Comparison study of the in-plane crushing failure behavior of traditional and arc-curved hexagonal honeycomb

Abstract

The honeycomb structures have been widely adopted as the aerospace engineering for the impact dynamic performance. To reveal the in-plane crushing behavior and improve the energy absorption ability, the influence of typical parameters including impact velocity and geometrical factors including central angle of arc-curved hexagonal honeycomb on the impact dynamic are investigated. The impact dynamic performance of traditional honeycomb structure is studied under different impact velocity and wall thickness. The deformation behavior of arc-curved hexagonal honeycomb with in-plane impact is researched. Results show that three typical deformation model including Ⅰ, V and X shape are exhibited for traditional and arc-curved types. The deformation model would transfer from X to Ⅰ shape with the increasing of impact velocity, and the impact load would be more unstable. With the increasing of central angle of arc-curved hexagonal honeycomb, the global deformation occurs instead of local deformation including X and V model, and stronger energy absorption ability is exhibited for the larger angle.