6. The rigid bar ABC is supported by a pin at B and two vertical steel...

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6. The rigid bar ABC is supported by a pin at B and two vertical steel rods. Initially the bar is horizontal and the rods are stress-free. Determine the stress in each rod if the temperature of the rod at A is decreased by 40°C. Neglect the weight of bar ABC. Use a = 11.7 x 10-6/°C and E = 200 GPa for steel. A= 1200 mm²- A = 300 mm² 1.2 m C 0.9 m 0.6 m B + -1.2 m 6. The rigid bar ABC is supported by a pin at B and two vertical steel rods. Initially the bar is horizontal and the rods are stress-free. Determine the stress in each rod if the temperature of the rod at A is decreased by 40°C. Neglect the weight of bar ABC. Use a = 11.7 x 10-6/°C and E = 200 GPa for steel. A= 1200 mm²- A = 300 mm² 1.2 m C 0.9 m 0.6 m B + -1.2 m