This M2 level course is an introduction to the behavior of active solids, i.e. solids with coupled thermo-mechanical and electro-magnetic properties. Examples of such materials include piezo-electric and magneto-elastic solids, shape memory alloys and polymers and their applications in sensors and adaptive structures. The mechanical response of these active materials exhibits a strong coupling with other fields, such as temperature, electric and magnetic fields, often due to displacive (matensitic) phase transformations at their atomic lattice level. Such couplings can be exploited in passive and active ways to realize novel adaptive structures. This also leads to nonlinear behavior, instabilities, and other subtleties that require a multidisciplinary understanding of these phenomena. Two main topics will be covered: a) finite strain piezo-electricity and magneto-elasticity and b) continuum and atomistic models for shape memory alloys with emphasis on bi-atomic lattices, motivated by NiTi applications.
Dernière mise à jour : vendredi 10 février 2012