Energy absorption behaviors of trapezoid origami boxes with curved-creases

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-04-24 DOI:10.1016/j.tws.2025.113355

Chenhao Teng, Zhichao Cai, Zhibo Song, Wenlong Lu, Jiayu Chen, Caihua Zhou, Peng Hao

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引用次数: 0

Abstract

Compared with conventional square crash boxes, origami crash boxes demonstrate superior potential for widespread application because they can generate several times as many traveling plastic hinge lines (TPHL) as conventional ones, increase the plastic deformation area of the crash box, and greatly improve the energy absorption performance. However, for origami crash boxes, the increase in the number of TPHLs restricts their movement range. Consequently, it becomes difficult for ductile deformations with high energy absorption expressiveness to occur within the origami crash boxes, making it challenging to further enhance the energy absorption performance. Therefore, an innovative curved-crease design method is proposed in this paper. Due to the effect of the curved crease design, the curved crease can lead origami creases to change into TPHLs at the position of maximum curvature and produce a larger ductile deformation area. Through deformation mechanism analysis, compression experiments, numerical simulations, and theoretical analysis of trapezoidal origami crash boxes with curved-creases (TCB-ρ), it can be verified that the curved-crease design not only guides the crash box to generate multiple traveling plastic hinge lines but also further expands the in-plane ductile deformation. Moreover, multiple numerical simulation results indicate that the curved-crease design can decrease the F_max, enhance the F_ave, and ensure a stable energy absorption process in origami crash boxes. The curved-crease ρ and dihedral angle θ of the TCB-ρ have a significant effect on crashworthiness.

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弯曲折痕梯形折纸盒的吸能特性

与传统的方形碰撞盒相比，折纸碰撞盒可以产生数倍于传统碰撞盒的移动塑性铰线（TPHL），增加碰撞盒的塑性变形面积，大大提高吸能性能，具有更大的推广应用潜力。然而，对于折纸碰撞盒，tphl数量的增加限制了它们的移动范围。因此，具有高能量吸收表现力的塑性变形难以在折纸碰撞盒内发生，进一步提高吸能性能是一项挑战。为此，本文提出了一种新颖的曲线折痕设计方法。由于弯曲折痕设计的影响，弯曲折痕可以使折纸折痕在曲率最大的位置转变为tphl，产生较大的延性变形面积。通过对带有弯曲折痕（TCB-ρ）的梯形折纸碰撞盒的变形机理分析、压缩实验、数值模拟和理论分析，验证了弯曲折痕设计不仅引导碰撞盒产生多条可移动的塑性铰线，而且进一步扩大了碰撞盒的面内延性变形。多个数值模拟结果表明，弯曲折痕设计可以降低折纸碰撞盒的Fmax，提高Fave，保证折纸碰撞盒稳定的能量吸收过程。TCB-ρ的弯曲折痕ρ和二面角θ对耐撞性有显著影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.