A triaxial sample of loose sand is tested in lateral extension (LE) (see Fig 13 7) The sample is first consolidated non hydrostatically, with 1 15 kPa and 3 10 kPa The sample is then failed in LE, and the angle of internal friction is 30, c 0 (a) Draw the Mohr circles for both initial and at failur...

For lateral extension h 3 decreases and ...

A triaxial sample of loose sand is tested in lateral extension (LE) (see Fig. 13.7). The sample

Question:

A triaxial sample of loose sand is tested in lateral extension (LE) (see Fig. 13.7). The sample is first consolidated non-hydrostatically, with σ1 = 15 kPa and σ3 = 10 kPa. The sample is then failed in LE, and the angle of internal friction is 30°, c = 0.
(a) Draw the Mohr circles for both initial and "at failure" conditions.
(b) What will be the major and minor principal stresses at failure?