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  • Question: P5.57 Rigid bar BCD is supported by a single steel [sigma Y = 430 MPa; E = 200 GPa; a = 11.7 X 10^-6/degree C] rod and two identical aluminum [sigma Y = 275 MPa; E = 70 GPa; alpha = 23.6 X 10^-6 degree C] rods, as shown in Figure P5.57. Steel rod (1) has a diameter of 18 mm and a length of a = 3.0 m. Each aluminum rod (2) has a diameter of d2 = 25 mm and a

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    Draw the free body diagram of the bar BCD as in Figure (2). Here, force in steel rod is and the force in aluminum rod is . Write the equilibrium f…
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P5.57 Rigid bar BCD is supported by a single steel [sigma Y = 430 MPa; E = 200 GPa; a = 11.7 X 10^-6/degree C] rod and two identical aluminum [sigma Y = 275 MPa; E = 70 GPa; alpha = 23.6 X 10^-6 degree C] rods, as shown in Figure P5.57. Steel rod (1) has a diameter of 18 mm and a length of a = 3.0 m. Each aluminum rod (2) has a diameter of d2 = 25 mm and a length of b = 1.5 m. If a factor of safety of 2.5 is specified for the normal stress in each rod, determine the maximum temperature decrease that is allowable for this as assembly.