Questions and answers: intact rock 77Next, for each Mohr circle, draw the radius that is perpendicular to the
tangent Mohr-Coulomb envelope line representing shear failure, where
r, and r, represent the radii of the uniaxial tension circle and the uniaxial
compression circle, respectively.
If we now draw a line from the centre of the circle representing uni-
axial tension, parallel to the shear failure criterion line, to the previously
drawn radial line in the circle representing uniaxial compression, we
obtain the diagram below.
A BInspection of this diagram reveals that, for the triangle ABC, the
following lengths and angles apply:
C
A B