Young's Modulus - Revision history

DT Online at 11:47, 21 March 2017

2017-03-21T11:47:18Z

← Older revision		Revision as of 11:47, 21 March 2017
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	The '''Young's Modulus''' is a fundamental property of the material and is unchanged by '''[[Heat Treatment]]''' processes such as '''[[Heat Treatment\|Annealing]]''' or '''[[~~Heat Treatment~~\|Work Hardening]]''' - you simply change degrees of '''[[Elasticity]]''' and '''[[Plasticity]]'''. The shape of the '''Stress/Strain Curve''' therefore changes but the area under it remains the same because the work done to fracture is constant.		The '''Young's Modulus''' is a fundamental property of the material and is unchanged by '''[[Heat Treatment]]''' processes such as '''[[Heat Treatment\|Annealing]]''' or '''[[Crystalline_Structures#Work_Hardening\|Work Hardening]]''' - you simply change degrees of '''[[Elasticity]]''' and '''[[Plasticity]]'''. The shape of the '''Stress/Strain Curve''' therefore changes but the area under it remains the same because the work done to fracture is constant.

	[[Category:Terminology]]		[[Category:Terminology]]

DT Online at 11:12, 21 March 2017

2017-03-21T11:12:31Z

← Older revision		Revision as of 11:12, 21 March 2017
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	The '''Young's Modulus''' is a fundamental property of the material and is unchanged by '''[[Heat Treatment]]''' processes such as '''[[Heat Treatment\|Annealing]]''' or '''[[Heat Treatment\|Work Hardening]]''' - you simply change degrees of ~~[http://en.wikipedia.org/wiki/Elasticity_%28physics%29~~ '''Elasticity'''] and ~~[http://en.wikipedia.org/wiki/Plasticity_%28physics%29~~ '''Plasticity''']. The shape of the '''Stress/Strain Curve''' therefore changes but the area under it remains the same because the work done to fracture is constant.		The '''Young's Modulus''' is a fundamental property of the material and is unchanged by '''[[Heat Treatment]]''' processes such as '''[[Heat Treatment\|Annealing]]''' or '''[[Heat Treatment\|Work Hardening]]''' - you simply change degrees of '''[[Elasticity]]''' and '''[[Plasticity]]'''. The shape of the '''Stress/Strain Curve''' therefore changes but the area under it remains the same because the work done to fracture is constant.

	[[Category:Terminology]]		[[Category:Terminology]]

DT Online at 09:48, 5 February 2017

2017-02-05T09:48:07Z

← Older revision		Revision as of 09:48, 5 February 2017
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	The '''[[Stress]]''' divided by the '''[[Strain]]''' during this '''Elastic Stage''' is a measure of the [http://en.wikipedia.org/wiki/Stiffness '''stiffness'''] of a material and is known as its [~~https~~://en.wikipedia.org/wiki/Young's_modulus '''Young's Modulus'''] or [~~https~~://en.wikipedia.org/wiki/Elastic_modulus '''Modulus of Elasticity''']		The '''[[Stress]]''' divided by the '''[[Strain]]''' during this '''Elastic Stage''' is a measure of the [http://en.wikipedia.org/wiki/Stiffness '''stiffness'''] of a material and is known as its [http://en.wikipedia.org/wiki/Young's_modulus '''Young's Modulus'''] or [http://en.wikipedia.org/wiki/Elastic_modulus '''Modulus of Elasticity''']


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	The '''Young's Modulus''' is a fundamental property of the material and is unchanged by '''[[Heat Treatment]]''' processes such as '''[[Heat Treatment\|Annealing]]''' or '''[[Heat Treatment\|Work Hardening]]''' - you simply change degrees of [~~https~~://en.wikipedia.org/wiki/Elasticity_%28physics%29 '''Elasticity'''] and [~~https~~://en.wikipedia.org/wiki/Plasticity_%28physics%29 '''Plasticity''']. The shape of the '''Stress/Strain Curve''' therefore changes but the area under it remains the same because the work done to fracture is constant.		The '''Young's Modulus''' is a fundamental property of the material and is unchanged by '''[[Heat Treatment]]''' processes such as '''[[Heat Treatment\|Annealing]]''' or '''[[Heat Treatment\|Work Hardening]]''' - you simply change degrees of [http://en.wikipedia.org/wiki/Elasticity_%28physics%29 '''Elasticity'''] and [http://en.wikipedia.org/wiki/Plasticity_%28physics%29 '''Plasticity''']. The shape of the '''Stress/Strain Curve''' therefore changes but the area under it remains the same because the work done to fracture is constant.

	[[Category:Terminology]]		[[Category:Terminology]]

