J. Phys. IV France 05 (1995) C2-471-C2-476
Experimental Studies, Modelling and Simulation of the Hysteresis in SMA Single Crystals : The σ, ε, T and t Coordinate SpaceA. Isalgue1, F.C. Lovey2, J.L. Pelegrina2, C. Rogueda1 and V. Torra1
1 DFA, ETSECCPB/ETSAB, UPC, Campus Nord B-4, E-08034 Barcelona, Spain
2 Centro Atómico Bariloche, 8400 S.C. de Bariloche, Argentina
The behaviour of global and partial loops (stress-strain-temparature) in SMA single crystals was investigated. Marquardt's based numeric algorithms were developed for the identification of relevant physical parameters (time independent). In addition, the time-dependent effects like static and dynamic recoverable creep, β-recovery, quenching and or up-quenching effects, were evaluated. The constructed model permits the computer simulation of the global and partial hysteresis cycles in the four dimensional σ,ε T and t coordinate space. The simulated curves are in excellent agreement with the experimental results.
© EDP Sciences 1995