Shear modulus and reversible particle trajectories of frictional granular materials under oscillatory shear
arXiv:2103.14457 · doi:10.1140/epje/s10189-021-00075-0
Abstract
In this study, we numerically investigated the mechanical responses and trajectories of frictional granular particles under oscillatory shear in the reversible phase where particle trajectories form closed loops below the yielding point. When the friction coefficient is small, the storage modulus exhibits softening, and the loss modulus remains finite in the quasi-static limit. As the friction coefficient increases, the softening and residual loss modulus are suppressed. The storage and loss moduli satisfy scaling laws if they are plotted as functions of the areas of the loop trajectories divided by the strain amplitude and diameter of grains, at least for their small values.
arXiv comment7 pages, 11 figures
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