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Figure 1

From: Interface frictional anisotropy of dilative sand

Figure 1

The particle size characterization of French standard sand (FSS): (a) SEM images of three particle size ranges of FSS; (b) Grain size distribution curve (GSD) of FSS; (c) Grain size distribution curve (GSD) of selected particle size range II. Based on the SEM image II, the shape of selected particles can be classified as angular, and the grain size distribution curve shows a uniform particle size range with Cu close to 1.44 (refer to Table 2).

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