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

被引：1

作者：

Zhang, Chuanbiao ^{[1
]}

Lu, Fucong ^{[1
]}

Mo, Wenchao ^{[1
]}

Mo, Kelan ^{[1
]}

Liu, Yang ^{[1
]}

Zhu, Yilin ^{[2
,3
]}

机构：

[1] Guangxi Univ, Coll Civil Engn & Architecture, Sci Res Ctr Engn Mech, Key Lab Disaster Prevent Struct Safety,Minist Educ, Nanning 530004, Peoples R China

[2] Sichuan Univ, Key Lab Sichuan Prov, Failure Mech & Engn Disaster Prevent, Chengdu 610065, Peoples R China

[3] Southwest Petr Univ, Sch Civil Engn & Geomat, Chengdu 610500, Peoples R China

来源：

STRUCTURES | 2025年 / 75卷

基金：

中国国家自然科学基金;

关键词：

Metamaterials; Auxetics; Energy absorption; Dynamic response;

D O I：

10.1016/j.istruc.2025.108670

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

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.

引用

页数：14

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