Strain

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strain

STRAIN

When a system of forces or loads act on a body, it undergoes some deformation. This deformation per unit length is known as unit strain or simply a strain. It is denoted by a Greek letter epsilon (ε). Mathematically,

Strain, ε = δl / l               or            δl = ε.l

where,

δl = Change in length of the body,

and l = Original length of the body.

 

Reference

A textbook of Machine Design by R.S.Khurmi and J.K.Gupta

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