Analysis of residual stress in stainless steel pipe weld subject to mechanical axial tension loading

Abstract

This paper presents the characteristics of welding residual stresses in circumferential butt-welded stainless steel pipe by utilizing three-dimensional (3-D) uncoupled thermo-mechanical finite element (FE) analysis method. Moreover, stress variations in welded joints of the pipe under superimposed mechanical axial tension loading are further investigated employing the welding residual stresses and plastic strains obtained from the thermo-mechanical FE analysis as an initial condition. Results show that spatial variations of the welding residual stresses are present along the circumference and a rapid change of the residual stresses exists at the welding start/stop position, hence 3-D FE analysis is essential to accurately simulate circumferential welding of a pipe component. When mechanical axial tension loading is applied to the circumferentially buttwelded stainless steel pipe, bending moment is generated at the welded joints caused by the circumferential shrinkage of the weld region during welding; thus affecting the axial and hoop stress evolutions in the course of the superimposed mechanical loading.

Numerical-experimental analysis of a modified G-BOP test to evaluate cracks in weld beads in thin sheets

“…For the appropriated characterization of the phenomenon, it is important that the appropriated WM for a given BM is employed, because the dilution effects between them are taken into account [7]. Also, the establishment of the welding residual stresses, crucial to the occurrence of HIC, depends, beyond the geometry and restraining conditions, on the thermomechanical properties of the materials [8][9][10][11][12][13][14][15][16].…”

“…The improvement of computational capabilities has made numerical methods, in particular the Finite Element Method (FEM), a strong ally for engineers to understand phenomena of various engineering areas. It has been successfully applied in the simulation of welding regarding its thermal [8][9][10][11] and structural [12][13][14][15][16] aspects. Therefore, the present paper aims to apply this tool, using the commercial software ANSYS ® , in the evaluation of the modified G-BOP test through a numerical-experimental analysis of three study cases: case 1, a standard G-BOP test with AISI 1020 steel as BM; case 2, a modified G-BOP test with AISI 1020 as small thickness BM; and case 3, a modified G-BOP test with the API 5L X70 HSLA steel as small thickness BM.…”

Geração E Partição De Calor Em Usinagem Por Meio Do Método Calorimétrico: Uma Revisão

“…Conforme já destacado, uma vez que há forte dependência do campo de tensões residuais ao histórico de temperaturas, mas a dependência inversa é negligenciável (Chang et al, 2010), uma análise sequencial é eficiente para a avaliação do fenômeno.…”

Modeling of Eddy Current Welding of Rail: Three-Dimensional Simulation

“…Therefore, in order to ensure the higher speed, load capacity, and smoothness of high-speed rail transportation, together with the safety and stability of the railway, some more strict requirements must be fulfilled. The material [ 1 , 2 ], welding [ 3 , 4 ], heat treatment technology, [ 5 ] and forming [ 6 ] of railway rails are put forward under more strict requirements.…”