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首页> 外文期刊>Proceedings of the institution of mechanical engineers >Finite element analysis and experimental study of plastic lattice structures manufactured by selective laser sintering
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Finite element analysis and experimental study of plastic lattice structures manufactured by selective laser sintering

机译：选择性激光烧结制备塑料晶格结构的有限元分析与实验研究

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摘要

The availability of additive manufacturing technologies in particular the selective laser sintering process has enabled the fabrication of high strength, lightweight and complex cellular lattice structures. In this study, the effective mechanical properties of selective laser sintering produced periodic lattice structures were investigated. Three different types of lattice structures were designed by repeating three types of open-form unit cells consisting of triangular prism, square prism and hexagonal prism. A novel approach of creating the complex and conformable lattice structures using traditional modelling software such as Creo (R) proposed by the authors was used. Based on the predesigned lattice structures, finite element analysis was carried out to evaluate the mechanical properties of these structures. For the experimental study, nylon samples were printed using a plastic selective laser sintering system and tested using a universal testing machine. Finite element analysis results show that lattice structures with triangular prism perform better than the other two prisms in terms of Young's modulus to relative density ratio. Tensile tests results show good conformance with the results obtained from finite element analysis.
机译：增材制造技术（特别是选择性激光烧结工艺）的可用性使得能够制造高强度，重量轻和复杂的蜂窝晶格结构。在这项研究中，研究了选择性激光烧结产生的周期性晶格结构的有效机械性能。通过重复三种由三角形棱镜，正方形棱镜和六边形棱镜组成的开放式晶胞，设计出三种不同类型的晶格结构。使用了一种新颖的方法，该方法使用作者提出的传统建模软件（例如Creo（R））创建复杂且一致的晶格结构。基于预先设计的晶格结构，进行了有限元分析以评估这些结构的力学性能。对于实验研究，使用塑料选择性激光烧结系统打印尼龙样品，并使用通用测试机进行测试。有限元分析结果表明，在杨氏模量/相对密度比方面，具有三棱柱的晶格结构比其他两个棱柱的性能更好。拉伸试验结果与有限元分析结果吻合良好。

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