TRANSIENT-RESPONSE OF A PIEZOTHERMOELASTIC CIRCULAR DISK UNDER AXISYMMETRICAL HEATING

Transient temperature, displacement, stress and electric field intensi ties in a finite circular piezothermoelastic disk undergoing axisymmet ric surface heating are examined. Exact solutions to the equations of equilibrium and electrostatics are obtained using a potential function approach based upon two piezothermoelastic potential functions, three piezoelastic potential functions and a piezoelectric potential functi on. The disk under consideration is assumed to exhibit hexagonal mater ial symmetry of class 6 mm. The initial temperature of the disk is zer o; thereafter one face is subjected to linear heal transfer from an ad jacent medium (Newton's law of cooling), while the temperature of the other face remains constant. Both faces are taken to be free of tracti on. The cylindrical boundary of the disk is thermally insulated, elect rically charge-free, and constrained against radial deformation. Numer ical results are obtained for the stress and the electric potential di stributions in a cadmium selenide disk.