Name:_______________ 2-27-2015 ME2570. Mechanics of Materials – TEST No. 2 1. Three bars each made of different materials are connected together and placed between two walls when the temperature is T1 = 12oC. Determine the force exerted on the rigid supports when the temperature becomes T2 = 18oC. (30 pts.) ME2570 Mechanics of Materials. 2nd Test 2–27–2015 2. The shaft is made of A–36 steel (G = 75 GPa) and has a diameter of 80 mm. If the shaft is fixed at A and B determine the reactions at A and B when the torques are applied to B and C as shown. (35 pts) ME2570 Mechanics of Materials. 2nd Test 2 2–27–2015 3. The two pipes are made of the same material and connected as shown. If the cross–section area of BC is A and that of CD is 2A. Determine the reactions at B and D when a force P is applied at the junction C. ME2570 Mechanics of Materials. 2nd Test 3 2–27–2015 = = = = ; = Δ Additional relations: ΣF = 0ΣM = 0 For a solid shaft: For a hollow shaft: J= 2 J = ( − ! ) 2 ME2570 Mechanics of Materials. 2nd Test 4