Magneto-electro-elastic antiplane analysis of a bimaterial BaTiO3-CoFe2O4 composite wedge with an interface crack

The antiplane analysis is made for a bimaterial BaTiO3-CoFe2O4 composite wedge containing an interface crack. The coupled magneto-electro-elastic field is induced by the piezoelectric/piezomagnetic BaTiO3-CoFe2O4 composite materials. For the crack problems, the intensity factors of stress, strain, electric displacement, electric field, magnetic induction and magnetic field at crack tips are derived analytically. Also, the energy density criterion is applied to predict the fracture behavior of the interface crack. The numerical results also show that the energy release rate for a crack in a single wedge is negative.