Journal ArticleDOI
An efficient FE computation for predicting welding induced buckling in production of ship panel structure
TLDR
In this paper, an efficient FE computation which is an elastic FE analysis based on inherent deformation method, is proposed to predict welding induced buckling with employing large deformation theory, and an application in ship panel production is carried out.About:
This article is published in Marine Structures.The article was published on 2015-04-01. It has received 62 citations till now. The article focuses on the topics: Welding & Fillet weld.read more
Citations
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Mitigation of welding induced buckling with transient thermal tension and its application for accurate fabrication of offshore cabin structure
TL;DR: In this paper, a non-linear thermal elastic plastic FE computation with welding inherent deformation as mechanical load was carried out to predict out-of-plane welding distortion of considered cabin structure, while cases of conventional welding and welding with transient thermal tension were examined.
Journal ArticleDOI
Prediction of welding-induced distortions in large weld structure through improved equivalent load method based on average plastic strains
TL;DR: In this paper, the effect of start, end and middle quasi-steady state was considered to predict weld-induced distortion at the design stage in order to reduce the need for post welding processes.
Journal ArticleDOI
Influence of triangle reinforcement plate stiffeners on welding distortion mitigation of fillet welded structure for lightweight fabrication
TL;DR: In this paper, the inherent deformation of typical welded joints in a mock-up welded structure were estimated through thermal elastic plastic finite element (TEP FE) analysis, and the welding distortion of the real welded structures was computed via elastic FE analysis.
Journal ArticleDOI
Welding-induced residual stresses and distortions of butt-welded corroded and intact plates
TL;DR: In this article, the welding-induced residual stresses and distortions of butt-welds between non-corroded and corroded steel plates are studied experimentally and numerically, simulating a repair in an aged structure.
Journal ArticleDOI
Consumable development to tailor residual stress in parts fabricated using directed energy deposition processes
Niyanth Sridharan,Jeffrey R. Bunn,Michael Kottman,Chris M. Fancher,Andrew Payzant,Mark W. Noakes,Andrzej Nycz,Lonnie J. Love,Badri K. Narayanan,S. Suresh Babu +9 more
Abstract: Distortion and residual stresses are major challenges that limit the ability to fabricate large scale structures using Additive Manufacturing (AM). Researchers worldwide are evaluating techniques to induce compressive residual stress in the parts via intermittent rolling. While reasonable success has been documented, the idea of lowering the martensite start temperature to induce compressive stresses has not been evaluated in the context of AM, despite demonstrated success by the welding community. This study validates the hypothesis that, by a proper selection of materials and process parameters, one may effectively reduce distortion and induce a compressive residual stress in AM parts. Using neutron diffraction to measure residual stresses in parts, we demonstrate that, in addition to selection of the correct materials, the inter pass temperature plays a major role in controlling the residual stress evolution. The observations relating to the residual stresses are rationalized based on a microstructural evolution in these samples. Based on this preliminary study, a strategy to fabricate large structures with minimal distortion and residual stress is outlined.
References
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Book
Computational welding mechanics
John A. Goldak,Mehdi Akhlaghi +1 more
TL;DR: In this article, a computer simulation of Welding Processes is presented, where the evolution of microstructure depending on temperature and deformation of the Welded Structures and applications of welding in Industrial Fields.
Journal ArticleDOI
Prediction of welding distortion and residual stress in a thin plate butt-welded joint
Dean Deng,Hidekazu Murakawa +1 more
TL;DR: In this paper, a three-dimensional, thermo-elastic-plastic, large deformation finite element method (FEM) is used to simulate welding distortion in a low carbon steel butt-welded joint with 1mm thickness.