2. A brass bar tapers from a diameter of 180 mm at one end to one of 90 mm at the other over a length of 900 mm. The bar is stress-free at a temperature of 27 C. If the temperature drops to C, find...

2. A brass bar tapers from a diameter of 180 mm at one end to one of 90 mm at the other over a length of 900 mm. The bar is stress-free at a temperature of 27 C. If the temperature drops to C, find the maximum normal stress on the bar if the ends are attached to rigid supports. E= 100 GPa and a = 18 x 10" C.

コー 90.00mm

180.00mm

900.00mm