An experimental study and finite element analysis of the parametric of circular honeycomb core

This paper experimentally and numerically investigated the impact test response and characteristics of circular honeycomb cores. The experiments were conducted on two different structures of aluminum-tube honeycomb core, square structure and star structure. The specimens were tested in order to find energy absorption, specific energy absorption, and crashworthiness behaviors. The results revealed that circular honeycomb cores with star structure could resist higher impact load than circular honeycomb cores with square structure. In addition, the larger tubes showed a lower impact load the smaller tubes. It was also revealed that the greater the collapse distance of the aluminum-tube honeycomb core, the lower the load. Moreover, FEA simulation results, through ABAQUS.CAE, were compared to the experimental results. The results revealed that good agreement was achieved between the experimental results and the FEA results. The comparison results showed that the difference in maximum load between experimental and FEA model was 0.47-11.84%, which is a reliable analysis result. In terms of energy absorption and specific energy absorption, the difference in maximum load between experimental and FEA model was 23.54% and 16.23%, respectively.