Mesoscopic model of phase transformations at finite strain rates with continuum plasticity and nonclassical heat transfer

0354825 - ÚFM 2011 RIV US eng C - Conference Paper (international conference)
Gröger, Roman - Lookman, T.
Mesoscopic model of phase transformations at finite strain rates with continuum plasticity and nonclassical heat transfer.
Macro to Nano-scale Inelastic Deformation and Failure of Materials & Multi-scale Modeling. Fulton, Maryland: NEAT Press, Inc, 2011 - (Khan, A.), s. 1-3. ISBN 0-9659463-1-2.
[International Symposium on Plasticity and its Current Applications /17./. Puerto Vallarta (MX), 03.01.2011-08.01.2011]
Institutional research plan: CEZ:AV0Z20410507
Keywords : phase transformation * microstructure * strain rate * temperature
Subject RIV: BM - Solid Matter Physics ; Magnetism

We develop a mean-eld model that can be used to study the evolution of microstructure in dynamically loaded crystalline materials. The Landau-Ginzburg func- tional and Rayleigh dissipation function are used to describe the thermoelastic and viscoelas- tic response of the body. A nonclassical heat conduction equation is derived to describe the propagation of the heat inside the body. The plasticity is introduced by the rate-dependent fully implicit backward Euler return mapping scheme with a phenomenological isotropic hardening. Within this model, the complex microstructural changes are consequences of the given Landau free energy functional, nite strain rates, heat conduction, and plasticity.
Permanent Link: http://hdl.handle.net/11104/0193740