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Influence of grain characteristics on the friction of granular shear zones
Our results show that the first-order disparities between laboratory and numerical studies of granular shear can be explained by differences in grain characteristics and loading conditions
Influence of grain characteristics on the friction of granular shear zones
Here we report on laboratory experiments designed to reproduce the conditions of numerical models and to test the role that grain characteristics play in controlling frictional behavior
Influence of grain characteristics on the friction of granular shear zones
Grain characteristics significantly influence frictional strength and stability in granular shear zones Smooth spherical particles exhibit lower friction (μ = 0 45) than angular particles (μ = 0 6)
Influence of grain characteristics on the friction of granular shear zones
We find that frictional strength and stability of a granular shear zone are sensitive to grain shape, PSD, and their evolution We suggest that a low friction translation mechanism, such as grain rolling, operates in gouge composed of smooth particles
Influence of grain characteristics on the friction of granular shear zones
Frictional sliding along grain boundaries in brittle shear zones can result in the fragmentation of individual grains, which ultimately can impact slip dynamics
Influence of grain characteristics on the friction of granular shear zones
We report on laboratory experiments designed to investigate three fundamental deformation mechanisms for frictional shear of granular fault gouge: sliding, rolling, and dilation