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strain: Quick Facts

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Facts

Also Known As internal deformation

Photos

(Top) Volume under compression, (centre) section of wire under tension, (bottom) metal tube under torsion
Graph showing typical stress-strain curves for brittle, moderately ductile, and ductile rock materials, with X marks indicating fracture points for each type. Axes display stress versus strain, and annotations highlight yield points, permanent deformation, and recoverable regions.
Figure 5: (A) Extensional strain and (B) simple shear strain, where the element drawn with dashed lines represents the reference configuration, and the element drawn with solid lines represents the deformed configuration.
Figure 6: Relations of strains to gradients of displacement (see text).
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