A rigid horizontal slab is attached to two identical copper rods. There is a gap, A = 0.18 mm between the middle bar, which is made of aluminium and the slab. Neglecting the mass of slab, calculate the stress in each rod when temperature of the whole assembly is increased by 85°C and choose the correct options. Use the following data: A(mm) arC) E(GPa) Each copper rod 16.8 x 10 500 120 Aluminium rod 23.1 x 10* 400 70 750 mm A Finally, copper will be under tension. Correct Option B Both copper and aluminium will be free i.e. without any stress. C Stress in copper will be 6.69 MPa (Magnitude wise) Correct Option D Stress in aluminium will be 16.7 MPa (Magnitude wise) Correct Option

Steel Design (Activate Learning with these NEW titles from Engineering!)
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Author:Segui, William T.
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Chapter1: Introduction
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Problem 1.5.6P: The data in Table 1.5.3 were obtained from a tensile test of a metal specimen with a rectangular...
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A rigid horizontal slab is attached to two identical copper rods. There is a gap, A = 0.18 mm between the middle bar, which is made of aluminium and the slab. Neglecting the
mass of slab, calculate the stress in each rod when temperature of the whole assembly is increased by 85°C and choose the correct options. Use the following data:
A(mm)
arC)
E(GPa)
Each copper rod
500
16.8 x 10
120
Aluminium rod
400
23.1 x 10
70
750 mm
A Finally, copper will be under tension.
Correct Option
B
Both copper and aluminium will be free i.e. without any stress.
Stress in copper will be 6.69 MPa (Magnitude wise)
Correct Option
Stress in aluminium will be 16.7 MPa (Magnitude wise)
Correct Option
Coppe
Aluminium
Coppe
Transcribed Image Text:A rigid horizontal slab is attached to two identical copper rods. There is a gap, A = 0.18 mm between the middle bar, which is made of aluminium and the slab. Neglecting the mass of slab, calculate the stress in each rod when temperature of the whole assembly is increased by 85°C and choose the correct options. Use the following data: A(mm) arC) E(GPa) Each copper rod 500 16.8 x 10 120 Aluminium rod 400 23.1 x 10 70 750 mm A Finally, copper will be under tension. Correct Option B Both copper and aluminium will be free i.e. without any stress. Stress in copper will be 6.69 MPa (Magnitude wise) Correct Option Stress in aluminium will be 16.7 MPa (Magnitude wise) Correct Option Coppe Aluminium Coppe
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