INVESTIGATION OF LOCALIZATION DUE TO DAMAGE IN ELASTOPLASTIC MATERIALS

Localization due to damage is investigated for rate-independent plasti city. A general class of elasto-plastic models is presented and analyz ed in detail. Analytical localization results for homogeneous plane pr oblems are derived and discussed. A J(2) plasticity model exhibiting n onlinear isotropic hardening, Chaboche-Marquis nonlinear kinematic har dening and Lemaitre-Chaboche ductile damage is thoroughly studied. Ana lytical results for softening and localization are derived and discuss ed. A numerical study of homogeneous plane stress states under monoton ic biaxial loadings is conducted. Experimental results and numerical p redictions for a notched plate with a macro-defect are presented.