Question: If the sample of Problem 13.15 was sheared un-drained and the induced pore pressure at failure was 200 kPa, estimate the principal stress difference at

If the sample of Problem 13.15 was sheared un-drained and the induced pore pressure at failure was 200 kPa, estimate the principal stress difference at failure. What would be the angle of shearing resistance in terms of total stresses?

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