Abstract
Materials Science Naturally brittle and porous media, like ice shelves and rockfill dams, are collapse-prone when they encounter chemically active fluids, or pressure. What happens when these materials are subject to both forces at once is not well understood. Einav and Guillard analyzed a simpler version of a rockfill dam: a vertical cylinder filled with puffed rice. After applying pressure and then injecting liquid into the bottom of the cylinder, they observed “ricequakes.” These abrupt collapses of wetted puffed rice began shortly after liquid injection and were marked by continuous clicking sounds. A model based on these observations could be applied to analyze the effects of geological pressures over long time scales in crustal rocks and ice sheets. Sci. Adv. 10.1126/sciadv.aat6961 (2018).
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