The normal and shear stress acting on a plane rotated 30 degree counterclockwise from the horizontal plane are 200 psf and 50 psf respectively.The normal and shear stresses acting on a plane rotated 30 degree counterclockwise from the vertical plane are 400psf and -50psf repectively.
a.Graph mohrs circle and find the origin of planes(i.e pole)
b.Sketch neatly on the graph the principal eement;show a properly oriented element whose faces represent principal places and indicate the magnitude and direction of the principal stress.
c.Repeat (b)on the same mohr circle drawing for the planes of maximum shear.
d.Draw a square soil element with the state of stress on the vertical and horizontal planes.