Control of transient thermoelastic displacement in a composite disk

Control of displacement in a composite disk subjected to axisymmetric heating is investigated. The disk consists of a transversely isotropic structural layer to which is bonded a layer of piezoceramic material of crystal class 6mm. First, a solution procedure based on potential functions is used to analyze the elastic and electric fields induced in the disk when a transient ambient temperature acts on the free surf ace of the structural layer. Then a transient distribution of electric potential across the piezoelectric layer is determined such that the resultant displacement at the surface of the structural layer has a prescribed distribution. Numerical results are obtained for the resulting thermal, elastic, and electric fields.