Tomas Roubicek, Charles University, Prague
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Modelling of rate-independent martensitic transformation
processes in shape-memory alloys.
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A short abstract:
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Models of rate-independent martensitic phase transformation in
shape-memory alloys based on continuum-mechanical description of the
stored energy in such alloys will be presented. A multi-well character of
the stored energy gives rise to a microstructure described either
conventionally or, with a certain approximation, by special
gradient Young measures. A rate-independent phenomenological
dissipation is then considered to model a hysteretic response.
Isothermal simulations with NiMnGa or CuAlNi single crystals
exhibiting respectively cubic-to-tetragonal or cubit-to-orthorombic
phase transformation will be presented, too.