1.  

A plane member in a body has a normal compressive stress of 60 MPa in the x direction, as shown in Figure, and also It is subjected to a shear stress of 40 MPa. A) Normal and normal on a plane inclined at 30 to the normal stress Determine shear stresses. b) The maximum and minimum values of normal stresses that may occur in inclined planes, and Determine the direction of these stresses. c) the magnitude of the maximum shear stress that can be found in an inclined plane, and find the direction. 40 MPa 60 MPa