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Abstract. Thin-walled tubes are widely used as energy absorptiondevices for their low cost and high manufacturability. Introduction of theorigami technique enables the tube to follow a pre-determined failure modeand to improve its energy absorption efficiency. This paper examines theenergy absorption characteristics of the origami crash box underquasi-static axial crushing. Both experimental and numerical results showthat the origami pattern develops a diamond-shaped mode, bringing areduction in initial peak force and a significant increase in energyabsorption compared to the conventional hexagonal tube. The sensitivity ofits energy absorption performance to various parameters is studied, and itis shown to achieve 68.29 % increase in the specific energy absorption and13.91 % reduction in the initial peak force in the optimal case.Furthermore, an analytical solution is presented for the energy absorption,which achieves reasonable agreement with the numerical results.

Quasi-static axial crushing of hexagonal origami crash boxes as energy absorption devices