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Determine the shear stress and the friction coefficient

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Reference no: EM13697573

Problem 1:

The stress acting on two planes at point, P, is shown in the figure below. Determine the shear stress, acting on plane AB and the principal stresses at the point.

1068_Pressure-shear test.png

Problem 2:

A pressure-shear test is conducted on a specimen of rock gouge. A normal pressure p and shear stress Τ are applied to the specimen as shown. The lateral stress components σz, - Τzx and Τzy, are negligible.

2181_Pressure-shear test1.png

The test was run with p = 20 MPa and Τ = 60 MPa. A post-mortem examination of the specimen reveals slip bands 60. degrees to the horizontal direction. Assuming that slip occurs on the bands when

|Τn| = f|σn|

find the friction coefficient f.

Reference no: EM13697573

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