Fatigue behaviour of AlMgSi tubular specimens subjected to bending-torsion loading

被引：12

作者：

Abreu, L. M. P. ^{[1
]}

Costa, J. D. ^{[2
]}

Ferreira, J. A. M. ^{[2
]}

机构：

[1] Univ Aveiro, ESTGA, P-3754909 Agueda, Portugal

[2] Univ Coimbra, Dept Mech Engn, CEMUC, P-3030788 Coimbra, Portugal

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2009年 / 31卷 / 8-9期

关键词：

Aluminium alloys; In-phase biaxial fatigue; Tubular notched and welded specimens; Fatigue damage zone; Predictions; FIELD INTENSITY APPROACH; MULTIAXIAL FATIGUE; LIFE PREDICTION; WELDED-JOINTS;

D O I：

10.1016/j.ijfatigue.2009.03.004

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The work here presented is concerned with an experimental and numerical fatigue behaviour study of tubular specimens. Welded and notched tubular specimens of AlMgSi T6 alloy were submitted to in-phase bending-torsion tests. For both geometries, correlation of the fatigue lives was satisfactorily obtained by the distortion energy hypothesis based on the local stresses. A stress-strain field intensity approach and a novel energy-based approach were used to predict the fatigue lives. The applicability of fictitious radius concept at the welded toe was also tested. Comparison between referred theoretical predictions and experimental results reveal reasonable correlations, taking into account the scatter normally observed in fatigue results. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1327 / 1336

页数：10