Experimental and computational investigations of novel 3D printed square tubular lattice metamaterials with negative Poisson's ratio
Experimental and computational investigations of novel 3D printed square tubular lattice metamaterials with negative Poisson's ratio
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DOI：
10.1016/j.addma.2022.102789
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发表时间：
2022-04-01
影响因子：
11
通讯作者：
Xie, Yi Min
中科院分区：
文献类型：
--
作者：
Han, Dong;Ren, Xin;Xie, Yi Min
设计、制造和研究了新型3D打印方形拉胀管状晶格（SATL）结构。通过有限元法和实验研究了它们的力学性能。高度和壁厚对SATL结构的力学性能有不同的影响。与圆形拉胀管（CATL）结构相比，SATL结构在轴向载荷下具有较低的峰值力。在水平荷载作用下，SATL结构具有较高的刚度和比吸能。此外，在侧向荷载作用下，该结构的拉胀效应也很明显。然后，对几种改进的SATL结构进行了数值研究，结果表明，改进的ISATL结构在轴向和横向载荷作用下具有更强的能量吸收能力。由于其独特的结构设计和优异的力学性能，SATL结构和ISATL结构在土木工程、车辆耐撞性和防护基础设施中具有巨大的应用潜力。
Novel 3D printed square auxetic tubular lattice (SATL) structures were designed, fabricated and investigated. Their mechanical properties were examined by the finite element method and experiments. The height and wall thickness show different effects on the mechanical properties of SATL structures. Compared with the circular auxetic tubular (CATL) structures, the SATL structure has a lower peak force under axial load. Under lateral load, the SATL structure has higher stiffness and specific energy absorption. Moreover, the auxetic effect of the proposed SATL structure is also obvious under lateral load. Then, numerical investigations of several improved SATL structures were carried out, the results show that the improved square auxetic tubular lattice (ISATL) structures have stronger energy absorption capacity under axial and lateral loads. Due to their unique structural design and excellent mechanical properties, the SATL structures and ISATL structures have great potential for applications in civil engineering, vehicle crashworthiness and protective infrastructure.