Identification of Damage Size Effect of Natural Frequency on Sandwich Material using Free Vibration Analysis

One of the most innovative developments in field advanced materials is sandwich materials. Sandwich material applications need standard requirements to be applied marine structures, especially on ship construction. research conducted a laboratory scale obtain appropriate composition its development. In process developing this material, can damaged. Most damage occurs core which results difficulties identification process. This study compares methods based free vibration analysis side plate ship’s hull. Damage-based carried out determine response that occurs. Moreover, method uses numerical approach and experimental measurement. Numerical modelling used boundary conditions shifted Damage assumes experiences failure with numerous variation model. Quantification correlates natural frequency reduction due decrease stiffness material. Hence, difference deviation value accuracy identification.