for shear testing on circular samples
The circular ring shear tester ETD10.180 is a laboratory test device for determining the shear strength and residual shear strength of cohesive and non-cohesive specimens.
Similar to a direct shear tester, the sample is installed in a shear box consisting of a lower and upper part but this shear box has an annular geometry. After a consolidation phase, the sample is sheared by rotating the lower shear box around the central axis.
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