Modeling of Strain Localization for the Gurson-Tvergaard-Needleman Plasticity Model Using Strong Discontinuity Modes

Sebastián D’hers, Eduardo N. Dvorkin


The Gurson-Tvergaard-Needleman material model is frequently used to model ductile failure. At the inception of ductile fracture, the modeling of the strain localization phenomenon requires the use of different scales for the description of the continuum and the localized subdomains, thus inducing mesh dependent results when finite elements are used. In this work the necessary and sufficient localization conditions are explored for the GursonTvergaard-Needleman material and the outcome is inserted into a mesh indifferent formulation with the use of embedded strong discontinuity modes. An heuristic rule to set a proper interscales connection between the localized and the continuum scales is introduced. The new formulation does not require a specific mesh refinement to model strain localization and provides mesh independent results.

Full Text:


Asociación Argentina de Mecánica Computacional
Güemes 3450
S3000GLN Santa Fe, Argentina
Phone: 54-342-4511594 / 4511595 Int. 1006
Fax: 54-342-4511169
E-mail: amca(at)
ISSN 2591-3522