![]() It is noteworthy that the introduction of origami patterns to thin-walled tubes can increase manufacturing complexity. Among origami-inspired structures introduced by research group Wang was an OCB typical origami patterns, which will be further investigated in this paper. Inspired by origami art, research group You and Wang developed a series of origami-based tubes to control the collapsed mode and meet crashworthiness criteria needs during crushing. Many researchers introduced different geometrical defects on the surface of the thin-walled tubes to minimize the initial peak and increase the energy absorption. The initial peak force and energy absorption have been heavily employed to evaluate the performance of thin-walled structures. Based on the super folding element theory, Chen and Wierzbicki studied and derived the analytical model of multi-cell columns. Hanefi and Wierzbicki derived the mean crushing force and the length of the local folding wave based on Alexander’s theory to investigate the collapse of externally composite reinforced metal tubes. Modern materials such as plastic, metal, and fiber-reinforced composite have been widely used to manufacture thin-walled tubes. Wierzbicki and Abramowicz presented a self-consistent theory and constructed a basic folding mechanism to obtain the mean crushing force of thin-walled rectangular columns. In this paper, OCB is used to carry out research.Įxtensive studies on thin-walled structures have so far been carried out through experimental, theoretical, and numerical methods. It can be seen from the figure that the SEA performance of origami crash box (OCB) is the best. Figure 1 compares the specific energy absorption ( SEA) and crushing force efficiency ( CFE) of various energy-absorbing boxes with different structures. As one of the new types of thin-walled tubes, origami-based tubes have attracted considerable attention because they can be designed to guide the collapse following the pre-manufactured pattern and improve the energy absorption performance. Over the past few decades, a number of thin-walled tubes with different structures have been widely investigated, including corrugated tubes, folded tubes, grooved tubes, concave tubes, honeycomb structures, and lattice structures. Due to light weight, excellent energy absorption, and low manufacturing costs, thin-walled tubes are widely used in vehicle engineering. A common design approach to enhance the crashworthiness of a vehicle is to install energy absorption devices which deform and absorb kinetic energy during a low-speed collision. In transport vehicle design, many efforts have been made in the past decades to improve the crashworthiness of the structure which is the ability to absorb impact energy in a controlled manner and decrease the injuries through crash events.
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