The mechanical response of ultralight kagomé structures consisting of hollow nickel (Ni) nanotubes and solid Ni nanorods to compression is studied using molecular dynamics simulations. In both kagomé architectures, $\frac{1}{6}\left[112\right]$ Shockley partial dislocations and twin formation are observed under compression. The structure made from solid nanorods shows deformation near both the nodes and beams of the kagomé lattice. The hollow kagomé architecture has a higher yield point than the solid kagomé structure. The deformation in the hollow nanotube structure is mostly localized in the nodal region for strains less than 11%. At higher strains, the deformation sets in all the struts and nodes of the hollow kagomé lattice. Owing to this two-stage deformation mechanism, the hollow Ni nanotube kagomé structure shows less bending and greater toughness than the solid Ni nanorod kagomé architecture.

中文翻译：

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超轻镍超材料的力学行为

使用分子动力学模拟研究了由空心镍（Ni）纳米管和固态Ni纳米棒组成的超轻kagomé结构对压缩的机械响应。在两种kagomé建筑中，$\frac{\mathrm{1个}}{6}\left[112\right]$在压缩下观察到肖克利局部位错和孪晶的形成。由固态纳米棒制成的结构在kagomé晶格的节点和梁附近均显示出变形。中空的kagomé结构比固体kagomé结构具有更高的屈服点。对于小于11％的应变，中空纳米管结构的变形大部分位于节点区域。在较高的应变下，变形会在中空kagomé晶格的所有支杆和节点中发生。由于这种两阶段的变形机制，中空的镍纳米管kagomé结构比固态的镍纳米棒kagomé结构显示出更少的弯曲和更大的韧性。