Problems 39 ist four major factors that influence the internal friction angle of cohesionless soils 7-2 Define soil sensitivity and thixotropy In a direct shear test on a loose sand, a shearing stress of 36.1 kPa was recorded 7-3 while the normal stress on the failure plane was 66.4 kPa. (a) What are the shear strength parameters, c', φ'? (b) Find the major and minor principal stresses at failure. (c) Determine the shear strength at a normal stress of 110.0 kPa. -4 A consolidated drained (CD) test with a confining pressure of 100 kPa is performed e sand with a friction angle of 33°. What do you expect the on a sample of loos deviator stress at the time of failure to be? t of sand along a Problems 39 ist four major factors that influence the internal friction angle of cohesionless soils 7-2 Define soil sensitivity and thixotropy In a direct shear test on a loose sand, a shearing stress of 36.1 kPa was recorded 7-3 while the normal stress on the failure plane was 66.4 kPa. (a) What are the shear strength parameters, c', φ'? (b) Find the major and minor principal stresses at failure. (c) Determine the shear strength at a normal stress of 110.0 kPa. -4 A consolidated drained (CD) test with a confining pressure of 100 kPa is performed e sand with a friction angle of 33°. What do you expect the on a sample of loos deviator stress at the time of failure to be? t of sand along a