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Sökning: WFRF:(Pamin Jerzy)

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1.
  • Wcisło, Balbina, et al. (författare)
  • Numerical analysis of ellipticity condition for large strain plasticity
  • 2018
  • Ingår i: Computer Methods in Mechanics, CMM 2017 : Proceedings of the 22nd International Conference on Computer Methods in Mechanics - Proceedings of the 22nd International Conference on Computer Methods in Mechanics. - : Author(s). - 9780735416147 ; 1922
  • Konferensbidrag (refereegranskat)abstract
    • This paper deals with the numerical investigation of ellipticity of the boundary value problem for isothermal finite strain elasto-plasticity. Ellipticity can be lost when softening occurs. A discontinuity surface then appears in the considered material body and this is associated with the ill-posedness of the boundary value problem. In the paper the condition for ellipticity loss is derived using the deformation gradient and the first Piola-Kirchhoff stress tensor. Next, the obtained condition is implemented and numerically tested within symbolic-numerical tools AceGen and AceFEM using the benchmark of an elongated rectangular plate with imperfection in plane stress and plane strain conditions.
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2.
  • Wcisło, Balbina, et al. (författare)
  • On Spatial vs Referential Isotropic Fourier’s Law in Finite Deformation Thermomechanics
  • 2023
  • Ingår i: Engineering Transactions. - 0867-888X. ; 71:1, s. 111-140
  • Tidskriftsartikel (refereegranskat)abstract
    • This paper deals with the issue of isotropic heat conduction in thermomechanical large-strain problems. The aim of the paper is a comparison of different variants of Fourier’s law used in the literature for a large strain problem. In particular, Fourier’s law is specified either in the reference or in the deformed configuration by using different options of heat flux density vectors which are presented and discussed. The paper includes working examples to illustrate the presented theory. Moreover, different formulations of Fourier’s law are tested by using the finite element method to investigate the influence of the applied variant on simulation results. The analysis reveals that in a strongly deformed area the temperature distribution varies.
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  • Resultat 1-2 av 2
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konferensbidrag (1)
tidskriftsartikel (1)
Typ av innehåll
refereegranskat (2)
Författare/redaktör
Menzel, Andreas (2)
Wcisło, Balbina (2)
Pamin, Jerzy (2)
Rose, Lars (1)
Kowalczyk-Gajewska, ... (1)
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Lunds universitet (2)
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Engelska (2)
Forskningsämne (UKÄ/SCB)
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