On the tolerance to short cracks under fatigue and SCC conditions

被引：1

作者：

Pinho de Castro, Jaime Tupiassu ^{[1
]}

Meggiolaro, Marco Antonio ^{[1
]}

机构：

[1] Pontifical Catholic Univ Rio de Janeiro, Dept Mech Engn, Rua Marques Sao Vicente 225, BR-22451900 Rio De Janeiro, RJ, Brazil

来源：

XVII INTERNATIONAL COLLOQUIUM ON MECHANICAL FATIGUE OF METALS (ICMFM17) | 2014年 / 74卷

关键词：

Short cracks; non-propagating cracks; fatigue; SCC; notch sensitivity;

D O I：

10.1016/j.proeng.2014.06.256

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The fatigue behavior of mechanically short cracks that depart from notch tips can be mechanically modeled using sound stress analysis techniques which properly account for the notch tip stress gradient influence on their growth rates, considering the basic fatigue properties of the material, its fatigue limit and long crack propagation threshold, and all the characteristics of the notch geometry and of the loading, without the need for any data fitting parameter. This model's predictions have been validated by proper tests, and a criterion to accept tolerable short cracks has been proposed based on it. In this work, this criterion is extended to model notch sensitivity effects in environmentally assisted cracking conditions. (C) 2014 Elsevier Ltd.

引用

页码：242 / 245

页数：4

共 8 条

[1] Scaling of quasibrittle fracture: Asymptotic analysis [J].