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Bimetallic Strip

  • Thread starter Winzer
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  • #1
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Homework Statement


the bimetallic strip has a thickness x and is straight at temp T.
What is the radius of curvature of the strip, R, when it is heated to temp T+dT
Coeff. of linear expansion: a1, a2.
Assume each each metal has a thickness of x/2 and X<<R


Homework Equations


L1=L0(1+a1 dT)
L2=L0(1+a2 dT)

The Attempt at a Solution


I was givin the hint that:
L2=(R+x/4)theta
L1=(R-x/4)theta
Where on earth do this +-x/4 come from?!
 

Answers and Replies

  • #2
Doc Al
Mentor
44,882
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Where on earth do this +-x/4 come from?!
If R is the radius corresponding to the center of the strip, then R ± x/4 describes the radius at the center of each metal.
 

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