The activities of LMARC are based on multiaxial mechanical experiments on SMA alloys such as TiNi and CuZnAl (tension (compression) - torsion - internal pressure). From these, phenomenological macroscopical models in the frame of thermodynamics of irreversible process are set up for pseudoelasticity.
The effort in this sense will be directed to 3D tension or compression on cubes of CuAlBe in the range of pseudoelasticity.
In addition, a tentative of observation ``in situ'' of the appearence (disappearance) of martensite platelets inside the parent phase (austenite) under loading will be performed. To this aim, a biaxial tensile machine is being set up in order to load a single crystal plate of CuZnAl.
First of all, an experimental analysis of the martensitic transformation will be done. Taking into account these informations for proportional and non proportional loadings, micro-macro modeling will be improved.
For structure determination, a kinematical frame for finite strain computation permits a consistent numerical modeling. A new three-nodes-shell finite element for thin films allows to avoid locking in shearing.
Experiments will be performed on beams under bending and on thin films with or without substrate under bulging tests. Then, experimental datas will permit to fit the finite element calculations.