ON INTERFACE CRACK INVESTIGATION IN A PIEZOELECTRIC/ PIEZOMAGNETIC BIMATERIAL UNDER ELECTRO-MAGNETO-MECHANICAL LOADING

摘要

A plane problem for an interface crack with a contact zone between two semi-infinite piezoelectric/piezomagnetic spaces under the action of mechanical loading, magnetic and electric fluxes is considered. Two cases of magneto-electric conditions at the crack faces are considered. First case assumes that the crack is electrically and magnetically permeable, and in the second case the crack is assumed electrically permeable and magnetically impermeable. In both cases the problems is reduced to the combined Dirichlet-Riemann boundary value problems and their analytical solutions are found. Stresses, electric and magnetic displacements as well as their intensity factors are found in a simple analytical form. A bimaterial BaTiO_3-CoFe_2O_4 with different volume fractions of BaTiO_3 has been used for a numerical illustration of the obtained results