Abstract
A hybrid sandwich panel with lightweight core composed of corrugated core and metallic foam were designed. The dynamic responses of this hybrid sandwich panels were numerically investigated under combined loading of blast and fragments by LS-DYNA software. To simulate this loading condition, the TNT charge was used to drive prefabricated fragments. The developed numerical approach was validated by using the existing experimental results. The effects of foam layer location, foam density, back plate configuration and stand-off distance on the dynamic response were systematically analyzed. The results indicate that the hybrid sandwich panels with corrugated and foam separation demonstrate higher protective capability. Compared with the foam-filled corrugated sandwich panels, the energy absorption is increased by up to 16.3%. Increasing the foam density can enhance the impact resistance of the structure under combined loading of blast and fragments. The back plate with composite plate has better anti-fragmentation ability than the steel plate.
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