Analisis Pengaruh Konfigurasi Lamina Terhadap Kekakuan Glass Fiber Reinforced Plastics

Abstract

The objective of this study is to analyze the influenze of laminae configuration to the stiffness of glass fiber reinforced plastics material withfour laminae configurations, i. e. symmetry angle-ply, symmetry cross-ply, antisymmetry angle-ply, and antisymmetry cross­ pl y. Theanalysis is based on the clasical lamination theory. By using the theory, the value of strain and the curvature on x-axis, y-axis, and shear, and the stress on x-axis, y-axis, and shearfor each lamina with differentfiber orientation would befound. The result of analysis shows that symmetry angle-ply laminae configuration has the highest stiffnesss than the others. In symmetry ange-ply laminae configuration, each laminae is symmetrical to the middle plane of the material. M oreover, there is a change in stacking sequence that actually causes the interlaminar normal stress changesfrom tensile to compressive. Since compressive interlaminar stress would tend to keep the plies together.