ABSTRACT
This study examines the eigenfrequencies of biaxial functionally graded panels. The heterogeneous material properties are evaluated using two different homogenization schemes, namely Voigt’s rule-of-mixture and Mori-Tanaka, via power-law function, whereas the volume fractions are considered to be the function of in-plane coordinates (x, y). The strain field is based on the equivalent single-layer higher-order kinematics. To govern the equilibrium equations, Hamilton’s principle is utilized. The finite element equations are obtained using 2D isoparametric finite element approach with quadrilateral Lagrangian elements. The convergence and validation studies are carried out to ensure the consistency and correctness of the developed computational model. Additionally, 3D finite element model of biaxial functionally graded composite structure is also developed using commercially available software for further verification. Various numerical examples are presented to demonstrate the impact of various geometrical, material, and support conditions on the eigenfrequencies of biaxial functionally graded composite panel structure.
