International Journal of Innovative Research and Development

Abstract

This paper investigates the Eigen values and Eigen vector of lamina and laminate of composite plates. Lamina plays a significant role in composite laminated structures; as a result, it’s important to select an exact orientation lamina to avoid maximum amplitude.   The structural stiffness and mass matrices were obtained from classical laminated plate theory and non conformal rectangular element theory. The Eigen values and Eigen vectors are derived based on vibration theory. The simply supported square plate element is designed analytically using above theories and computed in MATLAB, the variation of frequency and modes between lamina and laminate were studied for different orientation. Then the element assembled to global element level to study the changes in their vibration and compared. Finally, it also represents the first derivative frequency change with respect to fibre volume fraction and compared.

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