Abstract The aim of this scientific work was the analysis of the micro lattice structures under uniaxial quasi-static compression loading with regard to the effect of unit cell size and strut diameter. A wide range of cubic lattice blocks designed in a CAD software were fabricated using Ti6Al4V (Ti64) metal powder and two different production parameters in the direct metal laser sintering machine. The failure modes of the specimens were investigated and the 3D Computed Tomography system was used for the morphological analysis of the struts. An analytical model, developed by Gibson and Ashby, was adapted to the titanium body centered cubic lattices in order to predict their mechanical properties for compressive loading. Moreover, the compressive responses of the lattice structures were also studied using a numerical approach based on finite element analysis. Both experimental and theoretical results presented good agreement in terms of mechanical properties of the body centered cubic lattices and showed that such structures are great energy absorbers. Theoretical approaches gave significant results on the predictions of mechanical properties of these cellular structures, which are suitable for biomedical and transport engineering applications, in order to save manufacturing cost and time.

中文翻译：

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通过直接金属激光烧结技术产生的晶格结构的静态行为

摘要 这项科学工作的目的是分析单轴准静态压缩载荷下微晶格结构的晶胞尺寸和支柱直径的影响。在 CAD 软件中设计的各种立方晶格块是使用 Ti6Al4V (Ti64) 金属粉末和两种不同的生产参数在直接金属激光烧结机中制造的。研究了试样的破坏模式，并使用 3D 计算机断层扫描系统对支柱进行了形态分析。Gibson 和 Ashby 开发的分析模型适用于钛体心立方晶格，以预测它们在压缩载荷下的机械性能。而且，还使用基于有限元分析的数值方法研究了晶格结构的压缩响应。实验和理论结果在体心立方晶格的机械性能方面表现出良好的一致性，并表明这种结构是很好的能量吸收器。理论方法对这些细胞结构的机械性能的预测给出了显着的结果，适用于生物医学和运输工程应用，以节省制造成本和时间。