Effects of welding residual stresses on significance of defects in various types of welded joint

Finch, David M.; Burdekin, F.M.

doi:10.1016/0013-7944(92)90156-9

Cited by 42 publications

(16 citation statements)

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“…In general, the superposition of a residual stress field with one due to external loading modifies the stress intensity at crack tips and hence the crack driving force [27,28,29,30]. Indeed, in the prediction of weld fatigue lifetimes, it is commonly assumed that the large tensile stresses which may be present in the weld region dominate over the effect of the mean stress applied during the loading cycle [31].…”

Section: Fracture and Fatiguementioning

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: Fracture and Fatiguementioning

confidence: 99%

Contemporary approaches to reducing weld induced residual stress

Coules

2013

Materials Science and Technology

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“…2. Finch and Burdekin [3], he used the Finite Element code of ABAQUS. With the help of ABAQUS he analysis the residual stresses on the different types of T -fillet joints.…”

Section: Fascicle XImentioning

confidence: 99%

Control of welding deformation in thin plate

Ali

Teodor

2018

AUGAL.ShipBuilding

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Welding is a process to join metals with different arrangements of the plates. In the shipbuilding industry, the joining of plates in such a way as to ensure higher productivity is very important, but the industry has been facing the problem of deformation for seven decades. The shipbuilding industry is trying to control this problem, but thin plates bring non-linear problems in the structure, especially in the bulkhead of the structure that leads to more deformation due to small members of the profiles. This problem occurs in the construction of yachts because clients need good outlook of the ship. To control this problem the computational analysis is the more productive method than other to solve this deformation problem. The thermal elastic plastic FEM method is used to analyse the thermal and mechanical problems. This analysis confirmed that this TEP-Finite Element Method is applicable for the control of deformation in the thin plate.

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“…Parts produced for transportation industries usually undergo strong vibrations during their life and then fatigue resistance is a relevant issue in their manufacturing. Several research groups investigated the fatigue life of welded T-joints [1][2] and also the effects of the residual stresses on their fatigue behavior [3][4]. What is more, with specific reference to the aircraft applications where skins and stringers are welded together, corrosion phenomena have to be properly investigated in order to maximize the operating life of the joints [5].…”

Section: Introductionmentioning

confidence: 99%

Friction stir welding of tailored joints for industrial applications

2009

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Friction stir welding (FSW) is an energy efficient and environmentally "friendly" (no fumes, noise, or sparks) welding process, during which the workpieces are welded together in a solid-state joining process at a temperature below the melting point of the workpiece material under a combination of extruding and forging. Since its invention in 1991 by TWI, such process has been reaching a continuously increasing popularity among aerospace, automotive and shipbuilding industries due its capability to weld unweldable or difficult-to-weld light alloys in different joint morphologies. In this paper a wide experimental campaign is carried out in order to obtain T and lap joints characterized by dimensions of industrial interest from two sheets, the stringer and the skin, of different materials. In particular a peculiar clamping fixture has been designed in order to assure a perfect contact between the stringer and the skin and to develop the "transparency" welding; a proper welding tool has been utilized allowing to obtain at the same time a sound joint and the designed final component fillet radii. Finally T-pull tests together with macro and micro observations have been developed at the varying of the main process parameters.

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Effects of welding residual stresses on significance of defects in various types of welded joint

Cited by 42 publications

References 0 publications

Contemporary approaches to reducing weld induced residual stress

Contemporary approaches to reducing weld induced residual stress

Control of welding deformation in thin plate

Friction stir welding of tailored joints for industrial applications

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