Simultaneous enhancements of energy absorption and strength driven by hexagonal close-packed lattice structures of resin revealed by in-situ compression

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL Thin-Walled Structures Pub Date : 2024-01-25 DOI:10.1016/j.tws.2024.111586

Zhengchen Han , Zhichao Ma , Shuai Tong , Guoxiang Shen , Yang Sun , Jiakai Li , Hongwei Zhao , Luquan Ren

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Abstract

A burgeoning interest pervades lattice structures' lightweight yet energy-absorbent traits. Nevertheless, the solitary damage mode of conventional lattice structures impedes augmented applications. Concretely, this work centered on engineering a novel structure (a hexagonal close-packed configuration inspired by biomimicry) to transform the compressive damage mode by altering lattice arrangements. Synchronously, the effect of compression rate and relative density variations on the mechanical properties and energy absorption of the lattice structures was also probed. Additionally, modifying lattice geometries to achieve altered compression failure modes enhanced mechanical performance. Notably, strength and energy absorption increased synergistically with escalating relative density and compression rate, exceeding the capabilities of classical lattice structures fabricated from conventional structures. The present work was expected to provide researchers and engineers with new insights into the design for both mechanical properties and energy absorption.

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原位压缩揭示树脂六方紧密堆积晶格结构对能量吸收和强度的同时增强作用

人们对晶格结构的轻质吸能特性兴趣日渐浓厚。然而，传统晶格结构的单一破坏模式阻碍了其更广泛的应用。具体而言，这项工作的核心是设计一种新型结构（受仿生学启发的六边形紧密堆积结构），通过改变晶格排列来改变压缩损伤模式。与此同时，还探究了压缩率和相对密度变化对晶格结构的机械性能和能量吸收的影响。此外，通过改变晶格几何结构来实现改变的压缩破坏模式也能提高机械性能。值得注意的是，强度和能量吸收随着相对密度和压缩率的增加而协同增加，超过了由传统结构制造的经典晶格结构的能力。目前的研究工作有望为研究人员和工程师提供机械性能和能量吸收设计方面的新见解。

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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.