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Two uniform bars of length L 1 and L 2 with the coefficient of linear expansion α 1 and α 2 are joined to form a longer rod of length L 1 + L 2 . The effective coefficient of linear expansion of the composite bar is

Two uniform bars of length L1 and L2 with the coefficient of linear expansion α1 and α2 are joined to form a longer rod of length  L1 + L2 . The effective coefficient of linear expansion of the composite bar is  

Grade:12th Pass

1 Answers

Shivam Dimri
43 Points
8 years ago

I dont get it why you people post questions twice??

delta l1 = l1 * a1 * deltatheta

similarylfor other one

combining both we get

alpha effective  = ((alpa1 * l1  + alpha 2 * l2 ))/(l1+l2)

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