An In-Depth Analysis of Competing 3-D Printed Methods for the Mobile Manufacturing of Body Armor at the Point of Need
Technical Report,01 Oct 2017,31 Mar 2019
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.
- Manufacturing and Industrial Engineering and Control of Production Systems