Elastic-plastic ductile damage model based on strain-rate plastic potential
TypeArticles dans des revues avec comité de lecture
Modeling of ductile damage is generally done using analytical potentials, which are expressed in the stress space. In this paper, for the first time it is shown that strain rate potentials which are exact conjugate of the stress-based potentials can be instead used to model the dilatational response of porous polycrystals. A new integration algorithm is also developed. It is to be noted that a strain-rate based formulation is most appropriate when the plastic flow of the matrix is described by a criterion that involves dependence on all stress invariants. In such cases, although a strain-rate potential is known, the stress-based potential cannot be obtained explicitly. While the proposed framework based on strain-rate potentials is general, for comparison purposes in this work we present an illustration of the approach for the case of a porous solid with von Mises matrix containing randomly distributed spherical cavities. Comparison between simulations using the strain-rate based approach and the classical stress-based Gurson’s criterion in uniaxial tension is presented. These results show that the model based on a strain-rate potential predicts the dilatational response with the same level of accuracy.
Files in this item
Showing items related by title, author, creator and subject.
Investigation of advanced strain-path dependent material models for sheet metal forming simulations HADDAG, Badis; BALAN, Tudor; ABED-MERAIM, Farid (Elsevier, 2006)Sheet metal forming processes often involve complex loading sequences. To improve the prediction of some undesirable phenomena, such as springback, physical behavior models should be considered. This paper investigates ...
Elastic-plastic analyses using the solid-shell finite element SHB8PS and evaluation on sheet forming applications SALAHOUELHADJ, Abdellah; CHALAL, Hocine; ABED-MERAIM, Farid; BALAN, Tudor (Onate, E; Owen, DRJ; Peric, D; Suarez, B, 2011)In this contribution, the formulation of the SHB8PS continuum shell finite element is extended to anisotropic elastic-plastic behavior models with combined isotropic-kinematic hardening at large deformations. The resulting ...
RABAHALLAH, Meziane; BOUVIER, Salima; BALAN, Tudor; BACROIX, Brigitte (Elsevier, 2009)For numerical simulation of sheet metal forming, more and more advanced phenomenological functions are used to model the anisotropic yielding. The latter can be described by an adjustment of the coefficients of the yield ...
Prediction of strain localization in sheet metal forming using elastoplastic-damage model and localization criterion HADDAG, Badis; ABED-MERAIM, Farid; BALAN, Tudor (2007)The aim of this work is to study the strain localization during the plastic deformation of sheets metals. This phenomenon is precursor for the fracture of drawing parts, thus its prediction using advanced behavior models ...
Crystal plasticity and phenomenological approaches for the simulation of deformation behavior in thin copper alloy sheets ADZIMA, Francis; MANACH, Pierre-Yves; BONNET, Nicolas; TABOUROT, Laurent; BALAN, Tudor (Elsevier, 2017)In the expanding context of device miniaturization, forming processes of ultra thin sheet metals are gaining importance. Numerical simulation of these processes requires accurate material modeling. In this study, both the ...