受屈曲启发的亚晶格结构的设计、制造和压碎行为

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

International Journal of Smart and Nano Materials Pub Date : 2021-08-24 DOI:10.1080/19475411.2021.1966855

J. Dong, Gaoyuan Ye, Yongjun Wang, F. Jin, Hualin Fan

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引用次数: 7

摘要

摘要将屈曲模式引入直壁晶格结构中，利用聚乳酸（PLA），采用三维打印技术，设计并制备了受屈曲启发的直壁晶格元结构（BILM）。将正泊松比（PPR）的方形晶格结构通过屈曲诱导转化为负泊松比（NPR）结构。弯曲支柱降低了最大应变，阻止了支柱断裂，增加了支柱接触，并诱发了延性弯曲变形。当中心角从0°增加到120°时，元拓扑结构将破碎模式从脆性的逐层破碎、混合破碎模式转变为稳定的塑性破碎。屈曲激发的元晶格结构可以通过降低初始峰值力（IPF），同时提高能量吸收（EA）、比能量吸收（SEA）和压碎力效率（CFE），显著提高能量吸收性能。韧性破碎赋予BILM卓越的EA。

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Design, manufacture and crushing behaviors of buckling-inspired auxetic meta-lattice structures

ABSTRACT Introducing buckling pattern into straight-walled lattice structure, anovel buckling inspired lattice meta-structure (BILM) was designed and fabricated using polylactic acid (PLA) by three-dimensional (3D) printing technology. The square lattice structure with positive Poisson’s ratio (PPR) is transformed into negative Poisson’s ratio (NPR) structure by buckling induction. Curved struts decrease the maximum strain, prohibit strut fracture, increase strut contact and induce ductile bending deformation. The meta-topology changes the crushing pattern from brittle layer-by-layer fracture, hybrid crushing pattern to stable plastic crushing when increasing the central angle from 0° to 120°. Buckling inspired meta-lattice structures can obviously improve the energy absorption (EA) performance through reducing the initial peak force (IPF) while increasing the EA, specific energy absorption (SEA) and crushing force efficiency (CFE). Ductile crushing endows BILM excellent EA.

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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.