2 A) Normal and shear stresses acting on horizontal and vertical planes at the point is shown in the figure. 1) Determine the principal stresses and the maximum shear stress acting at the point. 2) If the stress element is rotated by 35° clockwise then calculate the normal stresses and shear stress. 12.6 ksi 8.6 ksi 28.8 ksi

Assuming P = 82 MPa, draw Mohr's circle and use it to determine the normal and shearingstresses after the element shown has been rotated through 25° clockwise.Answer: shear stress = -0.73 MPa.

Q1/ For the element shown in figure 1 below, determine using Mohr's circle: 1. Shearing and normal stresses on the plane whose normal are at 60° with the x-axis 2. The principle stresses and their orientation (angles) 3. The maximum shearing stresses, their associated stresses and their orientations (angles). 20 MPa 10 MPa Figure 1. 20 MPa 10 MPa