Mesoscale simulation on the shock compression behaviour of Al-W-Binder granular metal mixtures

摘要

The mesoscale characteristics of granular metal mixtures have considerable influence on their shock compression properties. However, it is difficult to use traditional research methods, such as theoretical analysis and experiments, to investigate granular metal mixtures in mesoscale. In this study, a mesoscale simulation method, which follows the real morphology distribution, is introduced to investigate the shock compression behaviour of granular metal mixtures based on the mesoscale characteristics. Numerical studies on the compressive processes of typical granular metal mixtures were conducted in mesoscale. The relationship between particle velocity (U_p) and shock velocity (U_s), which is the bridge between mesoscale and macroscale, is established and validated against the experimental results. The influence of mesoscale characteristics of an Al-W-Binder granule metal mixture on the shock compression behaviour has been analyzed based on the simulation results. It has been shown that the simulation results correlate reasonably well with the corresponding experimental results. The numerical studies presented can be used to predict dynamic response of granular metal mixtures with different mesoscale characteristics over a wide range of pressure.