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Design and Manufacturing Guidelines for Additive Manufacturing of High Porosity Cellular structures

机译：高孔隙度蜂窝结构增材制造的设计和制造指南

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摘要

Additive Manufacturing (AM) is a layer by layer manufacturing approach for building parts. Additive manufacturing as a technology provides immense design freedom, especially in the field of medical implant design. Revolutionary technologies such as Direct Metal Laser Sintering (DMLS) and Electron Beam Melting (EBM) have the potential to customize metal implants to an individual patient. To take advantage of this technology it is important to develop rules that can transform concepts to real world designs. There are many applications that can potentially use additively manufactured cellular structures, but there is a need to provide design guidelines for manufacturability of such structures. This thesis explores the opportunities and challenges in manufacturing high porosity cellular structures, and provides a measure of manufacturability of different cellular structures and design guidelines to improve manufacturability. Cellular structures are defined as structures made from repeating a certain unit cell to form a block, and the characteristic length of each cell is in the range of 0.1 mm to 10 mm. The additive manufacturing technique considered in this work is laser powder bed fusion process (DMLS). This research studies and tests the effect of unit cell type, unit cell size, volume fraction, and orientation on the manufacturability of the cellular structures using experimental builds. Based on these parameters the manufacturability of each cellular structure is evaluated and design guidelines are provided to design and manufacture high porosity cellular structures.
机译：增材制造（AM）是一种用于建筑零件的逐层制造方法。增材制造作为一项技术提供了极大的设计自由度，尤其是在医疗植入物设计领域。直接金属激光烧结（DMLS）和电子束熔化（EBM）等革命性技术具有为个别患者定制金属植入物的潜力。为了利用这项技术，重要的是要制定可以将概念转化为现实世界设计的规则。有许多应用程序可能潜在地使用增材制造的蜂窝结构，但需要提供此类结构的可制造性的设计准则。本论文探讨了制造高孔隙度多孔结构的机遇与挑战，并提供了一种测量不同多孔结构的可制造性的方法以及提高可制造性的设计指南。蜂窝结构定义为通过重复某个单位单元以形成块而制成的结构，并且每个单元的特征长度在0.1mm至10mm的范围内。在这项工作中考虑的增材制造技术是激光粉末床熔合工艺（DMLS）。这项研究使用实验装置研究并测试了晶胞类型，晶胞大小，体积分数和取向对细胞结构可制造性的影响。基于这些参数，可以评估每个孔结构的可制造性，并提供设计指南来设计和制造高孔隙率孔结构。

著录项

  • 作者

    Kabbur, Nikhil.;

  • 作者单位

    University of Cincinnati.;

  • 授予单位 University of Cincinnati.;
  • 学科 Mechanics.
  • 学位 M.S.
  • 年度 2017
  • 页码 93 p.
  • 总页数 93
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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