Abstract Selective laser melting (SLM) technology can manufacture complex lattice structures, which effectively reduces the manufacturing constraint and significantly increases the design freedom for lattice structure. In this study, additive manufacturing and topology optimization are combined for designing Face Centre Cube (FCC), Vertex Cube (VC), and Edge Centre Cube (ECC) structures, which are manufactured via SLM technology. Mechanical performance is evaluated, and a Gibson-Ashby model is developed to predict the performance of the three structures including different levels of porosity. The results show that FCC and VC lattice structures have better mechanical behaviour compared with that of the ECC lattice structure; however, their energy absorption efficiency is inferior to that of the ECC lattice structure. Comparisons between various SLM built lattice structures made from 316L stainless steel prove that the performance of topology-optimized lattice structures is superior to the majority of lattice structures. This result verifies the feasibility of lattice structure unit selection via topology optimization technology. Various work conditions are simulated for topology optimization to obtain a lightweight lattice structure with optimal performance under specific conditions.

中文翻译：

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评估通过选择性激光熔化制造的拓扑优化晶格结构

摘要 选择性激光熔化（SLM）技术可以制造复杂的晶格结构，有效降低了制造约束，显着增加了晶格结构的设计自由度。在这项研究中，增材制造和拓扑优化相结合，用于设计通过 SLM 技术制造的面中心立方体 (FCC)、顶点立方体 (VC) 和边中心立方体 (ECC) 结构。对机械性能进行评估，并开发了 Gibson-Ashby 模型来预测包括不同孔隙率水平的三种结构的性能。结果表明，与ECC晶格结构相比，FCC和VC晶格结构具有更好的力学性能；然而，它们的能量吸收效率不如 ECC 晶格结构。由 316L 不锈钢制成的各种 SLM 构建的晶格结构之间的比较证明，拓扑优化的晶格结构的性能优于大多数晶格结构。该结果验证了通过拓扑优化技术选择晶格结构单元的可行性。模拟各种工作条件进行拓扑优化，以获得在特定条件下具有最佳性能的轻量级晶格结构。