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Quasistatic propagation of steps along a phase boundary. (English) Zbl 1160.74397

Summary: We study quasistatic propagation of steps along a phase boundary in a two-dimensional lattice model of martensitic phase transitions. For analytical simplicity, the formulation is restricted to antiplane shear deformation of a cubic lattice with bi-stable interactions along one component of shear strain and harmonic interactions along the other. Energy landscapes connecting equilibrium configurations with periodic and non-periodic arrangements of steps are constructed, and the energy barriers separating metastable states are calculated. We show that a sequential one-by-one step propagation along a phase boundary requires smaller energy barriers than simultaneous motion of several steps.

MSC:

74N20 Dynamics of phase boundaries in solids
74N05 Crystals in solids
80A22 Stefan problems, phase changes, etc.
Full Text: DOI

References:

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