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Dynamic Evaluation of Acrylonitrile Butadiene Styrene Subjected to High-Strain-Rate Compressive Loads
Final rept. 1 Jun-Aug 2013
ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
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The current goal of the investigation is to understand the potential energy absorption benefits of components fabricated using fused deposition modeling additive manufacturing. Tensile test specimens were fabricated according to the ASTM D 638 standard to characterize the general mechanical behavior of the three-dimensional printed acrylonitrile butadiene styrene ABS material to assess potential strain-rate dependency. The dynamic responses were also necessary to characterize the dynamic evolution of ABS in compression at various strain rates. The ABS specimens were subjected to high-strain-rate deformation using the split-Hopkinson pressure bar. A new phenomenon, described as a multistage collapse in which the samples undergo multiple stages of compression and expansion, was observed during compression. As the velocity increased, the capability for energy absorption decreased to where there was only one stage of compression equivalent to the initial stage.
APPROVED FOR PUBLIC RELEASE