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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Imperfections generation in finite element models of welding

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Author(s):
Novotny, Ladislav [1] ; de Abreu, Hamilton Ferreira Gomes [2] ; Zajac, Jozef [1] ; Beres, Miloslav [3]
Total Authors: 4
Affiliation:
[1] Tech Univ Kosice, Dept Comp Aided Mfg Technol, Bayerova 1, Presov 08001 - Slovakia
[2] Univ Fed Ceara, Dept Met & Mat Engn, Fortaleza, Ceara - Brazil
[3] Univ Estadual Campinas, Fac Chem Engn, Natl Inst Biofabricat, Campinas, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: SCIENCE AND TECHNOLOGY OF WELDING AND JOINING; v. 23, n. 2, p. 148-157, 2018.
Web of Science Citations: 0
Abstract

Welded components contain certain geometrical imperfections which may affect buckling behaviour of the final product. However, geometrical perfect models are usually used in the finite element method simulation. When a simple weld model is used, the mode of the end-distortion is predictable. Imperfections are created in the same shape as predicted. This paper presents a novel numerical approach on how to generate geometrical imperfections in finite element models. In this approach, as first, a large temperature gradient for the weld seam elements is prescribed. Then a linear steady-state thermal analysis is conducted and is followed by a structural analysis to determine the initial stress stiffness matrix for an eigenvalue analysis. The mode shapes of eigenvalue analysis are finally used to generate the imperfections. The results obtained in the course of this work allowed to calculate resultant welding distortion more accurate. (AU)

FAPESP's process: 16/09350-2 - Development of customized metallic implants using direct metal laser sintering
Grantee:Rubens Maciel Filho
Support Opportunities: Research Grants - Visiting Researcher Grant - International