摘要
A class of problems concerning subinterface cracks interacting with the interface in metal/piezoelectric ceramic bimaterials are studied. The interaction problem is reduced to a system of integral equations with the aid of the pseudo-traction-electric-displacement method.The equations are solved numerically,and the stress intensity factor,the electric displacement intensity factor and the mechanical strain energy release rate are evaluated.Numerical results of a Cu/PZT-4 bimaterial are given and shown in figures,in which three kinds of remote loading conditions are considered to make comparisons.It is found that the electric loading at infinity plays a quite important role in the present interaction problem.In addition,a conservation law of the first component of the Jk-integral vector is found,which does lead to a consistency check to confirm the effectiveness of the PTEDM as well as the numerical results derived in this paper.
A class of problems concerning subinterface cracks interacting with the interface in metal/piezoelectric ceramic bimaterials are studied. The interaction problem is reduced to a system of integral equations with the aid of the pseudo-traction-electric-displacement method. The equations are solved numerically, and the stress, intensity factor, the electric displacement intensity factor and the mechanical strain energy release rate are evaluated. Numerical results of a Cu/PZT-4 bimaterial are given and shown in figures, in which three kinds of remote loading conditions are considered to make comparisions. It is found that the electric loading at infinity plays a quite important role in the present interaction problem. In addition, a conservation law of the first component of the J k-integral, vector is found; which does lead to a consistency check to confirm the effectiveness of the PTEDM as well as the numerical results derived in this paper.
