PART II: STATIC FAILURE ANALYSIS (20 points) The shaft shown in figure is supported by the housing and made of a steel with a yield strength of 473 MPa and an ultimate strength of 642 MPa. The shaft has a circular cross-section with a diameter of 25 mm, ... 1. Locate the most critical point on the most critical section. (2 points) 2. Plot the three-dimensional stress element for that point. (2 points) 3. Calculate the values of stresses. (9 points) 4. Convert them to principal stresses. (3 points) 2000 N -250-mm dia. 5. Determine the safety factor using the maximum shear stress (MSS) theory. (4 points) Housing 50 mm