Dynamic response of a cracked piezoelectric ceramic under arbitrary electro-mechanical impact

The dynamic response of a cracked piezoelectric ceramic under in!plane electric and anti!plane mechanical impact is investigated by the integral transform method[ The electric and mechanical loads are assumed to be arbitrary functions of time[ It is shown that the dynamic crack!tip stress and electric displacement _elds still have a square!root singularity[ Numerical computations for the dynamic stress intensity factor show that the electric load has a signi_cant in~uence on the dynamic response of stress _eld[ On the other handthe dynamic response of the electric _eld is determined solely by the applied electric _eld[ The electric _eld will promote or retard the propagation of the crack depending on the time elapsed since the application of the external electro!mechanical loads