The effect of weld residual stresses and their re-distribution with crack growth during fatigue under constant amplitude loading

被引：64

作者：

Liljedahl, C. D. M. ^{[1
]}

Zanellato, O. ^{[1
]}

Fitzpatrick, M. E. ^{[1
]}

Lin, J. ^{[2
]}

Edwards, L. ^{[1
]}

机构：

[1] Open Univ, Milton Keynes MK7 6AA, Bucks, England

[2] Cranfield Univ, Damage Tolerance Grp, Cranfield MK43 0AL, Beds, England

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2010年 / 32卷 / 04期

关键词：

Neutron diffraction; Residual stresses; Fatigue; Welding; Finite element analysis; ALUMINUM AIRFRAME ALLOY; MICROMECHANICAL ASPECTS; PART; DIFFRACTION; NEUTRON; PROPAGATION; BEHAVIOR; REDISTRIBUTION; EVOLUTION; METAL;

D O I：

10.1016/j.ijfatigue.2009.10.012

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

In this work the evolution of the residual stresses in a MIG-welded 2024-T3 aluminium alloy M(T) specimen during in situ fatigue crack growth at constant load amplitude has been measured with neutron diffraction. The plastic relaxation and plasticity-induced residual stresses associated with the fatigue loading were found to be small compared with the stresses arising due to elastic re-distribution of the initial residual stress field. The elastic re-distribution was modelled with a finite element simulation and a good correlation between the experimentally-determined and the modelled stresses was found. A significant mean stress effect on the fatigue crack growth rate was seen and this was also accurately predicted using the measured initial residual stresses. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：735 / 743

页数：9

共 48 条

[1] NEUTRON-DIFFRACTION METHODS FOR THE STUDY OF RESIDUAL-STRESS FIELDS [J].