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

被引：23

作者：

Dong, Jianhua ^{[1
]}

Ye, Gaoyuan ^{[2
]}

Wang, Yongjun ^{[3
]}

Jin, Fengnian ^{[1
]}

Fan, Hualin ^{[3
]}

机构：

[1] Army Engn Univ PLA, State Key Lab Disaster Prevent & Mitigat Explos &, Nanjing, Peoples R China

[2] Northeast Forestry Univ, Coll Mat Sci & Engn, Engn Res Ctr Adv Wooden Mat, Minist Educ, Harbin, Peoples R China

[3] Nanjing Univ Aeronaut & Astronaut, State Key Lab Mech & Control Mech Struct, Nanjing, Peoples R China

来源：

INTERNATIONAL JOURNAL OF SMART AND NANO MATERIALS | 2021年 / 12卷 / 04期

关键词：

Auxetic meta-lattice; crushing behavior; analytical modeling; NEGATIVE POISSON RATIO; MECHANICAL-PROPERTIES; ELASTIC PROPERTIES; HONEYCOMBS; CONSTANTS; SYSTEM; PANELS; MODEL;

D O I：

10.1080/19475411.2021.1966855

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 degrees to 120 degrees. 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.

引用

页码：491 / 510

页数：20

共 40 条

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