
Concept explainers
(a)
Find the angle of friction,
(a)

Answer to Problem 12.1P
The angle of friction,
Explanation of Solution
Given information:
The diameter (d) of specimen is 71 mm.
The height (h) of specimen is 25 mm.
Shear force
The normal stress
Calculation:
Show the expression of Mohr’s coulomb failure as follows:
Here,
Find the shear strength
Here, S is the shear force and
Substitute 276 N for shear force and 71 mm for d.
Find the angle of friction
Substitute
The value of
Thus, the angle of friction,
(b)
Find the shear force (S) required to cause failure.
(b)

Answer to Problem 12.1P
The shear force required (S) to cause failure is
Explanation of Solution
Given information:
The normal stress
Calculation:
Refer part (a).
Substitute 0 for
Find the shear force is required to cause failure as follows:
Substitute
Thus, the shear force (S) required to cause failure is
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Chapter 12 Solutions
EBK PRINCIPLES OF GEOTECHNICAL ENGINEER
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