A cylindrical sample is subjected to axial compression: Vertical axial compressive stress (σa) parallel to the length of the core is 
taken to higher level. Using the Mohr Stress diagram, calculate the values of normal stress and shear stress a =1500kpa and b=500kpa and 60

The shaft is subjected to the axial force of 40 kN. Determine the average bearing stress acting on the collar C and the normal stress in the shaft. 

Q#1:    

Compute the nominal shear stress at the surface in MPa for a 40 mm diameter shaft that transmits 750 kW at 1500 rpm. Axial and bending loads assumed negligible. Torsional shearing stress is 28 N/mm2.