SSC JE Civil Engineering 2017 Set 1 Solved Paper

Question : 138 of 200

Marks: +1, -0

The maximum shear stress occurs on the outermost fibres of a circular shaft under torsion. In a close coiled helical spring, the maximum shear stress occurs on the ........ .

Outermost fibers
Fibers at mean diameter
Innermost fibers
None of these

Validate

Solution:

Maximum value of shear stress occurs at the centre of the spring

τ_{\max}={8wD}/{πd^3}

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