UNIVERSITY OF ULSTER UNIVERSITY EXAMINATIONS January 2015 odule Code: MEC306 CRN: 79871 Title: Statics and 2 cmd 26 Q.5 A steel rod of cross-sectional area 600 mm² and a co-axial copper tube of cross sectional area 1000 mm² are firmly attached at the two ends to form a compound bar. If the temperature of the bar is raised by 50° C, determine: (a) the stress in the steel and the copper (12 marks) (b) the overall deflection of the compound bar for every 1m length of bar. (8 marks) For steel, E = 200 GN/m², a = 11 x 106 per °C For copper, E=100 GN/m², a = 16.5 x 106 per °C