3. The material is subjected to biaxial loading producing uniform normal stress ox and oy as shown. The strains are e, = -0.00065 and e, = -0.00040. Use E = 30 x 10° psi and v = Determine the following: (a) oz. Indicate tension or compression. Use 2 decimal places. (b) oy. Indicate tension or compression. Use 2 decimal places. (c) Change in the thickness of the material. Indicate elongation or contraction. Use 5 decimal places and scientific notation of x 10-3 (Example: ._ 0.30. x 10-3) y Oy Ox Oy 5 N

Bar ABC has an outer diameter of 10 mm and is made of red brass for which E = 100 GPa. Section AB is hollow with a wall thickness of 2 mm and section BC is solid. Knowing that P is 24 kN, applied to both sides of the bar at B and Q is 8 kN, applied to the bar at C as shown. What is the total %3D change in length of bar ABC? Express your answer in mm, to the nearest 0.01 mm, taking elongation as positive and contraction as negative. 4 13 'A В C P 400 mm -600 mm-