At a point on the surface of a generator shaft the 10MPa and stresses are o = -50MPa, oy = Txy=-40MPa as shown in the figure: (a) Stresses acting on an element inclined at an angle 0-45° (b) The principal stresses and (c) The maximum shear stresses 10 MPa

Q.b.

The state of stress at a point is the result of two loadings as shown in figure. When acting alone, the first loading produces the 3 MPa pure shear with respect of xy-axis. The second loading alone results in the 4 MPa pure shear with respect to the x'y-axis. The angle between the two sets of axis is 30° as shown. If the two loadings act simultaneously then resultant (absolute) shear stress at that point with respect to x-y axis is MPa (in integer). 3 MPa st 1 loading 2 loading 4 MPa α = 30° x'

At a point on the free surface of a machine component the strain rosette shown in the figure below