تحليل كمانش پوسته هاي استوانه اي پيزوالكتريك داراي تغيير شكل اوليه، تحت بارگذاري هاي الكترومكانيكي بر پايه يك تيوري مرتبه بالا

In the present paper, static buckling of circular cylindrical piezoelectric shells with initial radial deflections is investigated. A high order theory is used to consider the transverse shear deformations effects. Therefore, the presented formulations are valid for both thin and thick shells. In contrast to previous works developed by other researchers, the governing equations are neither linearized nor simplified by semi-analytical methods to reduce the problem to an eigen value problem. Buckling load is determined using a modified Budiansky criterion. In the high order formulations proposed so far, the free and the simply supported boundary conditions were applied in an approximate manner. Using a Hermitian finite element formulation for the lateral displacements, various boundary conditions are exactly incorporated in the present paper. As a first step, bending analysis results of the present formulations are compared with the available results of the other references, for validation purposes. Finally, influence of application of electric potential to the internal and external surfaces of a piezoelectric shell on the buckling load is investigated.