If the deformation is small, the stress in a body is proportional to the corresponding strain.
By Hooke’s law, for small deformations,
Tensile stress/Tensile strain = Y is a constant for a given material
Y is termed as Young’s modulus.
Y = (F/A)/ (ΔL/L) = FL/(A ΔL)
(chapter: Mechanical Properties)
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