Comparison of Static and Dynamic Powder Compaction: Experiment and Simulation

Abstract

In this work, the static and dynamic compaction response of a sixmaterial mixture, containing both brittle and ductile constituents, is compared. Quasistatic and dynamic compaction experiments were conducted on samples and the results compared to simulations. Optical analyses of compacted samples indicate that dynamically compacting samples to near 300 m/s is not sufficient for complete compaction or localized grain melt. Simulations indicate that a wide distribution of temperature and stress states are achieved in the dynamically compacted samples; compaction speeds should be increased to near 800 m/s at which point copper grains achieve melt temperatures on their surfaces. The experimental data is used to fit a bulk Pخ± equation of state (EOS) that can be used for simulating largescale dynamic compaction for industrial applications.