Question 1: SEMM 2123 Solid2 Sem2 2020/21 1a). Draw the Mohr Circle for critical point of, A rod under pure compressive load i) ii) A rod under pure moment (1 mark) 1b). Figure Q1 shows one 'L' shaped beam ACD which is built-in at one end. It is loaded with load F-3 kN and with load P= 2.8kN at its free end D. The beam has solid round cross-section with diameter of 100 mm. The beam is made of steel with E=210 GPa and v=0.3. By disregarding the shear stress due to shear load and using point A as the critical point to be analyzed. i) ii) iii) Calculate the respective stresses values and draw the stress element at point A in the x-y direction. Calculate and draw the principal stress element. Calculate and draw the maximum shear stress element. Z B 400 mm AZ y F = 3 KN P = 2.8 kN 500 mm x Figure Q1 (5 marks) 1c) If a strain gauge is fixed at point A at -30 degrees from the x-direction, calculate its value. (2 marks) 1d) If you were to compare point A and point B, which one is more critical? How would you decide? (2 marks)