Prediction of fatigue life of a notched body by the local stress-strain State. Part 3. Allowing for stress and strain gradients

被引：3
|
作者：
Fomichev P.A. [1 ]
机构：
[1] Kharkov Aviation Institute, Kharkov
来源：
Strength of Materials | 2000年 / 32卷 / 4期
关键词：
Aluminum; Fatigue; Aluminum Alloy; Fatigue Life; Strain Amplitude;
D O I：
10.1023/A:1026696316228
中图分类号：
学科分类号：
摘要：
We propose a method for calculating the fatigue life of bodies with stress concentrators prior to the fatigue-crack initiation. It is based on the energy criterion of fracture. Energy dissipated in a notch is taken as a determining parameter. The method allows the fatigue life of notched bodies under regular symmetrical loading to be predicted from the cyclic strain and fatigue characteristics of the material, as obtained in tests of smooth specimens. We analyze the influence of absolute dimensions of a stress concentrator on the fatigue life and propose relationships for calculating the gradients of dissipated energy and the residual strain amplitude. The data we obtained are compared with the test results for notched specimens of 30KhGSA steel and D16AT and AMtsM aluminum alloys. © 2000 Plenum Publishing Corporation.
引用
收藏
页码：316 / 322
页数：6
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