Anisotropic Damage for Extreme Dynamics
[ 1 ] Instytut Konstrukcji Budowlanych, Wydział Budownictwa i Inżynierii Środowiska, Politechnika Poznańska | [ P ] pracownik
2014
rozdział w monografii naukowej
angielski
EN Within this document, recent achievements of the Perzyna-type viscoplasticity theory for metallic materials subjected to extreme loading are considered. The complexity of the subject of matter lays in fact that for robust modelling the number of important phenomena included in the description is high. In consequence, the number of material parameters in the model is considerable. Thus, very detailed experimental examination of a particular material, under vast range of strain rates, temperatures, and scales of observations, is needed for applications. The important features of the presented theory, which assure reliability of the extreme dynamics modelling, in its qualitative and quantitative meaning, can be summarized as follows: (i) the description is invariant with respect to any diffeomorphism (covariant material model); (ii) the obtained evolution problem is well posed; (iii) sensitivity to the rate of deformation; (iv) finite elasto-viscoplastic deformations; (v) plastic non-normality; (vi) dissipation effects (anisotropic description of damage); (vii) thermomechanical couplings; and (viii) length-scale sensitivity are included.
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