Question: Q1 (25marks) A pin connected structure is loaded and supported as shown in the Figure below. Member AB is rigid; C is a steel

Q1 (25marks) A pin connected structure is loaded and supported as shown

Q1 (25marks) A pin connected structure is loaded and supported as shown in the Figure below. Member AB is rigid; C is a steel rod (E=200Gpa, A=600 mm, and a= 11.9(10-6/C); and D is aluminium post (E=73 Gpa, A=2500 mm, and = 22.5(10-6/C). Initially, bar AB is horizontal and rod C is vertical, and there is a 0.09-mm gap between the horizontal arm and post D. If a 35-kN force P is applied to the right end of the bar AB and the temperature of the system is raised by 4T= 40C, determine 1. The normal stresses in the steel rod C and aluminium post D. 2. The changes in length of the steel rod C and of the aluminium post D. 50 mm 0.09 mm B unloaded 100 mm -200 mm- E A Rigid D 150 mm C 300 mm

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