Adjust the thermo-mechanical properties of finite element models welded joints based on soft computing techniques

  1. Martinez, R.F. 2
  2. Lorza, R.L. 3
  3. Bobadilla, M.C. 3
  4. Garcia, R.E. 1
  5. Gomez, F.S. 3
  6. Vergara González, E.P. 3
  1. 1 Leeds Beckett University
    info

    Leeds Beckett University

    Leeds, Reino Unido

    ROR https://ror.org/02xsh5r57

  2. 2 Universidad del País Vasco/Euskal Herriko Unibertsitatea
    info

    Universidad del País Vasco/Euskal Herriko Unibertsitatea

    Lejona, España

    ROR https://ror.org/000xsnr85

  3. 3 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

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Journal:
Lecture Notes in Computer Science

ISSN: 0302-9743

Year of publication: 2017

Volume: 10334 LNCS

Pages: 699-709

Type: Article

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DOI: 10.1007/978-3-319-59650-1_59 SCOPUS: 2-s2.0-85021760935 GOOGLE SCHOLAR

More publications in: Lecture Notes in Computer Science

Abstract

An appropriate characterization of the thermo-mechanical behavior of elastic-plastic Finite Element (FE) models is essential to ensure realistic results when welded joints are studied. The welded joints are subject to severe angular distortion produced by an intense heat concentration on a very small area when they are manufactured. For this reason, the angular distortion and the temperature field, which the joints are subjected, is very difficult to model with the Finite Element Method (FEM) when nonlinear effects such as plasticity of the material, radiation and thermal contacts are considered. This paper sets out a methodology to determine the most appropriate parameters needed for modelling the thermo-mechanical behavior in welded joints FE models. The work is based on experimental data (temperature field and angular distortion) and the combined use of Support Vector Machines (SVM) and Genetic Algorithms (GA) with multi-objective functions. The proposed methodology is applied for modelling Butt joint with single V-groove weld manufactured by Gas Metal Arc Welding (GMAW) process when the parameters of speed, current and voltage are, respectively, 6 mm/sec 140 amps and 26 V. © Springer International Publishing AG 2017.