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Young's Modulus (sometimes referred to
as Modulus of Elasticity, meaning "measure" of elasticity) is an extremely
important characteristic of a material.
It is the numerical evaluation of
Hooke's Law, namely the ratio of stress to strain (the measure of resistance to
elastic deformation). To calculate Young's Modulus, stress (at any point) below
the proportional limit is divided by corresponding strain. It can also be
calculated as the slope of the straight-line portion of the stress-strain curve.
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