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

C. D.M. Liljedahl; O. Zanellato; M. E. Fitzpatrick; J. Lin; L. Edwards

doi:10.1016/j.ijfatigue.2009.10.012

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

C. D.M. Liljedahl, O. Zanellato, M. E. Fitzpatrick, J. Lin, L. Edwards

Research output: Contribution to journal › Article › peer-review

73 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	735-743
Number of pages	9
Journal	International Journal of Fatigue
Volume	32
Issue number	4
Early online date	23 Oct 2009
DOIs	https://doi.org/10.1016/j.ijfatigue.2009.10.012
Publication status	Published - 1 Apr 2010
Externally published	Yes

Keywords

Fatigue
Finite element analysis
Neutron diffraction
Residual stresses
Welding

ASJC Scopus subject areas

Modelling and Simulation
General Materials Science
Mechanics of Materials
Mechanical Engineering
Industrial and Manufacturing Engineering

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10.1016/j.ijfatigue.2009.10.012

Cite this

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abstract = "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.",

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AU - Liljedahl, C. D.M.

AU - Zanellato, O.

AU - Fitzpatrick, M. E.

AU - Lin, J.

AU - Edwards, L.

PY - 2010/4/1

Y1 - 2010/4/1

N2 - 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.

AB - 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.

KW - Fatigue

KW - Finite element analysis

KW - Neutron diffraction

KW - Residual stresses

KW - Welding

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

Abstract

Keywords

ASJC Scopus subject areas

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