Flexural Behavior of Perforated Functionally Graded Composite Panels under Complex Loading Conditions: Higher-Order Finite-Element Approach

The flexural behavior of functionally graded composite panels with single and multiple rectangular perforations is examined subjected to complex loading conditions, including uniform/sinusoidal pressure and uniform/linear/nonlinear thermal field. The constituent materials are assumed to be temperature-dependent, whereas the instantaneous material properties are evaluated using the power-law function via Voigt's homogenization scheme. Here, the displacement field is based on the equivalent single-layer higher-order kinematics with nine degrees of freedom. The equations of motion are obtained using minimum total potential energy principle and isoperimetric finite-element approximations via Lagrange elements. The mesh convergence test is carried out to show the stable and appropriate mesh density; however, to check the correctness, the present solution is compared with the benchmark solutions. In addition, new numerical examples are presented to demonstrate the effect of different parameters, such as the number of perforations, power-law coefficients, aspect ratios, loading, and edge conditions on the deflection responses of perforated functionally graded composite panels.