A close-coiled helical spring with mean coil diameter D and n coils of wire diameter d is subjected to an axial force W. What is the expression for the energy stored in the spring?

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Subject: Theory of Structurescivil-engineering-mcqs › theory-of-structures
Published: 17 Jan 2019
Last updated: 28 May 2026

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4W D² n divided by d⁴ N4W squared D n divided by d⁴ N4W squared D cubed n divided by d⁴ N4W squared D cubed n squared divided by d⁴ N

Explanation

The energy stored in a close-coiled helical spring under axial load W depends on the square of the load, the cube of the mean coil diameter D, the number of coils n, and inversely on the fourth power of the wire diameter d and the modulus of rigidity N. Therefore, the correct formula is 4W²D³n/d⁴N.

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A close-coiled helical spring with mean coil diameter D and n coils of wire diameter d is subjected to an axial force W. What is the expression for the energy stored in the spring?

Explanation

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