condensed matter - Why the elastic limit of solid corresponds to a

In all the force-extension graphs I saw, the elastic limit corresponds to a larger extension than the limit of proportionality. Is this true for all cases? If so, what are the underlying reasons?

Elastic Limit - FasterCapital

Cholesteric phase: the pitch d corresponds to the distance, typically

Electron - Wikipedia

A nonlinear stress–strain relation (solid line) characterizes most

X-ray attenuation of bone, soft and adipose tissue in CT from 70 to 140 kV and comparison with 3D printable additive manufacturing materials

Elasticity of Solids

What is the cause of elasticity in solids? - Quora

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