Effect of welding sequences on residual stresses

Teng, Tso–Liang; Chang, Peng-Hsiang; Tseng, Wen-Cheng

doi:10.1016/s0045-7949(02)00447-9

Cited by 170 publications

(86 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These include bending-back of distorted weldments, presetting [55], control of mechanical constraint [56,57,58], control of weld sequencing [53,59,60], and flame straightening. An example of the effects of varying mechanical constraint is shown in Figure 6, and such methods of distortion control are discussed further by Conrardy and Dull [61] and Masubuchi [24].…”

Section: Distortionmentioning

confidence: 99%

Contemporary approaches to reducing weld induced residual stress

Coules

2013

Materials Science and Technology

View full text Add to dashboard Cite

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.

show abstract

Section: Distortionmentioning

confidence: 99%

Contemporary approaches to reducing weld induced residual stress

Coules

2013

Materials Science and Technology

View full text Add to dashboard Cite

show abstract

“…Furthermore, in the Backward sequence, the bare flange area adjacent to the buffer weld is subjected to lower temperature and therefore to lower thermal stresses. A somewhat related research on this topic has very recently been published after the present work was completed (Teng et al 2003).…”

Section: Two Possible Welding Sequencesmentioning

confidence: 93%

Improving the Ductility of Knee Joints between Rectangular Hollow Sections

Teh

Hancock

2004

J. Struct. Eng.

View full text Add to dashboard Cite

Abstract:This report describes a new welding-based solution that significantly increases the rotation capacity of a stiffened welded knee joint between DuraGal  C450 RHS under opening moment. The proposed solution is more economical than the use of internal sleeves, and can be applied to new as well as existing structures. The solution involves the use of extra layers of weld on the inner (tension) flange of a stiffened welded knee joint. Laboratory test results are presented to demonstrate that the solution enables such a joint between DuraGal  C450 4 50 150 × × or 5 50 150 × × RHS to satisfy the rotation capacity requirement specified for plastic design of steel frames. A number of factors that may contribute to the lack of rotation capacity of a normally welded stiffened knee joint are discussed. The reasons why the new solution results in increased rotation capacities are explained in terms of strain redistribution and strain reduction in the tensile regions around the knee joints. It is shown through experimental tests and finite element analyses that the most important parameter of the proposed solution is the width of the extra layers of weld. Although the presence of the seam weld in the inner flange results in a significantly reduced rotation capacity, the proposed solution still ensures an adequate rotation capacity for a stiffened welded knee joint between DuraGal RHS. This report also discusses an appropriate definition for the rotation capacity of a knee joint under opening moment, including the plastic moment to be used in measuring the rotation capacity.

show abstract

“…The grinding process to create the excavation was simulated by deactivating elements in the groove (elements death/rebirth [14]), using the coded "status function". The effect is achieved by multiplying the material properties of deactivated elements by a severe reduction factor.…”

Section: Computational Modelmentioning

confidence: 99%

“…They did not model the actual material removal, instead they used the "Birth and Death" element tool (element activation/deactivation) [14] to evaluate the strain relaxation due to the hole drilling. A similar approach was also adopted by Jiang et al [15] .…”

Section: Introductionmentioning

confidence: 99%

Residual stress analysis and finite element modelling of repair-welded titanium sheets

et al. 2017

View full text Add to dashboard Cite

An innovative finite element modelling approach has been tested to investigate the effects of weld repair of thin sheets of titanium alloy, taking into account a preexisting stress field in the components. In the case study analysed, the residual stress fields due to the original welds are introduced by means of a preliminary sequentiallycoupled thermo-mechanical analysis and considered as preexisting stress in the sheets for the subsequent repair weld simulation. Comparisons are presented between residual stress predictions and experimental measurements available from the literature, with the aim of validating the numerical procedure. As a destructive sectioning technique was used in the reference experimental measurements, an investigation is also presented on the use of the element deactivation strategy when adopted to simulate material removal. Although the numerical tool is an approximate approach to simulate the actual material removal, the strategy appears to predict a physical strain relaxation and stress redistribution in the remaining part of the component. The weld repair modelling strategy and the element deactivation tool adopted to simulate the residual stress measurement technique are shown to predict residual stress trends which are

show abstract

Effect of welding sequences on residual stresses

Cited by 170 publications

References 7 publications

Contemporary approaches to reducing weld induced residual stress

Contemporary approaches to reducing weld induced residual stress

Improving the Ductility of Knee Joints between Rectangular Hollow Sections

Residual stress analysis and finite element modelling of repair-welded titanium sheets

Contact Info

Product

Resources

About