With the rapid development of information technology, the track densities and data rates in magnetic recording devices become higher. To achieve high track density, the develop-ment of dual-stage actuators using conventional voice coil motor as a primary stage and some sort of microactuator device located between the pivot of the voice coil and the read/write head has continued in both industry and academia. The devices have varied in their method for electrical to mechanical energy conversion and in their... With the rapid development of information technology, the track densities and data rates in magnetic recording devices become higher. To achieve high track density, the develop-ment of dual-stage actuators using conventional voice coil motor as a primary stage and some sort of microactuator device located between the pivot of the voice coil and the read/write head has continued in both industry and academia. The devices have varied in their method for electrical to mechanical energy conversion and in their location in the mechanical structure of actuator sys-tem. One of methods of energy conversion from electrical energy to mechanical one is based on piezoelectric effects. Researchers have been trying to design large displacement and high band-width piezoelectric actuators for high densities magnetic disk drives, so the research on their electromechanical-coupled characteristics is very important.Based on the two-dimensional constitutive equations of piezoelectric and elastic materials, this article presents an analytical solution of displacements and stresses to the electro-mechanical in-teraction of a piezoelectric actuator with split electrode under the static anti-parallel electric fields after the boundary conditions at free end are dealt with by means of the Saint-Venant's assump-tion, and the semi-inverse method of solution to an elastic body is employed. By comparing the obtained analytical solution with one of numerical solutions, e.g., a finite element solution, to the problem without using the Saint-Venant's assumption, i.e., the numerical solution to the prob-lem with the point-by-point satisfied boundary conditions, it is found that the characteristics of electro-displacements at the free end from the analytic solution is almost coincident with those from the finite element solution, which shows that the analytic solution presented in this paper is efficient and reliable. |