This study proposes a type of trabecular-honeycomb biomimetic structures (BEP crash box) with high-efficiencyenergy-absorbing abilities inspired by beetle elytra. A comparison between the BEP crash box and conventionalcrash box (a buffering structure generally used in modern devices and vehicles) is conducted using compressionexperiments. We present the following results. 1) In contrast to the fluctuation stage with a low force in aconventional crash box, the force-displacement curve of the BEP crash box with A=0.75 possesses a rising stageand an approximate plateau with a higher force; as a result, the absorbing energy ability and compression forceefficiency are about 3.4 and 3.2 times greater than those of a conventional crash box with A=0.5, respectively, inthis experiment. 2) Experimental comparisons reveal that there is cracking failure in the conventional crash box,however, the coordinated and uniform laminated compression deformation is developed in the BEP crash box.These results provide new inspiration for applying BEP crash boxes and exploiting new buffering structures andmaterials in the energy-absorbing field.
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