Introduction
One of the most fundamental relations governing the dynamic properties of materials is Hooke’s law of
elasticity.
Hooke’s law (see Fig. 1) states that
there is a linear relationship between
stress (σ) and strain (ε). Stress is
force per unit area, i.e. pressure, and
it is measured in Newtons per square
meter (N/m2) also called Pascal (Pa).
Strain is relative deformation, i.e. deformation divided by the original dimensions, and is therefore
dimensionless.
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