Multiaxial effects on LCF behaviour and fatigue failure of AZ31B magnesium extrusion

被引：59

作者：

Albinmousa, J. ^{[1
]}

Jahed, H. ^{[2
]}

机构：

[1] King Fahd Univ Petr & Minerals, Dept Mech Engn, Dhahran, Saudi Arabia

[2] Univ Waterloo, Mech & Mechatron Engn Dept, Waterloo, ON N2L 3G1, Canada

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2014年 / 67卷

基金：

加拿大创新基金会; 加拿大自然科学与工程研究理事会;

关键词：

Multiaxial fatigue; Phase angle; Critical plane; Strain energy; Magnesium alloys; PRINCIPAL STRESS DIRECTIONS; HIGH-CYCLE FATIGUE; CRACK-GROWTH; MECHANICAL ANISOTROPY; DEFORMATION-BEHAVIOR; METALLIC MATERIALS; LIFE PREDICTION; PLANE APPROACH; NONBASAL SLIP; PART II;

D O I：

10.1016/j.ijfatigue.2014.01.025

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Multiaxial cyclic tests were performed on wrought AZ31B magnesium extrusion. Axial, torsional and multiaxial cyclic behaviours of the material are presented. Effects of phase angle on stress-strain response, cyclic hardening and fatigue life are discussed. It was found that the material exhibits additional cyclic hardening due to non-proportional loading. However, the phase angle has no pronounced effect on fatigue life. Fatigue cracking behaviour was examined and two characteristics of crack geometry, i.e., size and orientation, are presented. Multiaxial fatigue lives using the Fatemi-Socie and the Smith-Watson-Topper models were predicted. In addition, the Jahed-Varvani energy model was used for fatigue life prediction and was shown to have a potential to be evaluated at plane of maximum axial strain energy density. Reverse analysis for predicting fatigue life by pre-defined critical plane as the observed plane is discussed in details. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：103 / 116

页数：14

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