Simulation study on the anti-penetration performance and energy absorption characteristics of honeycomb aluminum sandwich structure

This work studied the anti-penetration performance and energy absorption characteristics of the honeycomb aluminum core structure. Tests of penetrating depth were conducted. The response and deformation resistance of the aluminum sandwich structure with a regular hexagonal honeycomb were studied through numerical simu-lation. The effect of the face/back plate thickness ratio and the shape of the core layer unit on the performance of the aluminum sandwich structure with a regular hexagonal honeycomb were compared and analyzed with a theoretical model of equivalent target calculation. Based on the results, the aluminum sandwich structure with a regular hexagonal honeycomb has the strongest anti-penetration capability when the thickness ratio of the face/ back plate is set to 2.5:1. In terms of the energy consumption, the Arrow and concave hexagonal honeycomb aluminum sandwich structures are 14.7% and 25.9%, respectively, than the aluminum sandwich structure with a regular hexagonal honeycomb. The typical hierarchical honeycomb aluminum sandwich structure has better energy absorption characteristics than the aluminum sandwich structure with a regular hexagonal honeycomb. Therefore, the anti-penetration performance of the honeycomb aluminum sandwich structure can be improved by adjusting the thickness ratio of the face/back plate and changing the shape of the core layer. The research results are of great significance in guiding the design of the honeycomb aluminum sandwich structure.

Automated summary

This study investigated the anti-penetration performance and energy absorption characteristics of honeycomb aluminum core structure. Through tests and numerical simulations, it was found that the aluminum sandwich structure with a regular hexagonal honeycomb had the strongest anti-penetration capability with a face/back plate thickness ratio of 2.5:1. The Arrow and concave hexagonal honeycomb aluminum sandwich structures showed a higher energy consumption than the regular hexagonal honeycomb structure. The hierarchical honeycomb aluminum sandwich structure exhibited better energy absorption characteristics. Therefore, adjusting the thickness ratio and changing the core layer shape can improve the anti-penetration performance of the honeycomb aluminum sandwich structure.