Experimental and numerical study of Energy Absorption in foam filled Trapezoidal Compound core sandwich panels subjected to quasi-static loading.

The aim of this research work is to investigate the mechanical properties of double layer trapezoid-shape corrugated core sandwich structures under quasi-static loading conditions and to determine the failure mechanisms and energy-absorbing characteristics of the corrugated cores. In this investigation, influence of foam filling technique in double layer trapezoid-shape corrugated core by using lightweight rigid polyurethane foam is investigation. Five types of Aluminum corrugated cores both bare and foam-filled were subjected to unidirectional quasi-static compression. In the following, using numerical simulation by Abaqus software to evaluation the impact parameters, including Specific Energy Absorption (SEA) as discussed testing purposes. the energy absorbing system can be used in the aerospace industry, shipbuilding, automotive, railway industry and elevators to absorb impact energy. The FEM results are compared with Experimental results which reveal a good conformity. FEM and experimental results showed that foam filling technique can significantly increase specific absorbed energy. Finally, appropriate geometric parameters and the best examples of criteria considered with respect to the objectives, are introduced.