A voxel-based method of constructing and skinning conformal and functionally graded lattice structures suitable for additive manufacturing

IF 10.3 1区工程技术 Q1 ENGINEERING, MANUFACTURING

Additive manufacturing Pub Date : 2017-01-01 DOI:10.1016/j.addma.2016.10.006

A.O. Aremu, J.P.J. Brennan-Craddock, A. Panesar, I.A. Ashcroft, R.J.M. Hague, R.D. Wildman, C. Tuck

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引用次数: 150

Abstract

Additive Manufacturing (AM) enables the production of geometrically complex parts that are difficult to manufacture by other means. However, conventional CAD systems are limited in the representation of such parts. This issue is exacerbated when lattice structures are combined or embedded within a complex geometry. This paper presents a computationally efficient, voxel-based method of generating lattices comprised of practically any cell type that can conform to an arbitrary external geometry. The method of conforming involves the tessellation and trimming of unit cells that can leave ‘hanging’ struts at the surface, which is a possible point of weakness in the structure. A method of joining these struts to form an external two dimensional lattice, termed a ‘net-skin’ is also described. Traditional methods of manufacturing lattice structures generally do not allow variation of cell properties within a structure; however, additive manufacturing enables graded lattices to be generated that are potentially more optimal. A method of functionally grading lattices is, therefore, also described to take advantage of this manufacturing capability.

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一种适合于增材制造的共形和功能梯度晶格结构的基于体素的构造和蒙皮方法

增材制造(AM)能够生产出其他方法难以制造的几何复杂零件。然而，传统的CAD系统在这些部件的表示上是有限的。当晶格结构被组合或嵌入到复杂的几何结构中时，这个问题会更加严重。本文提出了一种计算效率高，基于体素的方法来生成由几乎任何细胞类型组成的晶格，这些细胞类型可以符合任意外部几何形状。一致性的方法包括单元格的镶嵌和修剪，这些单元格可能在表面留下“悬挂”支柱，这是结构中可能存在的弱点。还描述了一种将这些支柱连接起来形成外部二维晶格的方法，称为“网皮”。制造晶格结构的传统方法通常不允许在结构内改变细胞特性;然而，增材制造可以生成可能更优的梯度晶格。因此，还描述了一种功能分级晶格的方法，以利用这种制造能力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Additive manufacturing Materials Science-General Materials Science

CiteScore

19.80

自引率

12.70%

发文量

648

审稿时长

35 days

期刊介绍： Additive Manufacturing stands as a peer-reviewed journal dedicated to delivering high-quality research papers and reviews in the field of additive manufacturing, serving both academia and industry leaders. The journal's objective is to recognize the innovative essence of additive manufacturing and its diverse applications, providing a comprehensive overview of current developments and future prospects. The transformative potential of additive manufacturing technologies in product design and manufacturing is poised to disrupt traditional approaches. In response to this paradigm shift, a distinctive and comprehensive publication outlet was essential. Additive Manufacturing fulfills this need, offering a platform for engineers, materials scientists, and practitioners across academia and various industries to document and share innovations in these evolving technologies.