A framework for estimating residual stress profile in seam welded pipe and vessel components Part II: Outside of weld region. (October 2016)

• Record Type: Journal Article
• Authors: Song, Shaopin; Dong, Pingsha
• Is Part Of: International journal of pressure vessels and piping. Volume 146(2016)
• Page Start: 65
• Page End: 73
• Publication Date: 2016-10
• Subjects: Residual stresses -- Finite element -- Long seam welds -- Pipe and vessel welds -- Residual stress profile -- Fitness-for-service -- Membrane and bending decomposition -- Curved beam; Pressure vessels -- Periodicals; Pipe -- Periodicals; Récipients sous pression -- Périodiques; Tuyaux -- Périodiques; Pipe; Pressure vessels; Periodicals; 681.76041
• DOI: 10.1016/j.ijpvp.2016.07.010
• Languages: English
• ISSNs: 0308-0161

Abstract

Abstract: Part I of this study has identified two key parameters ( r / t ratio and characteristic heat input Q ˆ ) that dominate important through-thickness residual stress distribution characteristics, with which a residual stress profile estimation scheme has been developed for weld region, i.e., at weld centerline and weld toe. In Part II, we present an analytical model for achieving residual stress profile estimation for through-thickness sections away from the weld region in seam welded pipe and vessel components. A curved beam bending theory based model is analytically constructed through an assembly of two parts: One is weld fusion zone region and the other is the rest of the component section along circumferential direction. The final assembly of the two parts leads to a closed form solution to both axial (longitudinal) and hoop (transverse) residual stress components as a function of circumferential angular position away from weld toe. The effectiveness of the full-field residual stress estimation scheme is demonstrated by comparing with finite element modeling results over a broad range of weld geometries and welding conditions. The present development should provide a consistent and effective means for estimating through-thickness residual stress profile as a continuous function of pipe geometry and welding heat input. Highlights: A curved beam bending theory based two-part assembly model is developed for generalizing residual stress distributions for outside of weld region. A full-field estimation of through-thickness residual stress profiles is achieved by considering weld region (Part I) and outside of weld region (part II). The proposed estimation scheme offers both consistency and mechanics basis in residual stress profile generation.