Mechanical characteristics of novel multistable hybrid cellular structures with adjustable macro-Poisson's ratio

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-04-22 DOI:10.1016/j.tws.2025.113356

Ran Liu , Changhai Chen , Yuansheng Cheng

{"title":"Mechanical characteristics of novel multistable hybrid cellular structures with adjustable macro-Poisson's ratio","authors":"Ran Liu , Changhai Chen , Yuansheng Cheng","doi":"10.1016/j.tws.2025.113356","DOIUrl":null,"url":null,"abstract":"<div><div>To achieve superior energy absorption capacity with multi-plateau stresses, a novel type of multistable hybrid cellular (MHC) structure was constructed through the hybridization of positive, negative, and zero Poisson's ratio cells. Three subtypes of MHC structures containing diamond-, star-, and unilaterally concave hexagon-shape cells were designed and fabricated by 3D printing. Quasi-static uniaxial compression experiments and numerical simulations were carried out to uncover the mechanical characteristics of MHC structures. Theoretical analysis was conducted to predict the equivalent Young's modulus and densification strain of MHC structure. The effects of hybridization direction, interior angle of cell, wall thickness allocation, and strut length on the properties of MHC structures were delved. The main factor controlling the specific energy absorption (<em>SEA</em>) of MHC structure was distinguished. Results show that MHC structures possess the characteristics of multi-plateau stresses and adjustable macro-Poisson's ratio. Compatible deformation between sign-opposite Poisson's ratio cells together with controllable sequential layer-by-layer crushing leads to multi-stable deformation states coupled with sign-switching Poisson's ratios of MHC structures during quasi-static uniaxial compression, which are conducive to multiple energy absorption. Compared with single Poisson’s ratio cellular structures (SPCSs), MHC structures exhibit much higher multi-plateau stresses and energy absorption capacity. When the hybridization direction is parallel to the loading direction, MHC structures are superior to SPCSs in terms of both plateau stress and <em>SEA</em>. The <em>SEA</em>s of MHC structures do not change monotonously and have optimum ranges with interior angle, wall thickness allocation, and strut length. Strut length is the main control factor for <em>SEA</em>. This work showcases good application potential of MHC structures in structural protection fields, and paves a new way for designing multistable structures with adjustable macro-Poisson's ratio.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"214 ","pages":"Article 113356"},"PeriodicalIF":5.7000,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Thin-Walled Structures","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0263823125004495","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}

引用次数: 0

Abstract

To achieve superior energy absorption capacity with multi-plateau stresses, a novel type of multistable hybrid cellular (MHC) structure was constructed through the hybridization of positive, negative, and zero Poisson's ratio cells. Three subtypes of MHC structures containing diamond-, star-, and unilaterally concave hexagon-shape cells were designed and fabricated by 3D printing. Quasi-static uniaxial compression experiments and numerical simulations were carried out to uncover the mechanical characteristics of MHC structures. Theoretical analysis was conducted to predict the equivalent Young's modulus and densification strain of MHC structure. The effects of hybridization direction, interior angle of cell, wall thickness allocation, and strut length on the properties of MHC structures were delved. The main factor controlling the specific energy absorption (SEA) of MHC structure was distinguished. Results show that MHC structures possess the characteristics of multi-plateau stresses and adjustable macro-Poisson's ratio. Compatible deformation between sign-opposite Poisson's ratio cells together with controllable sequential layer-by-layer crushing leads to multi-stable deformation states coupled with sign-switching Poisson's ratios of MHC structures during quasi-static uniaxial compression, which are conducive to multiple energy absorption. Compared with single Poisson’s ratio cellular structures (SPCSs), MHC structures exhibit much higher multi-plateau stresses and energy absorption capacity. When the hybridization direction is parallel to the loading direction, MHC structures are superior to SPCSs in terms of both plateau stress and SEA. The SEAs of MHC structures do not change monotonously and have optimum ranges with interior angle, wall thickness allocation, and strut length. Strut length is the main control factor for SEA. This work showcases good application potential of MHC structures in structural protection fields, and paves a new way for designing multistable structures with adjustable macro-Poisson's ratio.

查看原文本刊更多论文

具有可调宏观泊松比的新型多稳态杂化细胞结构的力学特性

为了在多平台应力下获得优异的能量吸收能力，通过正、负和零泊松比细胞的杂交构建了一种新型的多稳态杂交细胞（MHC）结构。采用3D打印技术设计并制备了三种MHC结构亚型，分别为菱形、星形和单侧凹六边形细胞。通过准静态单轴压缩实验和数值模拟揭示MHC结构的力学特性。通过理论分析预测了MHC结构的等效杨氏模量和致密化应变。研究了杂交方向、细胞内角、壁厚分布和支杆长度对MHC结构性质的影响。明确了控制MHC结构比能吸收（SEA）的主要因素。结果表明，MHC结构具有多平台应力和宏观泊松比可调的特点。在准静态单轴压缩过程中，MHC结构的逆符号泊松比单元之间的相容变形加上可控的顺序逐层破碎，导致MHC结构的多稳定变形状态与符号切换泊松比相耦合，有利于多重能量吸收。与单一泊松比细胞结构相比，MHC结构具有更高的多平台应力和能量吸收能力。当杂化方向与加载方向平行时，MHC结构在高原应力和SEA方面都优于spcs。MHC结构的sea不是单调变化的，随着内角、壁厚分配和支撑长度的变化，sea具有最优范围。支撑长度是SEA的主要控制因素。这项工作显示了MHC结构在结构防护领域的良好应用潜力，为设计宏观泊松比可调的多稳定结构铺平了新的道路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

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.