In-plane behavior of arc-walled hexagonal honeycombs

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-10-02 DOI:10.1016/j.tws.2025.114053

Shuxin Li , Fukun Xia , Xuefei Wang , Dong Ruan

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引用次数: 0

Abstract

Honeycombs show high specific strength and energy absorption capacity. However, the in-plane dynamic performance of curved hexagonal honeycombs has not been adequately investigated. This study investigates the in-plane compressive behavior of advanced arc-walled hexagonal honeycombs, characterized by additional arc walls and lens-shaped cavities. Finite element models were developed to evaluate the in-plane compressive performance of the proposed honeycombs subjected to in-plane compression. Parametric study was performed to examine the effects of impact velocity, wall thickness, and arc angle on the mechanical behavior of the proposed honeycombs. Three deformation modes, “X”, “V”, and “I”, were identified at low, moderate and high velocities. Plateau stress and energy absorption capacity were improved with the increase in the impact velocity and wall thickness. The arc angle also showed an enhancement effect on the plateau stress, energy absorption (EA) and specific energy absorption (SEA), particularly as it increased from 0° to 60°. Based on the repeatable collapsing mechanism used by Hu and Yu, a theoretical analysis was performed to evaluate the plateau stress of the proposed honeycombs subjected to in-plane compression at high velocities with an average discrepancy of 8.12 %. The incorporation of arc walls in hexagonal honeycombs demonstrates enhanced plateau stress, EA, and SEA, with improvement ratios of up to 172 %, 152 %, and 41 %, respectively, relative to the traditional design. These improvements arise from the additional arch walls which generate lens-shaped cavities, which, despite adding mass, offer superior performance compared to the traditional honeycomb under dynamic compression at high velocities.

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弧壁六边形蜂窝的面内特性

蜂窝具有较高的比强度和能量吸收能力。然而，曲面六边形蜂窝的面内动力特性研究还不够充分。本研究研究了先进的圆弧壁六边形蜂窝的面内压缩行为，其特征是额外的圆弧壁和透镜形腔。建立了有限元模型来评估蜂窝在面内压缩下的面内压缩性能。通过参数化研究考察了冲击速度、壁厚和圆弧角对蜂窝力学性能的影响。在低速、中速和高速下确定了“X”、“V”和“I”三种变形模式。随着冲击速度和壁厚的增加，平台应力和吸能能力有所提高。弧角对平台应力、能量吸收（EA）和比能量吸收（SEA）也有增强作用，特别是从0°增加到60°。基于Hu和Yu所采用的可重复崩溃机制，对所提出的蜂窝在高速平面内压缩下的平台应力进行了理论分析，平均误差为8.12%。与传统设计相比，在六边形蜂窝中加入弧形墙可以增强平台应力、EA和SEA，改善率分别高达172%、152%和41%。这些改进来自于额外的拱壁，它产生透镜状的腔体，尽管增加了质量，但与传统的蜂窝在高速动态压缩下的性能相比，它提供了更好的性能。

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.