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Polish Academy of Sciences

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T. Żebro



Recent publications
1.  Żebro T., Kowalczyk-Gajewska K., Pamin J., A geometrically nonlinear model of scalar damage coupled to plasticity, Czasopismo Techniczne. Mechanika, ISSN: 0011-4561, Vol.20, No.105, pp.251-262, 2008
2.  Kowalczyk-Gajewska K., Pamin J., Żebro T., Development of gradient-enhanced damage-plasticity formulations for large deformations, Czasopismo Techniczne. Mechanika, ISSN: 0011-4561, Vol.20, No.105, pp.47-58, 2008

Conference papers
1.  Wcisło B., Żebro T., Kowalczyk-Gajewska K., Pamin J., Finite strain inelastic models with gradient averaging and AceGen implementation, ECCOMAX 2012, 6th European Congress on Computational Methods in Applied Sciences and Engineering, 2012-09-10/09-14, Wiedeń (AT), Vol.1, pp.1-15, 2012

Abstract:
This paper deals with the development of a family gradient-enhanced elasticity-damage-plasticity models for the simulation of failure in metallic and composite materials. The model incorporates finite deformations and is developed with the assumption of isotropy and isothermal conditions. The gradient enhancement applied to the damage part of the model aims at removing pathological sensitivity to the finite element discretization which can occur due to material softening. The attention is focused on the algorithmic aspects and on the implementation of the model using AceGen tool for automatic code generation, thus circumventing the cumbersome derivation of the consistent tangent for the Newton’s method. Numerical verification tests of the described model are performed with the Mathematica-based package AceFEM. Particularly, uniaxial tension test for a bar with a variable cross-section and tension of a perforated plate are examined.

Keywords:
large strain, damage, plasticity, gradient-enhancement, AceGen package

Affiliations:
Wcisło B. - Cracow University of Technology (PL)
Żebro T. - other affiliation
Kowalczyk-Gajewska K. - IPPT PAN
Pamin J. - Cracow University of Technology (PL)

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