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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Imperfections generation in finite element models of welding

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Autor(es):
Novotny, Ladislav [1] ; de Abreu, Hamilton Ferreira Gomes [2] ; Zajac, Jozef [1] ; Beres, Miloslav [3]
Número total de Autores: 4
Afiliação do(s) autor(es):
[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
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: SCIENCE AND TECHNOLOGY OF WELDING AND JOINING; v. 23, n. 2, p. 148-157, 2018.
Citações Web of Science: 0
Resumo

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)

Processo FAPESP: 16/09350-2 - Desenvolvimento de implantes customizados em biomateriais metálicos utilizando sinterização direta de metais por laser
Beneficiário:Rubens Maciel Filho
Linha de fomento: Auxílio à Pesquisa - Pesquisador Visitante - Internacional