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Theory of Structures

Q1: A close coil helical spring of mean diameter D consists of n coils of diameter d. If it carries an axial load W, the energy stored in the spring, is

A

B

C

D

ANS:C -

u=(((T^2)*L)/(2*G*Ip)).

T = P * (D/2).
L = 2 * 3.14 * (D/2) * n.
Ip = (3.14*d^4)/32.
Substitute we will get answer.



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