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April 18, 2014

April 18, 2014

Posted by **Jamal** on Wednesday, August 24, 2011 at 2:26am.

- Physics 4B -
**drwls**, Wednesday, August 24, 2011 at 7:37amFirst, look up the coefficient of thermal expansion of steel. Call it "a". Let the change in temperature necessary to shrink the rivet to fit the hole be "delta T". It will be a negative number in this case. It depends up the type of steel you have: structural (carbon) steel or stainless steel. They should have told you which it is. A reasonable number to use is

a = 13*10^-6 (deg C)^-1

D2 = final rivet diameter

D1 = initial rivet diameter

Solve the equation

D2 - D1 = -0.002 = 1.873*a*(delta T)

delta T = -0.00107/a

and add that to the initial temperature. Since deelta T is negative, you will end up with a colder temperature

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