Posted by rajesh jain on .
The principal stresses at a certain point in a strained material are 150 MPa and 48 Mpa both tensile. Find normal and tangential stresses on a plane inclined at 20 degree with the major principal plane.

THEORY OF MACHINE 
drwls,
You will find the equations you need at
http://en.wikipedia.org/wiki/Mohr's_circle