DTIC ADA560950: Shock Equation of State of pdf

DTIC ADA560950: Shock Equation of State of

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The shock properties of epoxy-based particulate composites have been extensively studied in the literature. Generally, these materials only have a single particulate phase; typically alumina. This paper presents equation of state experiments conducted on five epoxy-based particulate composites. The shock stress and shock velocity states were measured for five different composites: two epoxy-aluminum two-phase composites, with various amounts of aluminum, and three epoxy-aluminummetal composites, where the metal constituent was either copper, nickel, or tungsten. The impact velocities ranged from 300 to 960 m/s. Numerical simulations of the experiments of epoxy-Al are compared with mesoscale simulations of epoxy-Al2O3 composites to investigate the effect of the soft versus hard particulate; additionally, an epoxy-Al?W simulation was conducted to investigate the material properties of the second phase on shock response of these materials. In these epoxybased particulate composites, the slope of the shock velocity-particle velocity curve appears to depend on the epoxy binder.

It is shown that the addition of only 10 vol % of a second, denser metallic phase significantly affects the shock response in these composites

• Creator/s: Defense Technical Information Center
• Date: 5/1/2012
• Year: 2012
• Book Topics/Themes: DTIC Archive, , AIR FORCE RESEARCH LAB EGLIN AFB FL MUNITIONS DIRECTORATE, *COMPOSITE MATERIALS, EPOXY COMPOSITES, NUMERICAL ANALYSIS, PARTICULATES, REPRINTS, SHOCK, SLOPE, STRESSES, TUNGSTEN, TWO PHASE FLOW, VELOCITY

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