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When composite rod is free, then composi...


When composite rod is free, then composite length increases to 2.002 m for temperature `20^(@)C` to `120^(@)C` when composite rod is fixed between the support there is no change in component length find y and `alpha` of steel, if `y_(c)=1.5xx10^(13)N//m^(2)alpha_(c)=1.6xx10^(-5)//.^(@)C`.

Text Solution

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`Deltal=l_(S)alpha_(S)DeltaT+l_(C)alpha_(C)DeltaTimplies0.002=[1.5alpha_(S)+0.5xx1.6xx10^(-5)]xx100`
`impliesalpha_(S)=(1.2xx10^(-5))/(1.5)=8xx10^(-6)// .^(@)C`
there is no change in compoenent length
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