Dynamic responses and energy absorption characteristics of windmill-shaped auxetic structure under impact loading

IF 3.9 2区工程技术 Q1 ENGINEERING, CIVIL

Structures Pub Date : 2025-03-18 DOI:10.1016/j.istruc.2025.108670

Chuanbiao Zhang , Fucong Lu , Wenchao Mo , Kelan Mo , Yang Liu , Yilin Zhu

{"title":"Dynamic responses and energy absorption characteristics of windmill-shaped auxetic structure under impact loading","authors":"Chuanbiao Zhang , Fucong Lu , Wenchao Mo , Kelan Mo , Yang Liu , Yilin Zhu","doi":"10.1016/j.istruc.2025.108670","DOIUrl":null,"url":null,"abstract":"<div><div>In engineering applications, lightweight and high-strength materials are highly sought after. The conventional missing rib structure is a type of auxetic metamaterial known for its lightweight and superior auxetic performance, but it experiences drawbacks such as inconsistent deformation and suboptimal energy absorption. In this paper, we present an enhanced auxetic structure inspired from the windmill. The deformation mechanism of the structure is investigated using finite element analysis. Theoretical derivations are provided for the plateau stress of the structure under impact, with finite element simulations used to confirm these results. Additionally, the impact of various geometric parameters on the energy absorption characteristics of the structure is examined. Findings show that the energy absorption of the proposed design is increased by more than 70 % compared with the traditional structure, and the specific energy absorption is increased by more than 20 %. This research offers theoretical foundations and design insights for future applications of the windmill-shaped auxetic structure.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"75 ","pages":"Article 108670"},"PeriodicalIF":3.9000,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Structures","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2352012425004849","RegionNum":2,"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

In engineering applications, lightweight and high-strength materials are highly sought after. The conventional missing rib structure is a type of auxetic metamaterial known for its lightweight and superior auxetic performance, but it experiences drawbacks such as inconsistent deformation and suboptimal energy absorption. In this paper, we present an enhanced auxetic structure inspired from the windmill. The deformation mechanism of the structure is investigated using finite element analysis. Theoretical derivations are provided for the plateau stress of the structure under impact, with finite element simulations used to confirm these results. Additionally, the impact of various geometric parameters on the energy absorption characteristics of the structure is examined. Findings show that the energy absorption of the proposed design is increased by more than 70 % compared with the traditional structure, and the specific energy absorption is increased by more than 20 %. This research offers theoretical foundations and design insights for future applications of the windmill-shaped auxetic structure.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Structures Engineering-Architecture

CiteScore

5.70

自引率

17.10%

发文量

1187

期刊介绍： Structures aims to publish internationally-leading research across the full breadth of structural engineering. Papers for Structures are particularly welcome in which high-quality research will benefit from wide readership of academics and practitioners such that not only high citation rates but also tangible industrial-related pathways to impact are achieved.