A cohesive zone model for fatigue crack growth allowing for crack retardation

被引：98

作者：

Ural, Ani ^{[2
]}

Krishnan, Venkat R. ^{[3
]}

Papoulia, Katerina D. ^{[1
]}

机构：

[1] Univ Waterloo, Dept Civil & Environm Engn, Waterloo, ON N2L 3G1, Canada

[2] Villanova Univ, Dept Mech Engn, Villanova, PA 19085 USA

[3] Cornell Univ, Dept Theoret & Appl Mech, Ithaca, NY 14853 USA

来源：

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES | 2009年 / 46卷 / 11-12期

基金：

美国国家科学基金会; 加拿大自然科学与工程研究理事会; 美国国家航空航天局;

关键词：

Fatigue; Damage; Cohesive zone models; Crack propagation; Life prediction; Crack retardation; Healing; Mean stress effect; Load-ratio; Overload; POLYMERS; OVERLOAD; STEEL;

D O I：

10.1016/j.ijsolstr.2009.01.031

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

A damage-based cohesive model is developed for simulating crack growth due to fatigue loading. The cohesive model follows a linear damage-dependent traction-separation relation coupled with a damage evolution equation. The rate of damage evolution is characterized by three material parameters corresponding to common features of fatigue behavior captured by the model, namely, damage accumulation, crack retardation and stress threshold. Good agreement is obtained between finite element solutions using the model and fatigue test results for an aluminum alloy under different load ratios and for the overload effect on ductile 316 L steel. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：2453 / 2462

页数：10

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