Investigation of residual stress relaxation in cold expanded holes by the slitting method

被引：15

作者：

Jones, Keith W. ^{[1
]}

Bush, Ralph W. ^{[1
]}

机构：

[1] US Air Force Acad, Dept Engn Mech, Colorado Springs, CO 80840 USA

来源：

ENGINEERING FRACTURE MECHANICS | 2017年 / 179卷

关键词：

Cold expanded hole; Residual stress; Slitting; Stress relaxation; Finite element analysis; FATIGUE-CRACK GROWTH; FASTENER HOLES; EXPANSION; PREDICTION; PROPAGATION; PERFORMANCE; ERROR;

D O I：

10.1016/j.engfracmech.2017.05.004

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Slitting residual stress measurements were made in aluminum 7075-T651 plates with cold expanded holes to investigate residual stress relaxation during cyclic loading. A two-step cutting procedure released large internal moments adjacent the holes to minimize plasticity errors in residual stress measurement. Residual stresses are represented by symmetric Legendre polynomials on opposite sides of the hole and compliance functions found by finite element analysis. Residual stress convergence with Legendre polynomial order is demonstrated, and residual stress measurement uncertainty is estimated. Measured residual stresses were smaller than predicted by finite element analysis. Residual stress relaxation due to cyclic loading was not observed. Published by Elsevier Ltd.

引用

页码：213 / 224

页数：12

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