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# elastic limit

the greatest stress that can be applied to an elastic body without causing permanent deformation. Also called limit of proportionality, proportional limit.
[1860-65]

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maximum stress or force per unit area within a solid material that can arise before the onset of permanent deformation. When stresses up to the elastic limit are removed, the material resumes its original size and shape. Stresses beyond the elastic limit cause a material to yield or flow. For such materials the elastic limit marks the end of elastic (elasticity) behaviour and the beginning of plastic (plasticity) behaviour. For most brittle materials, stresses beyond the elastic limit result in fracture with almost no plastic deformation.

The elastic limit is in principle different from the proportional limit, which marks the end of the kind of elastic behaviour that can be described by Hooke's law, namely, that in which the stress is proportional to the strain (relative deformation) or equivalently that in which the load is proportional to the displacement. The elastic limit nearly coincides with the proportional limit for some elastic materials, so that at times the two are not distinguished; whereas for other materials a region of nonproportional elasticity exists between the two. The proportional limit is the end point of what is called linearly elastic behaviour. See deformation and flow; elasticity.

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Universalium. 2010.

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• Elastic limit — Elastic E*las tic ([ e]*l[a^]s t[i^]k), a. [Formed fr. Gr. elay nein to drive; prob. akin to L. alacer lively, brisk, and E. alacrity: cf. F. [ e]lastique.] 1. Springing back; having a power or inherent property of returning to the form from… …   The Collaborative International Dictionary of English

• Elastic limit — Limit Lim it (l[i^]m [i^]t), n. [From L. limes, limitis: cf. F. limite; or from E. limit, v. See {Limit}, v. t.] 1. That which terminates, circumscribes, restrains, or confines; the bound, border, or edge; the utmost extent; as, the limit of a… …   The Collaborative International Dictionary of English

• Elastic limit — Elastic limit. См. Предел упругости. (Источник: «Металлы и сплавы. Справочник.» Под редакцией Ю.П. Солнцева; НПО Профессионал , НПО Мир и семья ; Санкт Петербург, 2003 г.) …   Словарь металлургических терминов

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