Residual stresses at weld repairs and effects of repair geometry. (19th May 2017)

• Record Type: Journal Article
• Authors: Song, S.; Dong, P.
• Is Part Of: Science and technology of welding & joining. Volume 22:Number 4(2017)
• Page Start: 265
• Page End: 277
• Publication Date: 2017-05-19
• Subjects: Residual stresses -- Weld repair -- Fitness-for-service -- Fracture assessment -- Membrane and bending decomposition -- Finite element modelling -- Mitigation techniques -- Stress intensity factor; Welding -- Periodicals; Joints (Engineering) -- Periodicals; Surfaces (Technology) -- Periodicals; 671.52
• DOI: 10.1080/13621718.2016.1224544
• Languages: English
• ISSNs: 1743-2936

Abstract

ABSTRACT: In this study, an in-depth investigation of repair weld geometry effects on residual stress distributions in terms of both through-thickness membrane and bending content as well as its contribution to fracture driving force is carried out. Some major findings are: A fundamental difference in residual stress distributions between initial and repair welds can be characterised as a significant elevation of membrane and bending content in transverse residual stresses. The dominance of repair-induced residual stresses over those generated by initial welds suggests that initial weld residual stresses can be assumed negligible in repair weld modelling. A weld repair should be designed as long as possible, as narrow as possible and as shallow as possible.