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首页> 外文期刊>Proceedings of the institution of mechanical engineers >A performance metric for additively manufactured microlattice structures under different loading conditions
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A performance metric for additively manufactured microlattice structures under different loading conditions

机译：在不同负载条件下的碱性制造的微淋式结构的性能度量

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摘要

A rapidly evolving design technology in additive manufacturing is microlattice (or microarchitectured) materials. Investigating the performance of microlattices under different loading conditions is a key element for implementing this new technology into mechanical components used in different industries. In this paper, the mechanical behavior of five different microlattices under four standard modes of loading along with a combined loading scenario was investigated. The four standard modes of loading that were considered are tension, compression, simple shear, and bending. The combined loading scenario was simultaneous shear and compression. The lattice structures (i.e. octet-truss, diamond, pyramid, block lattice truss, and cubic truss) were modeled and meshed using Autodesk Inventor and Fusion 360. Constraints and the elastic loading conditions for the structures were applied to the models in Fusion 360 and static finite element simulations were performed using Autodesk Nastran software. The results of all simulations were collated and a performance function was derived from the maximum stress and stiffness results and mass of the structures. The two highest performing structures (octet-truss and cubic lattice) according to the derived metric were then combined. The octet lattice performed well under shear and the combined loading cases, while the cubic lattice performed well under tension, compression, and bending. Simulations were repeated and the performance metric was then used to show that the combination of these structures, known as the Warren truss, had improved performance as a result.
机译：添加剂制造中的快速发展设计技术是微咯苣（或微型建筑）材料。在不同的装载条件下调查微图的性能是将这种新技术实施到不同行业中使用的机械部件中的关键要素。本文研究了四种标准装载模式下五种不同微图示的机械特性以及组合的加载方案。被认为是张力，压缩，简单的剪切和弯曲的四种标准装载方式。组合的加载方案是同时剪切和压缩。使用Autodesk Inventor和Fusion 360建模并网格化晶格结构（即八位齿轮桁架，金刚石，金字塔，块格子桁架和立方桁架）。将结构的约束和弹性装载条件应用于融合360中的模型使用Autodesk Nastran软件执行静态有限元模拟。所有模拟的结果都是整理的，并且源自具有最大应力和刚度的结果和结构的质量。然后组合根据衍生度量的两个最高性能的结构（八元桁架和立方格）。八章格子在剪切和组合的装载案件下进行良好，而立方格晶格在张力，压缩和弯曲下进行良好。然后，重复模拟，然后使用性能度量来表明这些结构的组合，称为沃伦桁架，结果提高了性能。

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