Multi-directional crushing characteristics of curved origami metamaterials with glass fiber-reinforced polyamides

This paper investigates the crushing characteristic of a novel curved Miura-ori metamaterial (CMM) with glass fiber-reinforced polyamides under multi-directional crushing loads. Based on the experimental test and nu-merical analysis, the deformation mechanism, crushing stress and energy absorption capability of the CMM are explored under multi-directional (0 degrees, 10 degrees, 20 degrees, 30 degrees) crushing loads. The progressive deformation mechanism of CMM with graded origami crease (CMM-G) is demonstrated, which follows its origami creases and exhibits high energy dissipation efficiency and load-bearing capability. There are worthy crushing merits in the CMM-G compared with CMM with uniform origami crease under multi-directional crushing loads, where the specific energy absorption of CMM-G improves by 24.93% under 0 degrees crushing load. Moreover, the influence of geometric configurations of CMM-G is positive on crushing behavior. The deformation mode, load-bearing level and energy dissipation efficiency are sensitive to the origami amplitude A, the number of origami crease Nz and gradient coefficient e of the CMM-G under multi-directional crushing loads. This paper illustrates the valuable mechanical performance of curved origami metamaterial with gradient and composite reinforcement, which opens wide potential applications as energy absorbers or load-bearing devices.

Automated summary

This paper investigates the crushing characteristic of a novel curved Miura-ori metamaterial (CMM) with glass fiber-reinforced polyamides under multi-directional crushing loads. The deformation mechanism, crushing stress and energy absorption capability of the CMM are explored. The progressive deformation mechanism of CMM-G is demonstrated, which exhibits high energy dissipation efficiency and load-bearing capability. The geometric configurations of CMM-G positively influence its crushing behavior, making it suitable for applications as energy absorbers or load-bearing devices.