GEOMETRICALLY NON-LINEAR BENDING ANALYSIS OF PIEZOELECTRIC FIBER-REINFORCED COMPOSITE (MFC/AFC) CROSS-PLY PLATE UNDER HYGROTHERMAL ENVIRONMENT

摘要

A finite element formulation for geometrically non-linear bending behavior of smart structures integrated with piezoelectric fiber-reinforced composite (AFCIMFC) layer acting as distributed actuator is presented in this article. The formulation of this hygro-thermo-electro-mechanical coupled problem is based on the first-order shear deformation theory (FSDT) and the von Karman type geometric non-linearity. Resulting non-linear algebraic governing equations are linearized by Newton-Raphson iterative method. A developed finite element formulation is initially solved for validation and comparison with existing results. A wide variety of numerical examples considering cross-ply laminated substrates subjected to combined mechanical, hygrothermal and electrical loads are presented. The effect of piezoelectric fiber orientation in an actuator to counteract non-linear deflections is analyzed.