Q3. The state of plane stress shown in Figure Q4 is expected to occur in cast-iron machine base. Knowing that for the grade of cast-iron machine used sigma.vt=160 MPa and sigma.vc = 320 MPa , determine ; a) The normal stresses in the x and y directions [1 mark] b) The shearing stress in the x-y plane [ ½ mark] c) The principal stresses [ 4 ½ marks] d) The maximum shearing stress [1 ½ marks] e) Whether rupture of the component will occur using Mohr’s Criterion [ 2 ½ marks]

Q3. The state of plane stress shown in Figure Q4 is expected to occur in cast-iron machine base. Knowing that for the grade of cast-iron machine used our = 160 MPa and oyc = 320 MPa, determine; 145 MPa 120 MPa Figure Q4 a) The normal stresses in the x and y directions |I mark] b) The shearing stress in the x-y plane 1% mark] c) The principal stresses 14% marks] d) The maximum shearing stress (1% marks) e) Whether rupture of the component will occur using Mohr's Criterion 12% marks)