“Analysis of Stress and Displacement of Simply Supported Symmetric Cross-Ply [0/90/90/0] Square Laminated Composite Plate Under Sinusoidal Loading Using Finite Element Method”

Abstract

Laminated composite plates are widely used in aerospace, military, civil infrastructure, and automotive sectors for their beneficial attributes, such as excellent fatigue resistance, strong yet lightweight construction, and customizable fiber orientation, materials, and stacking patterns. Therefore, it's crucial to analyze deflections and stress levels in these plates.In this current research, a mathematical formulation based on the higher-order deformation theory (HSDT) is employed, featuring 12 degrees of freedom per node. The focus of the analysis involves studying stress and deflection in four-layer symmetric [0/90/90/0] cross-ply laminate plates under sinusoidal loading. The obtained results are then compared with established findings in existing literature. Furthermore, a parametric investigation is conducted, exploring different side-to-thickness ratios at values of a/h equal to 4, 5, 10, 20, 40, 50, and 100. In this research, the finite element analysis was performed with HSDT using MATLAB software. The deflections were subsequently compared to analytical solutions provided by results from Turvey [11].Detailed results are presented in tables, and they exhibit a high degree of agreement with established standard results,with errors of less than 10%.