Numerical simulation of temperature field and residual stress in multi-pass welds in stainless steel pipe and comparison with experimental measurements
TL;DR: Based on the ABAQUS software, uncoupled thermal-mechanical three-dimensional and two-dimensional (2-D) finite element models are developed in this article to evaluate the transient temperature and the residual stress fields during welding.
About: This article is published in Computational Materials Science.The article was published on 2006-09-01. It has received 517 citations till now. The article focuses on the topics: Welding & Residual stress.
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TL;DR: In this article, a well-tested, three-dimensional, transient heat transfer and fluid flow model is used to accurately calculate transient temperature field for the residual stress and distortion modeling.
494 citations
Cites methods from "Numerical simulation of temperature..."
...Temperature-dependent plasticity with the von Mises yield criterion [5] is utilized to model the flow stress and plastic strain....
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...The resulting stress increment estimated from the elastic strain as [5]:...
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TL;DR: In this article, a unified equation to compute the energy density is proposed to compare works performed with distinct equipment and experimental conditions, covering the major process parameters: power, travel speed, heat source dimension, hatch distance, deposited layer thickness and material grain size.
369 citations
267 citations
TL;DR: In this article, the authors describe the formulation adopted for the numerical simulation of the shaped metal deposition process (SMD) and the experimental work carried out at ITP Industry to calibrate and validate the proposed model.
175 citations
Cites methods from "Numerical simulation of temperature..."
...The welding data, the process parameters, as well as the material characterization have been obtained from the experimental setting described in [25]....
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TL;DR: In this article, both the experiment and the finite element method (FEM) are utilized to investigate the welding residual stress distribution in medium thick-walled austenitic stainless steel pipe.
157 citations
References
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01 Jun 1984-Metallurgical and Materials Transactions B-process Metallurgy and Materials Processing Science
TL;DR: In this article, a double ellipsoidal geometry is proposed to model both shallow penetration arc welding processes and the deeper penetration laser and electron beam processes, which can be easily changed to handle non-axisymmetric cases such as strip electrodes or dissimilar metal joining.
Abstract: A mathematical model for weld heat sources based on a Gaussian distribution of power density in space is presented. In particular a double ellipsoidal geometry is proposed so that the size and shape of the heat source can be easily changed to model both the shallow penetration arc welding processes and the deeper penetration laser and electron beam processes. In addition, it has the versatility and flexibility to handle non-axisymmetric cases such as strip electrodes or dissimilar metal joining. Previous models assumed circular or spherical symmetry. The computations are performed with ASGARD, a nonlinear transient finite element (FEM) heat flow program developed for the thermal stress analysis of welds.* Computed temperature distributions for submerged arc welds in thick workpieces are compared to the measured values reported by Christensen1 and the FEM calculated values (surface heat source model) of Krutz and Segerlind.2 In addition the computed thermal history of deep penetration electron beam welds are compared to measured values reported by Chong.3 The agreement between the computed and measured values is shown to be excellent.
2,476 citations
TL;DR: In this paper, the through-thickness variation at the weld and heat affected zone, of the axial and hoop stresses and their sensitivity to variation in weld parameters are studied.
409 citations
TL;DR: In this article, the peak temperatures attained at different points during deposition of weld beads in stainless steel and low carbon steel weld pads were compared, and the residual stress patterns developed, the change in the peak tensile stress with the deposition of welding beads and the relation between peak temperatures and residual stresses in the weld pads are discussed.
134 citations
TL;DR: In this paper, the authors compared the through-thickness residual stress distributions of a pipe butt-welded joint and a pipe socket-weilded joint using inherent strain analysis and thermal elastic plastic analysis.
Abstract: Direct measurements and computed distributions of through-thickness residual stress in a pipe butt-welded joint and a pipe socket-welded joint are compared. The analytical evaluation methods used were inherent strain analysis and thermal elastic-plastic analysis. The experimental methods were neutron diffraction for the internal residual stress, and X-ray diffraction and strain-gauge measurement for the surface stress. The residual stress distributions determined using these methods agreed well with each other, both for internal stress and surface stress. The characteristics of the evaluation methods and the suitability of these methods for each particular welded object to be evaluated are discussed.
76 citations
TL;DR: In this article, the capabilities of advanced simulation to better understand and improve the manufacture of welded joints were discussed. And the best paper was presented at the American Society of Mechanical Engineers (ASME) conference in San Diego, USA.
Abstract: This paper has informed industry of the capabilities of advanced simulation to better understand and improve the manufacture of welded joints; in turn, to improve the lifetime and safety of high temperature structures used in the petrochemical and power generation industries. This paper was also presented at the American Society of Mechanical Engineers (ASME) conference in San Diego, USA, and was awarded the best paper prize.
30 citations