About modelling the shape memory alloy behaviour based on the phase transformation surface identification under proportional loading and anisothermal conditions

Based on the experimental identification of the phase transformation surface, a modelling of shape memory alloys anisothermal behaviour is proposed. Within the framework of the thermodynamics of irreversible processes, two internal variables are chosen: the stress-induced martensite volume fraction and the self-accommodating martensite volume fraction. A special attention is paid to take into account the asymmetry between tension and compression behaviours.