000016027 001__ 16027
000016027 005__ 20161115135336.0
000016027 04107 $$aeng
000016027 046__ $$k2013-06-12
000016027 100__ $$aPanoskaltsis, V.
000016027 24500 $$aA Metric Theory of Rate Independent and Rate Dependent Plasticity: Theoretical and Computational Aspects

000016027 24630 $$n34.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000016027 260__ $$bNational Technical University of Athens, 2013
000016027 506__ $$arestricted
000016027 520__ $$2eng$$aA new internal variable theory for the description of solid materials having mechanisms with different characteristic times, is developed within a finite deformation framework. The theory relies crucially on the consistent combination of a general viscoplastic theory and a new version of rate – independent generalized plasticity theory. In this new version of rate – independent generalized plasticity the concepts of viscous range and viscous process have been introduced, while, as in classical generalized plasticity, the notion of yield surface, as a basic ingredient, is not involved. The formulation is developed initially in a material setting and then is extended to a covariant one by applying some basic elements and results from the tensor analysis on manifolds. By introducing the material (intrinsic) metric as a primary internal variable, accounting for both rate dependent and rate independent phenomena within the body, a constitutive model is proposed. The ability of the model in simulating several patterns of the complex response of metals under quasi – static and dynamic loadings is assessed by representative numerical examples, after appropriate approximations of the Lie derivatives of tensorial quantities have been derived.

000016027 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000016027 653__ $$aInternal Variables, Finite Deformations, Characteristic Times, Generalized Plasticity, Viscoplasticity, Covariance, Material Metric, Lie Derivative, Loading Unloading Conditions, Time Discretization, Backward Euler, Predictor Corrector Algorithm.

000016027 7112_ $$aCOMPDYN 2013 - 4th International Thematic Conference$$cIsland of Kos (GR)$$d2013-06-12 / 2013-06-14$$gCOMPDYN2013
000016027 720__ $$aPanoskaltsis, V.$$iSoldatos, D.
000016027 8560_ $$ffischerc@itam.cas.cz
000016027 8564_ $$s758206$$uhttps://invenio.itam.cas.cz/record/16027/files/2136.pdf$$yOriginal version of the author's contribution as presented on CD, section: SC-MS 12 NUMERICAL IMPLEMENTATION ON CONSTITUTIVE MODELS
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000016027 962__ $$r15525
000016027 980__ $$aPAPER