Notch Flexure as Kirigami Cut for Tunable Mechanical Stretchability towards Metamaterial Application

IF 4.5 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Smart and Nano Materials Pub Date : 2022-04-03 DOI:10.1080/19475411.2022.2059589

Yanqi Yin, Yang Yu, Bo Li, Guimin Chen

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引用次数: 4

Abstract

ABSTRACT Kirigami is an art of paper cutting, which can be used in mechanical metamaterials, actuators, and energy absorption based on its deployable and load-deflection characteristics. Traditional cuts with zero width produce undesirable plastic deformation or even tear fracture due to stress concentration in stretching. This study proposes to enlarge the cut width into a notch flexure, which is applied to an orthogonality-cutted kirigami sheet, which buckles out of plane into a 3D configuration patterns under uniaxial tension. The use of compliant beam as the notch makes the stress distribution around the cuts more uniform in both elastic and elastoplastic regime. The experimental and numerical results show that by tuning the geometric parameters of cuts and material properties of the sheets, the trigger condition of 3D patterns can be adjusted. Potential capability of tunable phononic wave propagation in this kirigami-inspired metamaterial is demonstrated. This design methodology offers a theoretical guide for kirigami-based structures. Graphical Abstract

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缺口弯曲作为基利伽米切割可调机械拉伸性能在超材料中的应用

基里伽米是一门剪纸艺术，基于其可展开和负载偏转的特性，可用于机械超材料、致动器和能量吸收。传统的零宽度切割在拉伸过程中由于应力集中而产生不良的塑性变形甚至撕裂断裂。本研究提出将切口宽度扩大为切口弯曲，并应用于正交切割的基里ami片材，在单轴拉伸下，基里ami片材从平面屈曲成三维构型图案。采用柔性梁作为切口，使切口周围的应力分布在弹性和弹塑性状态下都更加均匀。实验和数值结果表明，通过调整切割的几何参数和板材的材料特性，可以调整三维图案的触发条件。证明了这种基里伽米启发的超材料具有可调谐声子波传播的潜在能力。这种设计方法为基于kirigami的结构提供了理论指导。图形抽象

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来源期刊

International Journal of Smart and Nano Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

6.30

自引率

5.10%

发文量

审稿时长

11 weeks

期刊介绍： The central aim of International Journal of Smart and Nano Materials is to publish original results, critical reviews, technical discussion, and book reviews related to this compelling research field: smart and nano materials, and their applications. The papers published in this journal will provide cutting edge information and instructive research guidance, encouraging more scientists to make their contribution to this dynamic research field.