Interval dynamic reliability analysis of mechanical components under multistage load based on strength degradation

被引:17
作者
Jiang, Changjie [1 ]
Liu, Xintian [1 ]
Wang, Xiaolan [1 ]
Wang, Xu [1 ]
Su, Shengchao [1 ]
机构
[1] Shanghai Univ Engn Sci, Sch Mech & Automot Engn, Shanghai, Peoples R China
关键词
cumulative damage; dynamic reliability; loading sequence; strength degradation model; RESIDUAL STRENGTH; DAMAGE ACCUMULATION; LIFE PREDICTION; FATIGUE; MODEL; COMPOSITE; TESTS;
D O I
10.1002/qre.2749
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
To further study the law of strength degradation, the residual strength degradation model is established based on the definition of fatigue damage, considering the interaction of various uncertain factors and time factors in service environment. Combined with equivalent damage model, a nonlinear cumulative damage model is proposed, which takes the interaction among loading loads into account and improves the accuracy of calculation. Additionally, the equivalent transformation of multistage load is studied using interval theory. According to the interval dynamic nonprobability reliability prediction model, a dynamic reliability analysis of the interval model is carried out. Dynamic reliability of the component is analyzed under multistage load accumulation damage to verify the effectiveness of the method.
引用
收藏
页码:567 / 582
页数:16
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