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A steel wire of length LAB is stretched between rigid supports The initial prestress in the wires is Pa tension when the temperature is 25 degrees celsius Assume alpha

A steel wire of length LAB is stretched between rigid supports. The initial prestress in the wires is 45 MPa (tension) when the temperature is 25 degrees celsius. Assume alpha (a) = 15 * 10-6/degreesC and E= 200 GPa.

a) What is the stress in the wire when the temperature drops to 0 degrees celcius? Is it in tension or compression?

b) At what temperature T will the stress in the wire become zero?

c) What happens when the temperature continues to increase past T calculated in b? What is the elongation in the wire at 50 degrees celcius?

 
 
 
 

 

 

Jul 10 2020 Read more Less More

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