FSDT electro-elastic analysis of FG-CNTRC cylindrical three-layered pressure vessels with piezoelectric face-sheets

摘要

This study presents two-dimensional electro-elastic analysis of functionally graded carbon nanotubes reinforced composite (FG-CNTRC) cylindrical pressure vessels integrated with piezoelectric face-sheets as sensor and actuator based on the first-order shear deformation theory (FSDT). The cylindrical pressure vessel is subjected to thermal, electrical, and mechanical loads while is resting on Pastemak's foundation. The core is made of FG-CNTRC with different distributions of carbon nanotubes. Effective material properties are calculated based on the rule of mixture for various distributions of reinforcements. The governing equations of the problem are derived based on the principle of virtual work and are solved using the eigenvalue-eigenvector method for clamped-clamped boundary conditions. The accuracy and trueness of present method are justified using comparison of present numerical results in special cases with results of previous works. The numerical results including radial and axial displacements, rotations, normal, and shear stresses are presented in terms of significant inputs of the problem such as CNT patterns, volume fraction of CNTs, applied electric potential, and the Pasternak's coefficients.