Journal ArticleDOI
Fatigue crack growth in residual stress fields : experimental results and modelling
TLDR
In this article, the results of fatigue crack growth rate tests conducted in the presence of residual stresses are discussed with reference to experimental trends, in order to clarify the predictive capabilities of the method and aspects needing further investigation.Abstract:
— The paper discusses the results of fatigue crack growth rate tests conducted in the presence of residual stresses. Three different residual stress distributions, obtained by laser welds, were employed in order to characterize the crack propagation behaviour under different conditions, producing either an increase or a reduction of the stress intensity factor due to external loads. Test results are analysed by means of a non-linear numerical model (based on the weight function method) and a knowledge of the fatigue crack growth properties of the base material, free from residual stresses. The results of the analysis are discussed with reference to experimental trends, in order to clarify the predictive capabilities of the method and aspects needing further investigation.read more
Citations
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Journal ArticleDOI
A literature survey on the stability and significance of residual stresses during fatigue
TL;DR: In this paper, the authors provide a broad and extensive literature survey addressing the stability of surface and near-surface residual stress fields during fatigue, including redistribution and relaxation due to static mechanical load, repeated cyclic loads, thermal exposure and crack extension.
Journal ArticleDOI
Review on fracture and crack propagation in weldments - A fracture mechanics perspective
Uwe Zerbst,Robert A. Ainsworth,H.Th. Beier,H. Pisarski,Zhiliang Zhang,Kamran Nikbin,Thomas Nitschke-Pagel,Sebastian Münstermann,Pawel Kucharczyk,Dietmar Klingbeil +9 more
TL;DR: In this article, the authors provide an overview on the current state of fracture mechanics application to weldments and discuss the specific features which any fracture mechanics analysis of weldments has to take into account.
Journal ArticleDOI
Control of welding residual stress for ensuring integrity against fatigue and stress–corrosion cracking
TL;DR: The availability of several techniques for residual stress control is discussed in this paper, and the effectiveness of these techniques in protecting from fatigue and stress-corrosion cracking is verified by numerical analysis and actual experiment.
Journal ArticleDOI
Effect of residual stress around cold worked holes on fracture under superimposed mechanical load
TL;DR: In this paper, two-dimensional (2D) finite element analyses have been carried out to quantify the residual stresses surrounding the cold worked hole and these residual stresses have been used in a finite element calculation of the effective stress intensity factor for cracks emanating from the hole edge normal to the loading direction.
Journal ArticleDOI
Predicting fatigue crack growth rate in a welded butt joint: The role of effective R ratio in accounting for residual stress effect
Guido Servetti,Xiang Zhang +1 more
TL;DR: In this paper, a simple and efficient method is presented for predicting fatigue crack growth rate in welded butt joints, based on the superposition rule of the linear elastic fracture mechanics, welding residual stress effect is accounted for by replacing the nominal stress ratio (R ) in the empirical laws by the effective stress intensity factor ratio ( R eff ).
References
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Journal ArticleDOI
Fatigue crack propagation through residual stress fields with closure phenomena
Marco Beghini,Leonardo Bertini +1 more
TL;DR: In this article, the effects of residual stress fields on fatigue crack propagation were evaluated using two numerical methods, i.e., finite element method and the weight function method, allowing a detailed analysis of the experimental data to be obtained.
Journal ArticleDOI
Fatigue crack growth and closure behaviour through a compressive residual stress field
TL;DR: In this paper, the authors investigated the behavior of fatigue crack growth and closure through a compressive residual stress field and found that partial opening of the crack occurs and this plays an important role in crack growth.
Journal ArticleDOI
Effects of welding residual stresses on fatigue crack growth behaviour in butt welds of a pipeline steel
Y.W. Shi,B.Y. Chen,Jianxun Zhang +2 more
TL;DR: In this paper, the effect of welding residual stresses on the crack growth rate is related to the position of the crack and its orientation with respect to the weld line, and its influence on the fatigue crack closure is discussed.
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Fatigue crack propagation through residual stress fields with closure phenomena
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