Abstract

Additive manufacturing processes allow producing complex geometries which include structures with enhanced mechanical performance and biomimetic properties. Among these structures, the interests on the use of lattice are increasing for both medical and mechanical applications. The mechanical behaviour of the structure is closely correlated to its shape and dimension. However, up to now, far too little attention has been paid to this aspect. Hence, this work aims to explore the effect of geometry, dimension and relative density of the cell structure on the compressive strength of specimens with lattice structures. For this purpose, various Lattice structures are designed with different geometries and dimensions. This approach leads to having structures with different relativity densities. Replicas of the designed structure are produced using Ti–6Al–4V powder processed by electron beam melting process. The samples are tested under compression. A new approach to calculate the absorbed energy up to failure by the lattice structure is presented. The results show a close relationship between the mechanical performance of the structure and the investigated parameters. In contrast with the current literature, the presented experimental data and a collection of the literature data highlight that the lattice structures with similar relative density do not exhibit the same Young’s modulus values.

Graphic Abstract

中文翻译：

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评价电子束熔化过程产生的Ti-6Al-4V晶格结构力学性能的创新方法

摘要

增材制造过程允许生产复杂的几何形状，其中包括具有增强的机械性能和仿生特性的结构。在这些结构中，对于医疗和机械应用，人们越来越关注使用晶格。结构的机械性能与其形状和尺寸密切相关。但是，到目前为止，对此方面的关注还很少。因此，这项工作旨在探讨孔格结构的几何形状，尺寸和相对密度对具有格状结构的样品抗压强度的影响。为此，设计了各种具有不同几何形状和尺寸的莱迪思结构。这种方法导致具有相对密度不同的结构。设计结构的复制品使用通过电子束熔化工艺处理的Ti-6Al-4V粉末生产。在压缩下测试样品。提出了一种新的计算晶格结构破坏能量的方法。结果表明，结构的机械性能与所研究的参数之间存在密切的关系。与当前文献相反，所提供的实验数据和文献数据的集合强调了具有相似相对密度的晶格结构不具有相同的杨氏模量值。结果表明，结构的机械性能与所研究的参数之间存在密切的关系。与当前文献相反，所提供的实验数据和文献数据的集合强调了具有相似相对密度的晶格结构不具有相同的杨氏模量值。结果表明，结构的机械性能与所研究的参数之间存在密切的关系。与当前文献相反，所提供的实验数据和文献数据的集合强调了具有相似相对密度的晶格结构不具有相同的杨氏模量值。

图形摘要