Stresses at a point are: 60 MPa in the x-direction, 80 MPa inthe y-direction and no shear stress in this reference x-y plane.Note that these are already the principal stresses and thereference plane x-y is the principal plane. What are the stressesat 45o clockwise from the principal planes? Show them ona properly-oriented element. Mohr’c cirle is to be used and noequations will be accepted.
