<![CDATA[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.]]>
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