As shown in Figure MEC - 225, there is a gap between the aluminum bar and the rigid slab that is supported by 2 copper bars. At 10°C, D = 0.18 mm. For each copper bar, A = 50 mm², E = 120 GPa, and a = 16.8 x 10-6/°C. For the aluminum bar, A = 400 mm², E = 70 GPa, and a = 23.1 x 10-6/°C. Compute the stress in the copper rod when the temperature is increased to 95°C.

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As shown in Figure MEC - 225, there is a gap between the aluminum bar and the rigid slab
that is supported by 2 copper bars. At 10°C, D = 0.18 mm. For each copper bar, A = 50 mm², E =
120 GPa, and a = 16.8 x 10-6/°C. For the aluminum bar, A = 400 mm², E = 70 GPa, and a = 23.1 x
10-6/°C. Compute the stress in the copper rod when the temperature is increased to 95°C.
F
copper
aluminum
copper 750 mm
Select one:
O a 12.14 MPa
O b. 15.38 MPa
O c. 14.67 MPa
O d. 13.48 MPa
Figure MEC - 225
17 #
Transcribed Image Text:As shown in Figure MEC - 225, there is a gap between the aluminum bar and the rigid slab that is supported by 2 copper bars. At 10°C, D = 0.18 mm. For each copper bar, A = 50 mm², E = 120 GPa, and a = 16.8 x 10-6/°C. For the aluminum bar, A = 400 mm², E = 70 GPa, and a = 23.1 x 10-6/°C. Compute the stress in the copper rod when the temperature is increased to 95°C. F copper aluminum copper 750 mm Select one: O a 12.14 MPa O b. 15.38 MPa O c. 14.67 MPa O d. 13.48 MPa Figure MEC - 225 17 #
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