Crashworthiness of vertex based hierarchical honeycombs in out-of-plane impact

As a class of widely observed materials in nature, hierarchical micro structures maybe of superior mechanical properties. In this study, we incorporate the concept of hierarchy into honeycomb structures for enhancing their crashworthiness performance. Hierarchical honeycombs are constructed by replacing every vertex of a regular hexagonal network with a smaller hexagon topology and repeating this process for constructing fractal-appearing...