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Experimental and numerical investigation on the buckling of 3D printed sandwich structure with lattice core
Journal of Sandwich Structures & Materials ( IF 3.9 ) Pub Date : 2022-06-21 , DOI: 10.1177/10996362221108974
Yiqun Cao, Xiaoliang Geng, Hui Han, Yahui Lu, Jun Wang, Changan Zhao

In this paper, theoretical analysis, numerical simulation and mechanical test on the 3D printed lattice sandwich structures are carried out to study the buckling performance. 2 types of lattice structures, body centered cubic (BCC) and rhombic dodecahedron (DOD) are included. The lattice sandwich panels are made of ALSi10 Mg alloy materials and manufactured using the selective laser melting technique. The comparative results show that DOD lattice sandwich panel not only has higher bearing capacity, but also shows stronger toughness in the post-buckling stage than BCC type panel, even they have the same characteristic size. The buckling mode depends on the topology of the unit cell. For BCC and DOD type panels, the main buckling modes are local buckling and global buckling respectively. The reasons of different buckling modes are discussed. Moreover, the buckling evolution and failure modes of the two types of panels in the post-buckling stage are investigated.



中文翻译:

3D打印格芯夹层结构屈曲的实验和数值研究

本文对3D打印的格子夹层结构进行理论分析、数值模拟和力学试验,研究其屈曲性能。包括 2 种类型的晶格结构,体心立方 (BCC) 和菱形十二面体 (DOD)。格子夹芯板由 ALSi10 镁合金材料制成,并使用选择性激光熔化技术制造。对比结果表明,DOD格子夹芯板不仅具有更高的承载能力,而且在后屈曲阶段表现出比BCC型板更强的韧性,即使它们具有相同的特征尺寸。屈曲模式取决于晶胞的拓扑结构。对于 BCC 和 DOD 型面板,主要的屈曲方式分别是局部屈曲和全局屈曲。讨论了不同屈曲模式的原因。

更新日期:2022-06-23
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