MOHR'S CIRCLE for Plane Stress EXAMPLES 1. Determine and show on a sketch: a. b. c. Principal stresses τmax σn and τn on plane a-a A 60 MPa 40 MPa 45° 80 MPa A 2. At a point in a stressed body, the stresses on two perpendicular planes are as shown. Determine a. b. The stresses on plane a-a. The stresses on horizontal and vertical planes at the point. a σaa τaa 45° 18° a 50 MPa 200 MPa 3. Determine the principal stresses, maximum shear stress, maximum in plane shear stress, horizontal and vertical stresses. Use MOHR'S CIRCLE. 15 MPa 40 MPa 60° 50 MPa 45° 40 MPa 4. Determine the principal stresses, maximum shear stress, maximum-in-plane shear stress, horizontal and vertical stresses. Use Mohr’s Circle. 135.36 MPa 45° 15° 15° 43.3 MPa 75 MPa 56.7 MPa