Impact behavior and energy absorption improvement mechanism of vertex-based hierarchical origami honeycomb

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-09-26 DOI:10.1016/j.tws.2025.114030

Nanfang Ma , Sihao Han , Chunlei Li , Buyun Su , Xin Li , Qiang Han , Xiaohu Yao

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引用次数: 0

Abstract

Origami-inspired honeycomb structures have garnered significant research interest in recent years. The re-entrant origami honeycomb (ROH) is proposed by combining the Miura origami and re-entrant honeycomb. The incorporation of origami units can significantly enhance the in-plane mechanical properties of the re-entrant honeycomb but reduces its out-of-plane load-bearing capacity. In this paper, the vertex-based hierarchical design is applied to the conventional ROH to improve the out-of-plane mechanical performance of the structure. The crashworthiness of the conventional ROH and the novel hierarchical re-entrant origami honeycomb (VHROH) is systematically investigated by experimental testing, theoretical analysis and numerical simulation. The results indicate that VHROH structure exhibits significantly enhanced impact resistance and energy absorption in both in-plane and out-of-plane directions compared with ROH structure. An in-depth analysis of the deformation patterns and energy absorption mechanisms elucidates the underlying reasons for the enhanced performance of the VHROH structure. Parametric analysis demonstrated that adjustments to substructure size and folding dihedral angle can effectively regulate the structure’s crashworthiness in both in-plane and out-of-plane directions. In addition, the negative Poisson’s ratio effect of the VHROH structure is diminished compared with that of the ROH structure in both in-plane and out-of-plane directions.

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基于顶点分层折纸蜂窝的冲击性能及吸能改善机理

折纸启发的蜂窝结构近年来获得了重大的研究兴趣。将三浦折纸和可重入蜂巢相结合，提出了可重入蜂巢。折纸单元的加入可以显著提高再入蜂窝的面内力学性能，但会降低其面外承载能力。为了提高结构的面外力学性能，本文将基于顶点的分层设计方法应用到传统的鲁棒结构中。通过实验测试、理论分析和数值模拟，系统地研究了传统折纸蜂窝和新型分层可重入折纸蜂窝的耐撞性。结果表明，与ROH结构相比，VHROH结构在面内和面外方向上都具有显著的抗冲击性能和吸能能力。通过对变形模式和能量吸收机制的深入分析，阐明了VHROH结构性能增强的根本原因。参数分析表明，调整子结构尺寸和折叠二面角可以有效地调节结构在面内和面外方向的耐撞性。此外，在面内和面外方向上，VHROH结构的负泊松比效应都比ROH结构减弱。

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.