FRACTOGRAPHIC ANALYSIS OF CRACK-GROWTH AND SHEAR LIP DEVELOPMENT UNDER SIMPLE VARIABLE-AMPLITUDE LOADING

被引：11

作者：

LING, MR

SCHIJVE, J

机构：

[1] Faculty of Aerospace Engineering, Delft University of Technology, Delft, 2629 HS

来源：

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 1990年 / 13卷 / 05期

关键词：

D O I：

10.1111/j.1460-2695.1990.tb00616.x

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Fatigue crack growth experiments were carried out on 2024‐T3 sheet specimens, loaded under simple variable‐amplitude load sequences, including blocks of overload cycles or underload cycles and blocks of low amplitude cycles. The purpose was to study interaction effects by analysing striation measurements and shear lip developments. The striations clearly demonstrate delayed retardation. Shear lip measurements indicate significantly slower crack growth rates if the percentage shear lip increases from zero (no shear lips) to 100% (fully in the shear mode). The significance of incompatible shear lips during variable‐amplitude loading is discussed. The test results are evaluated with relation to interaction mechanisms and the meaning by cycle‐by‐cycle prediction models. Copyright © 1990, Wiley Blackwell. All rights reserved

引用

页码：443 / 456

页数：14

共 19 条

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