Instrumented Low-Speed Penetration into Granular Alumina
Dynamic mechanical response of pulverized ceramics is one of the key parameters in determining the penetration resistance of ceramic targets upon impact. In this research, the resistance of compacted alumina (Al2O3) powder to low-speed long-rod penetration was experimentally determined and analytically modeled. The results recorded by the instrumented penetrator show that, at a low packing density and with low striking velocities, the ceramic powder flows extensively in a local region around the tip of the projectile. The depth-of-penetration data agrees well with the predictions of a cavity-expansion theory.
Raul R. ROJAS, Weinong W. CHEN
Ceramic Impact Response, Split Hopkinson Pressure Bar, Penetration, Cavity Expansion Model.