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- W4225723280 abstract "We experimentally examined the history dependence of the rotation-induced granular deformation. As an initial state, we prepared a quasi-two-dimensional granular pile whose apex is at the rotational axis and its initial inclination obeys the angle of repose. The rotation rate was increased from $0$ to $620$~(rpm) and then decreased back to $0$. During the rotation, deformation of the rotated granular pile was captured by a camera. From the acquired image data, granular friction coefficient $mu$ was measured as a function of the ratio between centrifugal force and gravity, $Gamma$. To systematically evaluate the variation of $mu$ both in the increasing (spinning up) and decreasing (spinning down) rotation-rate regimes, surface profiles of the deformed granular piles were fitted to the model considering force balance between gravity, friction, and centrifugal force. We found that $mu$ value grows in the increasing $Gamma$ regime. However, when $Gamma$ was reduced, $mu$ cannot recover its initial value. A part of the history-dependent behaviors of the rotated granular pile can be understood by the force balance model." @default.
- W4225723280 created "2022-05-05" @default.
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- W4225723280 date "2021-12-05" @default.
- W4225723280 modified "2023-09-29" @default.
- W4225723280 title "History-dependent deformation of a rotated granular pile governed by granular friction" @default.
- W4225723280 hasPublicationYear "2021" @default.
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