Stress-strain curve
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A stress-strain curve is a graph derived from measuring load (stress) versus extension (strain) for a sample of a material. The nature of the curve varies from material to material. The curve usually seen is for a ductile metal. This features an initial elastic region, followed by a plastic region, followed by fracture. An example is below.
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Stress-strain1.png
image:stress-strain1.png
See also: modulus of elasticity, Hooke's law.de:Spannungs-Dehnungs-Diagramm nl:Spanning-rekdiagram