Mesoscale modeling for shock compaction of granular materials: the effect of particle morphologies and spatial pore size distribution
ORAL
Abstract
Shock compaction behavior of granular materials is critical in applications such as defense, mining, and powder metallurgy, yet limited research addresses how their intrinsic properties influence this response. This research investigated how particle morphologies and various spatial pore size distribution impact on shock compaction response in granular system. First, to explore the impact of particle morphologies, 2D mesoscale numerical simulations with hydrodynamics FLAG (Free-Lagrange) code, were conducted with three different particle sizes in ideal packing arrangements (quadrilateral packing, hexagonal packing). Results show that particle size impacts on shock compaction response depending on the types of particle arrangements, quadrilateral packing was more sensitive in particle size than hexagonal packing. Second, regarding the effect of spatial pore size distribution, three representative pore size distribution sets porosity were prepared under constant porosity and tested in 2D mesoscale modeling. Different spatial pore size distribution led to varying shock compaction velocities, having large pores delayed the shock wave propagation in granular system. These findings highlight the importance of particle-scale features in predicting shock compaction behavior of granular materials more accurately.
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Publication: Seo, D., Heatwole, E.M., Feagin, T.A., Lopez-Pulliam, I.D., Luscher, D.J., Koskelo, A., Kenamond, M., Rousculp, C., Ticknor, C., Scovel, C. and Daphalapurkar, N.P., 2024. Weak shock compaction on granular salt. Scientific Reports, 14(1), p.16695.<br>Seo, D., Luscher, D.J., Scovel, C. and Daphalapurkar, N.P., 2024. Mesoscale simulation of granular materials under weak shock compaction–pore size distribution effects. Journal of Applied Physics, 136(15).<br>Seo, D., Luscher, D.J., and Daphalapurkar, N.P., 2025. Mesoscale modeling of weak shock wave response<br>of granular materials – particle size effects (submitted).
