Influence of stress ratio on residual stress evolution near cold-expanded hole due to low-cycle fatigue by crack compliance data

被引：4

作者：

Chernov, A., V ^{[1
]}

Eleonsky, S., I ^{[1
]}

Pisarev, V. S. ^{[1
]}

机构：

[1] Cent Aerohydrodynam Inst, 1 Zhukovsky St, Zhukovskii 140180, Moscow Region, Russia

来源：

FRATTURA ED INTEGRITA STRUTTURALE-FRACTURE AND STRUCTURAL INTEGRITY | 2021年 / 55期

关键词：

Metal-composite joints; Cold hole expansion; Residual stress intensity factor; Residual stress; INTENSITY FACTORS; EXPANSION; FRACTURE;

D O I：

10.3221/IGF-ESIS.55.13

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Modified version of the crack compliance method is used for determination of stress intensity factor (SIF) related to narrow notches emanating from cold-expanded holes. These notches are inserted at different stages of low-cycle fatigue under constant external load. It is shown how residual SIF values, generated by residual stress field influence, can be separated from total experimental SIF values. Residual SIF values, obtained at different stage of low-cycle fatigue with the same stress range Delta s = 350 MPa but different stress R = -0.4 and R = -1.0, provide quantitative description of residual stress evolution near cold-expanded hole. It shown that maximal residual stress relaxation of order 20 per cent occurs at 95 lifetime per cent for both loading programs.

引用

页码：174 / 186

页数：13

共 48 条

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