4th International workshop on nonequilibrium thermodynamics and complex fluids

	IWNET 2006	4th International workshop on nonequilibrium thermodynamics and complex fluids 3-7 september 2006, Rhodes, Greece

Home Scope Location Speakers Program Abstracts Author index Organizing Committee Scientific Committee Venue & Accomodation Registration News Contact		ORAL PRESENTATION Session: 5 Non-equilibrium thermodynamics: Approaches and formalisms (scheduled: Wednesday, 10:20 ) Nonequilibrium thermodynamics of elasto-viscoplastic deformation M. Hütter, T.A. Tervoort, H.C. Öttinger Department of Materials, ETH Zurich, Switzerland Plasticity theories describe the transition from compressible elastic behavior at low stress to isochoric plastic deformation at high stress levels, and are often formulated by relating the elastic strain rate to an objective stress rate. In this contribution, the modeling of such behavior by way of nonequilibrium thermodynamics is examined, namely by using the GENERIC formalism. First, nonisothermal general elasticity is formulated in terms of the left Cauchy-Green strain tensor, the temperature, and the momentum density. In a second step, we study specific relaxation mechanisms of the strain tensor to describe elasto-viscoplastic behavior with emphasis on volume relaxation, and discuss the relation to common inelastic deformation models. For various equations of state, predictions of the model for specific mechanical tests are presented. © IWNET 2006

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