Jmdonev: 1 revision imported

2018-07-21T01:12:56Z

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Jmdonev at 19:20, 27 June 2018

2018-06-27T19:20:42Z

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	[[Category:Done ~~2015~~-01-15 ]]		[[Category:Done 2018-07-20]]
	~~<onlyinclude>Objects deform when pushed, pulled, and twisted~~. ~~'''Elasticity'''~~ is ~~the measure~~ of ~~the amount that the object can return~~ to its original shape after ~~these external [[force]]s~~ and ~~[[pressure]]s stop~~.~~</onlyinclude>~~<ref ~~name=Knight~~>~~R. D. Knight~~, ~~"Elasticity~~," ~~in ''Physics for Scientists and Engineers: A Strategic Approach~~,~~'' 2nd ed~~. ~~San Francisco~~, U.S.A.: ~~Pearson Addison~~-~~Wesley, 2008, pp. 278~~.</ref> ~~This is what allows springs to store [[elastic potential energy~~]].		[[File:elastic spring wire.jpg\|thumb\|right\|350px\|Figure 1. A spring wire is an example of elasticity, since it returns to its original shape, after being pulled and pushed on.<ref>]"Free Image on Pixabay - Spring, Helical, Metal, Steel", Pixabay.com, 2018. [Online]. Available: https://pixabay.com/en/spring-helical-metal-steel-1453075/. [Accessed: 15- Jun- 2018].</ref>]]

	~~The opposite of elasticity is plasticity;~~ when ~~something is stretched~~, and ~~it stays stretched, the material~~ is ~~said to be plastic. When energy goes into changing~~ the ~~shape~~ of ~~some material and it stays changed,~~ that ~~is said to be plastic deformation. When~~ the ~~material goes back~~ to its original ~~form, that'~~s ~~elastic deformation~~.<ref name=~~Hawkes~~>~~Hawkes et al~~, "~~Deformation and~~ Elasticity," in ''Physics for Scientists and Engineers,'' ~~1st~~ ed. ~~Toronto~~: ~~Cengage~~, ~~2014~~, pp. ~~265-268~~.</ref>		<onlyinclude>Objects deform when pushed, pulled, and twisted. '''Elasticity''' is the measure of the amount that the object can return to its original shape after these external [[force]]s and [[pressure]]s stop.</onlyinclude><ref name=Knight>R. D. Knight, "Elasticity," in ''Physics for Scientists and Engineers: A Strategic Approach,'' 2nd ed. San Francisco, U.S.A.: Pearson Addison-Wesley, 2008, pp. 278.</ref> This is what allows springs to store [[elastic potential energy]].

	Most materials have an amount of force or pressure for which they deform elastically~~, and if~~ more force or pressure is applied, then they have plastic deformation. Materials that have a fair amount of plastic deformation before breaking are said to be '''ductile'''.<ref name="Hawkes"/> Materials that can't stretch or bend much without breaking are said to be '''brittle'''. [[Copper]] is quite ductile, which is part of why it is used for [[wire]]s (most [[metal]]s are ductile, but copper especially so). Glass and ceramics are often brittle; they will break rather than bend!
			The opposite of elasticity is '''plasticity'''; when something is stretched, and it stays stretched, the material is said to be plastic. When energy goes into changing the shape of some material and it stays changed, that is said to be ''plastic deformation''. When the material goes back to its original form, that's ''elastic deformation.''<ref name=Hawkes>Hawkes et al, "Deformation and Elasticity," in ''Physics for Scientists and Engineers,'' 1st ed. Toronto: Cengage, 2014, pp. 265-268.</ref> [[Mechanical energy]] is lost whenever an object undergoes plastic deformation. Manufacturing goods from raw materials involves a great deal of plastic deformation. For example, rolling steel into a particular shape (like rebar for construction) involves plastic deformation, since a new shape is created.
			[[File:plasticity .jpg\|thumb\|right\|350px\|Figure 2. Plastic wrap is an example of plasticity. After stretched—it stays stretched.<ref>"File:Pvc-Film.jpg - Wikimedia Commons", Commons.wikimedia.org, 2018. [Online]. Available: https://commons.wikimedia.org/wiki/File:Pvc-Film.jpg. [Accessed: 15- Jun- 2018].</ref>]]

			Most materials have an amount of force or pressure for which they deform elastically. If more force or pressure is applied, then they have plastic deformation. Materials that have a fair amount of plastic deformation before breaking are said to be '''ductile'''.<ref name="Hawkes"/> Materials that can't stretch or bend much without breaking are said to be '''brittle'''. [[Copper]] is quite ductile, which is part of why it is used for [[wire]]s (most [[metal]]s are ductile (but copper especially so). Glass and ceramics are often brittle; they will break rather than bend!

	To learn more about elasticity please see [http://hyperphysics.phy-astr.gsu.edu/hbase/permot2.html#c2 hyperphysics].		To learn more about elasticity please see [http://hyperphysics.phy-astr.gsu.edu/hbase/permot2.html#c2 hyperphysics].

			==For Further Reading==
			*[[Elastic potential energy]]
			*[[Malleable]]
			*[[Copper]]
			*[[Metal]]
			*Or explore a [[Special:Random\|random page]]


	== Reference ==		== Reference ==
	{{reflist}}		{{reflist}}
	[[Category:Uploaded]]		[[Category:Uploaded]]

J.williams: 1 revision imported

2015-08-26T21:31:01Z

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J.williams at 16:53, 12 August 2015

2015-08-12T16:53:09Z

New page

[[Category:Done 2015-01-15 ]]
<onlyinclude>Objects deform when pushed, pulled, and twisted. '''Elasticity''' is the measure of the amount that the object can return to its original shape after these external [[force]]s and [[pressure]]s stop.</onlyinclude><ref name=Knight>R. D. Knight, "Elasticity," in ''Physics for Scientists and Engineers: A Strategic Approach,'' 2nd ed. San Francisco, U.S.A.: Pearson Addison-Wesley, 2008, pp. 278.</ref> This is what allows springs to store [[elastic potential energy]].

The opposite of elasticity is plasticity; when something is stretched, and it stays stretched, the material is said to be plastic. When energy goes into changing the shape of some material and it stays changed, that is said to be plastic deformation. When the material goes back to its original form, that's elastic deformation.<ref name=Hawkes>Hawkes et al, "Deformation and Elasticity," in ''Physics for Scientists and Engineers,'' 1st ed. Toronto: Cengage, 2014, pp. 265-268.</ref>

Most materials have an amount of force or pressure for which they deform elastically, and if more force or pressure is applied, then they have plastic deformation. Materials that have a fair amount of plastic deformation before breaking are said to be '''ductile'''.<ref name="Hawkes"/> Materials that can't stretch or bend much without breaking are said to be '''brittle'''. [[Copper]] is quite ductile, which is part of why it is used for [[wire]]s (most [[metal]]s are ductile, but copper especially so). Glass and ceramics are often brittle; they will break rather than bend!

To learn more about elasticity please see [http://hyperphysics.phy-astr.gsu.edu/hbase/permot2.html#c2 hyperphysics].

== Reference ==
{{reflist}}
[[Category:Uploaded]]

Elasticity vs plasticity - Revision history

Jmdonev: 1 revision imported

Jmdonev at 19:20, 27 June 2018

J.williams: 1 revision imported

J.williams at 16:53, 12 August 2015