Crushing investigation of crash boxes filled with honeycomb and re-entrant (auxetic) lattices

Abstract

This study investigates the crush response of lattice filled square tubes under quasi-static compressive loading. Auxetic lattice (auxetic strut and re-entrant) filled tubes have been compared to a non-auxetic (honeycomb) filled alternative and an empty tube. All structural lattices within this study were designed to be of equal mass. The experimental results were computationally validated using Abaqus®/Explicit. Experimental and numerical results show good agreement which highlights that the addition of lattice structures greatly improved the crashworthiness performance of the crash tube compared with an empty tube. By comparing the experimental values of energy absorption (EA), through the inclusion of a filler lattice a 62.6%, 64.0% and 79.1% increase over the empty tube were obtained for the auxetic strut, re-entrant and honeycomb structures respectively.

Potential Application of Green Composites for Cross Arm Component in Transmission Tower: A Brief Review

“…From the previous studies [78,79], it can be seen that the filled sandwich structure has currently attracted researchers because of its simple configuration and ease of manufacturing. In order to optimize the composite filled core structure, various fillers have been investigated to seek the optimal combination including foam, honeycomb, lattice-filled, and balsa wood [80][81][82]. Another way to fabricate composite filled structure is by embedding the honeycomb cell with foam, tubes, or even other polymer materials using the concept of a container instead of a filler [83].…”

Analysis of additively manufactured (3D printed) dual-material auxetic structures under compression

“…This mechanism causes auxetic materials to display superior material properties namely impact resistance, fracture toughness and vibration transmission. [3] Studies have been undertaken to develop different auxetic architectures in order to improve the auxetic effect which in turn can improve properties such as the energy absorption [4]- [8]. Some of the most promising geometries are shown in Figure 3 [9].…”

The State of the Art of Material Jetting—A Critical Review

“…MJ was used to produce intricate 3D pentamode structures from FullCure850 VeroGray with minimum and maximum ligament thicknesses of 0.71 mm and 1.32 mm, respectively [ 109 ]. Honeycomb, re-entrant and auxetic structures was also produced from FullCure850 VeroGray material with MJ technology for crashbox applications [ 110 ]. MJ was used to produce dual-material auxetic metamaterials (DMAMs) to increase the mechanical properties and stability of metamaterials.…”