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Magnetic field models for high intensity arcs, applied to welding: A comparison between three different formulations
University West, Department of Technology, Mathematics and Computer Science, Division for Mechanical Engineering. (Welding, PTW)ORCID iD: 0000-0003-2535-8132
University West, Department of Engineering Science, Division of Mechanical Engineering. (PTW)ORCID iD: 0000-0002-7897-621X
Chalmers University of Technology, Department of Applied Mechanics, .
2013 (English)In: ASM Proceedings of the International Conference: Trends in Welding Research 2013, Chicago, IL: ASM International, 2013, 876-885 p.Conference paper, Published paper (Refereed)
Abstract [en]

Most simulation studies done to deeper understand high-intensity welding arcs address axi-symmetric configurations and use the electric potential formulation. This formulation involves the assumption of a one-dimensional magnetic field. The assumption is justified in its original frame: rather long arcs (about 10 mm), and when the electrode tip is excluded from the computational domain. However, arcs applied to welding are shorter, and the electrode geometry is important to take into account. The present work questions the assumption of a one-dimensional magnetic field for simulating short welding arcs. We have compared three different approaches for modeling the magnetic field: three-dimensional, two-dimensional axi-symmetric, and the electric potential formulation. These models have been applied to water cooled anode Gas Tungsten Arc Welding (GTAW) test cases with truncated conical electrode tip (tip radius of 0.5 and 0.2 mm) and various arc lengths (2, 3 and 5 mm). For the axi-symmetric cases studied in the present work, the three- and two-dimensional models give exactly the same results. The one-dimensional simplification of the magnetic field turns out to have a significant unfavorable effect on the simulation results. For axi-symmetric welding applications, it is argued that the two-dimensional axi-symmetric formulation should be used. Copyright © 2013 ASM International® All rights reserved.

Place, publisher, year, edition, pages
Chicago, IL: ASM International, 2013. 876-885 p.
Keyword [en]
Work-integrated Learning, WIL, Robotics, Welding
Keyword [sv]
AIL
National Category
Robotics
Research subject
ENGINEERING, Manufacturing and materials engineering; Work Integrated Learning
Identifiers
URN: urn:nbn:se:hv:diva-5566Scopus ID: 2-s2.0-84880664004ISBN: 9781627089982 (print)OAI: oai:DiVA.org:hv-5566DiVA: diva2:657314
Conference
9th International Conference on Trends in Welding Research; Chicago, IL; United States; 4 June 2012 through 8 June 2012; Code 97902
Available from: 2013-10-18 Created: 2013-08-13 Last updated: 2016-02-09Bibliographically approved

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