Imperfection Sensitivity of Skewed FG Flat Plates Under Dynamic Loading

Abstract

This paper presents the imperfection sensitivity of skewed functionally graded (FG) flat plates under dynamic loading. The material properties are assumed to be varied along the thickness direction. The plate kinematic is assumed according to Reddy’s higher-order shear deformation theory (HSDT). A function causing the imperfection is considered in the transverse direction. The governing differential equation is assessed using Lagrange’s equation. The numerical results are ascertained using the finite element method (FEM) conjointly with the Newmark integration technique. A nine-nodded C0 continuous isoparametric finite elements are employed to attain the dynamic response efficiently. The convergence and comparison tests are accomplished to validate the performance of the proposed model. Parametric study is also performed by taking different parameters like volume fraction index, imperfection amplitude, and skew angle. The present study concludes that the skewness and imperfection significantly affect the structural response.