Influence of spatial static and dynamic inhomogeneities on the distribution of electroelastic fields and electronic processes in piezoceramic composites

The electroelasticity problems for piezoceramic bodies with inhomogeneities were examined. The short review of model situations considered in the previous works of the authors, a piezoceramic body with an internal elliptical crack, a piezoceramic body containing an external elliptical crack, a piezoceramic body with a spherical cavity, was carried out. In all these cases, the coupled electroelastic field in the neighborhood of inhomogeneity for the particular case of static loading was investigated. The formulas to calculate the stress intensity factors were analyzed. The dependences of stresses and electric displacement on the shape of the cavity for the cases of electrical loading and the mechanical loading only were examined. The possibility to apply the obtained results to solving of practical problems, not only static but also dynamic nature, was considered.