Evaluation of Free Vibration Analysis of EPS Filled Syntactic Foam Core

Sandwich structures using foam as core material are widely used in engineering applications such as aircraft, automotive, marine and construction. Therefore, for the design of these engineering applications is in need of free vibration analysis results. In this study, free vibration behavior of new designed EPS filled syntactic foam core was investigated with experimental approach. Syntactic foam core was prepared using epoxy resin, glass microballoons (GMBs) and expanded polystyrene (EPS). The influences of density on the free vibration performance for new designed the core were evaluated. The natural frequencies and damping ratios of the samples were investigated under boundary conditions as fixed- free. The vibration tests were performed with the PULSE vibration measurement system using the impulse frequency response technique. Finally, the natural frequencies and damping ratio of EPS filled syntactic foam core were obtained and discussed.