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An In-Depth Analysis of Competing 3-D Printed Methods for the Mobile Manufacturing of Body Armor at the Point of Need

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Technical Report,01 Oct 2017,31 Mar 2019

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US Army Combat Capabilities Development Command Army Research Laboratory Aberdeen Proving Ground United States

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The goal of this work is to present results of mechanical characterization and ballistic investigation of 3-D printed alumina Al2O3-based armor plates. The 8-mm-thick plates were manufactured using two additive manufacturing-based methods pressurized spray deposition and direct ink write DIW. The DIW Al2O3 plates exhibited superior hardness, flexural strength, and density compared to the tape cast plates. Plates 90 mm x 90 mm x 8 mm of this composition were manufactured for ballistic analysis in accordance with established ballistic characterization procedures, using a 50.8-mm-thick aluminum 6061 plate as backing and witness plates in the case of penetration or deformation. Six Al2O3 plates were examined ballistically one shot per plate against the 12.7-mm APM2 projectile 45.9 g at an impact velocity of 840 ms. The plates that were manufactured using the DIW method provided a higher impact resistance than the tape cast method.

Subject Categories:

  • Manufacturing and Industrial Engineering and Control of Production Systems
  • Armor

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