DT Online at 13:13, 4 January 2017

2017-01-04T13:13:01Z

← Older revision		Revision as of 13:13, 4 January 2017
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	Much can be determined about a material from its '''Stress/Strain Curve''' - for example, ~~[http://en.wikipedia.org/wiki/Ductile~~ '''Ductile'''] materials will exhibit an extended '''Plastic Stage''' whereas ~~[http://en.wikipedia.org/wiki/Brittle~~ '''Brittle'''] materials would have little or none at at all. In short:		Much can be determined about a material from its '''Stress/Strain Curve''' - for example, '''[[Ductility\|Ductile]]''' materials will exhibit an extended '''Plastic Stage''' whereas '''[[Brittleness\|Brittle]]''' materials would have little or none at all. In short:
	*a stiffer material will exhibit a steeper slope		*a stiffer material will exhibit a steeper slope
	*a brittle material will lack a plastic region		*a brittle material will lack a plastic region
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	The '''Young's Modulus''' is a fundamental property of the material and is unchanged by '''[[Heat Treatment]]''' processes such as ~~[https://en.wikipedia.org/wiki/Annealing_%28metallurgy%29~~ '''Annealing'''] or ~~[https://en.wikipedia.org/wiki/Work_hardening~~ '''Work Hardening'''] - you simply change degrees of [https://en.wikipedia.org/wiki/Elasticity_%28physics%29 '''Elasticity'''] and [https://en.wikipedia.org/wiki/Plasticity_%28physics%29 '''Plasticity''']. The shape of the '''Stress/Strain Curve''' therefore changes but the area under it remains the same because the work done to fracture is constant.		The '''Young's Modulus''' is a fundamental property of the material and is unchanged by '''[[Heat Treatment]]''' processes such as '''[[Heat Treatment\|Annealing]]''' or '''[[Heat Treatment\|Work Hardening]]''' - you simply change degrees of [https://en.wikipedia.org/wiki/Elasticity_%28physics%29 '''Elasticity'''] and [https://en.wikipedia.org/wiki/Plasticity_%28physics%29 '''Plasticity''']. The shape of the '''Stress/Strain Curve''' therefore changes but the area under it remains the same because the work done to fracture is constant.

	[[Category:Terminology]]		[[Category:Terminology]]

DT Online at 13:06, 4 January 2017

2017-01-04T13:06:24Z

← Older revision		Revision as of 13:06, 4 January 2017
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	The '''Young's Modulus''' is a fundamental property of the material and is unchanged by '''Heat Treatment''' processes such as [https://en.wikipedia.org/wiki/Annealing_%28metallurgy%29 '''Annealing'''] or [https://en.wikipedia.org/wiki/Work_hardening '''Work Hardening'''] - you simply change degrees of [https://en.wikipedia.org/wiki/Elasticity_%28physics%29 '''Elasticity'''] and [https://en.wikipedia.org/wiki/Plasticity_%28physics%29 '''Plasticity''']. The shape of the '''Stress/Strain Curve''' therefore changes but the area under it remains the same because the work done to fracture is constant.		The '''Young's Modulus''' is a fundamental property of the material and is unchanged by '''[[Heat Treatment]]''' processes such as [https://en.wikipedia.org/wiki/Annealing_%28metallurgy%29 '''Annealing'''] or [https://en.wikipedia.org/wiki/Work_hardening '''Work Hardening'''] - you simply change degrees of [https://en.wikipedia.org/wiki/Elasticity_%28physics%29 '''Elasticity'''] and [https://en.wikipedia.org/wiki/Plasticity_%28physics%29 '''Plasticity''']. The shape of the '''Stress/Strain Curve''' therefore changes but the area under it remains the same because the work done to fracture is constant.

	[[Category:Terminology]]		[[Category:Terminology]]

DT Online: Created article

2015-12-21T23:53:37Z

Created article

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[[File:StressStrainGraph1.png|350px|right]]
As material samples are stretched, initially, the '''[[Stress]]''' is directly proportional to the '''[[Strain]]''' - producing the straight line as shown on the graph. The material is behaving in much the same way as a spring would under tension and, if the force is removed, the material returns to its original length. The material is obeying [http://en.wikipedia.org/wiki/Hookes_law '''Hooke's Law'''] and this phase is known as the '''Elastic Stage'''.

The '''[[Stress]]''' divided by the '''[[Strain]]''' during this '''Elastic Stage''' is a measure of the [http://en.wikipedia.org/wiki/Stiffness '''stiffness'''] of a material and is known as its [https://en.wikipedia.org/wiki/Young's_modulus '''Young's Modulus'''] or [https://en.wikipedia.org/wiki/Elastic_modulus '''Modulus of Elasticity''']

If a force is continued to be applied beyond this phase, the material reaches a point at which it stays permanently stretched. This is the '''Yield Point''' or '''Elastic Limit''' and beyond this, during its '''Plastic Stage''', the material will continue to remain permanently deformed until eventually it breaks.
[[File:StressStrainGraph2.png|300px|right]]

Much can be determined about a material from its '''Stress/Strain Curve''' - for example, [http://en.wikipedia.org/wiki/Ductile '''Ductile'''] materials will exhibit an extended '''Plastic Stage''' whereas [http://en.wikipedia.org/wiki/Brittle '''Brittle'''] materials would have little or none at at all. In short:
*a stiffer material will exhibit a steeper slope
*a brittle material will lack a plastic region
*a stronger material will show a higher '''[[Tensile Strength|U.T.S.]]'''

The '''Young's Modulus''' is a fundamental property of the material and is unchanged by '''Heat Treatment''' processes such as [https://en.wikipedia.org/wiki/Annealing_%28metallurgy%29 '''Annealing'''] or [https://en.wikipedia.org/wiki/Work_hardening '''Work Hardening'''] - you simply change degrees of [https://en.wikipedia.org/wiki/Elasticity_%28physics%29 '''Elasticity'''] and [https://en.wikipedia.org/wiki/Plasticity_%28physics%29 '''Plasticity''']. The shape of the '''Stress/Strain Curve''' therefore changes but the area under it remains the same because the work done to fracture is constant.

[[Category:Terminology]]