Numerical weld modeling — a method for calculating weld-induced residual stresses

Fricke, Stefan; Keim, Elisabeth; Schmidt, Jason D.

doi:10.1016/s0029-5493(00)00414-3

Cited by 81 publications

(31 citation statements)

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“…The residual stresses left behind by welding are often sufficient to initiate SCC in areas where it would not otherwise occur due to the lack of a sufficient mechanical driving force [46]. Furthermore, welding can also cause geometric stress concentrations and increased metallurgical susceptibility to corrosion [47], so SCC frequently initiates at welded joints. This causes serious problems in applications (such as gas pipelines and nuclear reactor components) where welded parts are used in a corrosive environment [48,49], often necessitating costly inspection programmes to prevent this 'insidious' form of failure.…”

Section: Stress Corrosion Crackingmentioning

confidence: 99%

Contemporary approaches to reducing weld induced residual stress

Coules

2013

Materials Science and Technology

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General rightsThis document is made available in accordance with publisher policies. Please cite only the published version using the reference above. AbstractSelf-equilibrating residual stresses may occur in materials in the absence of external loading due to internal strain inhomogeneity. While favourable distributions of residual stress can bestow an object with the appearance of superior material properties, most welding processes leave behind residual stresses in particularly unfavourable patterns, causing a greater susceptibility to fracture-based failure mechanisms and unintended deformation. Currently, heat treatment is the primary means of removing these stresses, but since the formation of residual stress is dependent upon many material and process factors, there are several other viable mechanisms (using thermal, mechanical or phase transformation effects) by which it may be modified. It is only now, using relevant advances in numerical and experimental methods, that these techniques are being fully explored. This article gives a brief introduction to weld-induced residual stresses and reviews the current state-of-the-art with regard to their reduction. Emphasis is placed on the recent development of unconventional techniques, and the mechanisms by which they act.

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Section: Stress Corrosion Crackingmentioning

confidence: 99%

Contemporary approaches to reducing weld induced residual stress

Coules

2013

Materials Science and Technology

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“…In this regard an experimental work by Jonsson and Josefson [12] and some three-dimensional finite element (FE) studies [10,11,13]; reported deviations from rotational symmetry, especially at the beginning and end of the welding cycle for circumferential joint in welding of pipes with lateral symmetry. Later, by using a full three-dimensional model for multi-pass welding of pipes, Fricke et al [14] concluded that residual stresses are by no means axis-symmetric.…”

Section: Introductionmentioning

confidence: 99%

Analysis of weld-induced residual stresses and distortions in thin-walled cylinders

2009

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Circumferential weld specifically in thin-walled structures is a common joint type in the fabrication of structural members in aerospace, aeronautical and pressure vessel industries. This type of weld joint suffers various types of weld-induced residual stress fields (hoop and axial) and deformation patterns (axial shrinkage, radial shrinkage). These imperfections have negative effects on fabrication accuracies and result in low strength welded structures that can lead to premature failures. To precisely capture the distortions and residual stresses, computational methodology based on three-dimensional finite element model for the simulation of gas tungsten arc welding in thin-walled cylinders is presented. Butt-weld geometry with single "V" for a 300 mm outer diameter cylinder of 3 mm thick is used. The complex phenomenon of arc welding is numerically solved by sequentially coupled transient, non-linear thermo-mechanical analysis. The accuracy of both the thermal and structural models is validated through experiments for temperature distribution, residual stresses and distortion. The simulated result shows close correlation with the experimental measurements.

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“…Significant efforts have been made to examine the utility of 2D (plane stress, plane strain or axisymmetric) analyses in predicting residual stress in several joining processes and joint geometries considering both single-and multi-pass welding. [36][37][38][39][40][41][42][43][44][45][46][47][48][49] Remarkably, most of the modelling attempts used a conduction heat transfer analysis to predict the temperature field. Since convection is the main mechanism of heat transfer in the weld pool, the temperature and stress fields computed from heat conduction models are susceptible to large errors, particularly near the weld pool where temperature changes are significant.…”

Section: Introductionmentioning

confidence: 99%

A perspective on residual stresses in welding

De¹,

DebRoy²

2011

Science and Technology of Welding and Joining

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Welding induced residual stress occurs due to non-uniform simultaneous heating and cooling, local variation in shrinkage because of variable cooling rates in different regions of the weld, and strains associated with metallurgical phase transformations. The residual stress in a welded joint can augment the externally applied load and cause structural failure. Prediction and mitigation of residual stresses still remain important issues in welding. The purpose of this special issue of Science and Technology of Welding and Joining is to present recent research on calculation, measurement and alleviation of residual stresses in welding.

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Numerical weld modeling — a method for calculating weld-induced residual stresses

Cited by 81 publications

References 0 publications

Contemporary approaches to reducing weld induced residual stress

Contemporary approaches to reducing weld induced residual stress

Analysis of weld-induced residual stresses and distortions in thin-walled cylinders

A perspective on residual stresses in welding

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