A new approach is presented to evaluate the singularity orders in the piezoelectric notch tip under anti-plane loading.Firstly,the displacement field at the notch tip is expanded as the power series asymptotic expansions,and the stress equilibrium equation and the charge conservation condition are turned into the characteristic equations with respect to the singularity orders.Then,the boundary conditions on the notch surfaces and the compatibility conditions on the bonded interface are transformed into the ...