Effect of various parameters on delaminated actuators with piezo-beams

Several researches treated last years the introduction of the piezoelectric actuators in the engineering domains, and studied its behaviors under the effect of many parameters. A bimorph beam made of two piezoelectric layers with a delamination zone between them is studied using the FOSDT (First Order Shear Deformation Theory), the F. E. M. to modeling the problem, the obtained equation of motion are solved using Newmark method and Matlab to establish the calculations. A piezoelectric actuator made of a PVDF bimorph beam, and subjected to a delamination zone between its upper and lower layers is considered to study the influence of several parameters. Like the changes of the ambient temperature, the structural damping coefficient and some geometrical parameters. Using the FOSDT to model the axial and vertical displacements of this actuator, we used the F.E.M. method to discretize the beam. The delaminated beam presents more actuation than the perfectly bonded one.