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Citation bot (talk | contribs) Added bibcode. | Use this bot. Report bugs. | Suggested by BorgQueen | Category:Materials science | #UCB_Category 197/431 |
Mucketymuck (talk | contribs) m Clarification, as “strain” might be taken in quick reading as a verb: they resist shear flow and they strain linearly under stress. |
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{{Continuum mechanics|cTopic=rheology}}
In [[materials science]] and [[continuum mechanics]], '''viscoelasticity''' is the property of [[materials]] that exhibit both [[Viscosity|viscous]] and [[Elasticity (physics)|elastic]] characteristics when undergoing [[deformation (engineering)|deformation]]. Viscous materials, like water, resist both [[shear flow]] and [[Strain (materials science)|strain]] linearly with time when a [[Stress (physics)|stress]] is applied. Elastic materials strain when stretched and immediately return to their original state once the stress is removed.
Viscoelastic materials have elements of both of these properties and, as such, exhibit time-dependent strain. Whereas elasticity is usually the result of [[chemical bond|bond]] stretching along [[crystallographic plane]]s in an ordered solid, viscosity is the result of the diffusion of atoms or molecules inside an [[amorphous]] material.<ref name=Meyers>Meyers and Chawla (1999): "Mechanical Behavior of Materials", 98-103.</ref>
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