A number of strategies that enable lattice structures to be derived from Topology Optimisation (TO) results suitable for Additive Manufacturing (AM) are presented. The proposed strategies are evaluated for mechanical performance and assessed for AM specific design related manufacturing considerations. From a manufacturing stand-point, support structure requirement decreases with increased extent of latticing, whereas the design-to-manufacture discrepancies and the processing efforts, both in terms of memory requirements and time, increase.\ud\udResults from Finite Element (FE) analysis for the two loading scenarios considered: intended loading, and variability in loading, provide insight into the solution optimality and robustness of the design strategies. Lattice strategies that capitalised on TO results were found to be considerably (∼40-50%) superior in terms of specific stiffness when compared to the structures where this was not the case. The Graded strategy was found to be the most desirable from both the design and manufacturing perspective. The presented pros-and-cons for the various proposed design strategies aim to provide insight into their suitability in meeting the challenges faced by the AM design community.
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机译:提出了许多策略,这些策略使晶格结构能够从适用于增材制造(AM)的拓扑优化(TO)结果中得出。对提出的策略进行机械性能评估,并针对AM特定设计相关的制造考虑因素进行评估。从制造的角度来看,支撑结构的要求随着网格化程度的增加而降低,而从设计到制造的差异以及在内存要求和时间方面的处理工作都在增加。\ ud \ ud有限元素(FE)的结果)针对所考虑的两种加载方案的分析:预期的加载和加载中的可变性,可帮助您深入了解设计策略的解决方案最优性和稳健性。与不是这种情况的结构相比,发现利用TO结果的晶格策略在比刚度方面要好得多(〜40-50%)。从设计和制造的角度来看,分级策略是最理想的。提出的各种拟议设计策略的利弊旨在深入了解其在适应AM设计社区所面临挑战方面的适用性。
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