Sandwich panel with honeycomb-corrugation hybrid core: evaluation of concept

Abstract eng:
The concept of novel lightweight sandwich construction with honeycomb-corrugation hybrid core is evaluated The hybrid core is manufactured by filling the interstices of aluminum corrugations (folded plates) with precision-cut trapezoidal aluminum honeycomb blocks, bonded together using epoxy glue The out-of-plane quasi-static compressive performance of such hybrid-cored sandwich panels is experimentally and numerically investigated Both the compressive strength and energy absorption capacity of the sandwich are dramatically enhanced, compared to those of a conventional sandwich with empty corrugation or single honeycomb core having similar mass, The enhancement is attributed to strong constraints caused by honeycomb-corrugation interaction on deformation and buckling as well as altered failure modes at large deformation.

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