Strength of Materials - Revision history

DT Online at 15:34, 4 July 2017

2017-07-04T15:34:18Z

← Older revision		Revision as of 15:34, 4 July 2017
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	Equations for other loading conditions can be found in ~~[http://www.amazon.co.uk/gp/~~product~~/0306812835/ref=as_li_qf_sp_asin_il_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN~~=0306812835~~&linkCode~~=~~as2&tag=dton06-21 ''''~~Structures: Or Why Things Don't Fall Down' by J.E.Gordon''']		Equations for other loading conditions can be found in '''<dtamazon product="0306812835" type="text">Structures: Or Why Things Don't Fall Down by J.E.Gordon</dtamazon>'''.

DT Online at 11:39, 21 March 2017

2017-03-21T11:39:45Z

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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.		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 at all.

	'''In short:'''		'''In short:'''

DT Online at 11:36, 21 March 2017

2017-03-21T11:36:21Z

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	The '''[[Young's Modulus]]''' is a fundamental property of the material and '''[[Heat Treatment]]''' processes such as ~~[http://en.wikipedia.org/wiki/Annealing_%28metallurgy%29~~ '''Annealing'''] or ~~[http://en.wikipedia.org/wiki/Work_hardening~~ '''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 '''[[Heat Treatment]]''' processes such as '''[[Heat_Treatment#Annealing\|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.
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	<span style="color: blue">'''Activity:'''</span>		<span style="color: blue">'''Activity:'''</span>

DT Online at 09:52, 5 February 2017

2017-02-05T09:52:54Z

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	[[File:StressStrainGraph1.png\|300px\|right]]		[[File:StressStrainGraph1.png\|300px\|right]]
	The rig shown above is known as a [~~https~~://en.wikipedia.org/wiki/Tensometer'''Tensometer'''] and industrial devices are used to measure how much a material sample stretches under '''[[Stress]]''' to determine tensile properties of materials, such as '''[[Tensile Strength]]'''.		The rig shown above is known as a [http://en.wikipedia.org/wiki/Tensometer'''Tensometer'''] and industrial devices are used to measure how much a material sample stretches under '''[[Stress]]''' to determine tensile properties of materials, such as '''[[Tensile Strength]]'''.


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	The '''[[Stress]]''' divided by the '''[[Strain]]''' during this '''Elastic Stage''' is a measure of the [~~https~~://en.wikipedia.org/wiki/Stiffness '''stiffness'''] of a material and is known as its '''[[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 '''[[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 '''[[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 '''[[Heat Treatment]]''' processes such as [http://en.wikipedia.org/wiki/Annealing_%28metallurgy%29 '''Annealing'''] or [http://en.wikipedia.org/wiki/Work_hardening '''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.
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	<span style="color: blue">'''Activity:'''</span>		<span style="color: blue">'''Activity:'''</span>
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	Equations for other loading conditions can be found in [~~https~~://www.amazon.co.uk/gp/product/0306812835/ref=as_li_qf_sp_asin_il_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0306812835&linkCode=as2&tag=dton06-21 ''''Structures: Or Why Things Don't Fall Down' by J.E.Gordon''']		Equations for other loading conditions can be found in [http://www.amazon.co.uk/gp/product/0306812835/ref=as_li_qf_sp_asin_il_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0306812835&linkCode=as2&tag=dton06-21 ''''Structures: Or Why Things Don't Fall Down' by J.E.Gordon''']

DT Online at 13:12, 4 January 2017

2017-01-04T13:12:52Z

← Older revision		Revision as of 13:12, 4 January 2017
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	The '''[[Young's Modulus]]''' is a fundamental property of the material and '''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 '''[[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.
	----		----
	<span style="color: blue">'''Activity:'''</span>		<span style="color: blue">'''Activity:'''</span>

DT Online at 10:01, 14 November 2016

2016-11-14T10:01:07Z

← Older revision		Revision as of 10:01, 14 November 2016
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	Equations for other loading conditions can be found in [https://www.amazon.co.uk/gp/product/0306812835/ref=as_li_qf_sp_asin_il_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0306812835&linkCode=as2&tag=dton06-21 ''''Structures: Or Why Things Don't Fall Down' by J.E.Gordon''']		Equations for other loading conditions can be found in [https://www.amazon.co.uk/gp/product/0306812835/ref=as_li_qf_sp_asin_il_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0306812835&linkCode=as2&tag=dton06-21 ''''Structures: Or Why Things Don't Fall Down' by J.E.Gordon''']

DT Online at 09:59, 14 November 2016

2016-11-14T09:59:11Z

← Older revision		Revision as of 09:59, 14 November 2016
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	Equations for other loading conditions can be found in [https://~~books~~.~~google~~.co.uk/~~books~~?id=~~8p5xgPPJIRYC~~&~~redir_esc~~=y ''''Structures' by J.E.Gordon ~~''(ISBN 0 14 02.1961 7)''~~''']		Equations for other loading conditions can be found in [https://www.amazon.co.uk/gp/product/0306812835/ref=as_li_qf_sp_asin_il_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0306812835&linkCode=as2&tag=dton06-21 ''''Structures: Or Why Things Don't Fall Down' by J.E.Gordon''']

DT Online: Corrected Category

2016-04-22T15:29:42Z

Corrected Category

← Older revision		Revision as of 15:29, 22 April 2016
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	[[Category:Structures ~~and Environments~~]]		[[Category:Structures]]
	[[Category:Materials and Components]]		[[Category:Materials and Components]]
	[[Category:Terminology]]		[[Category:Terminology]]

DT Online: Added Note

2016-02-27T12:15:28Z

Added Note

← Older revision		Revision as of 12:15, 27 February 2016
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	Designers and engineers must know the properties of the materials they use to ensure they will stand up to the intended purpose - otherwise the results can be disastrous!		Designers and engineers must know the properties of the materials they use to ensure they will stand up to the intended purpose - otherwise the results can be disastrous!
			----
			<span style="color: green">'''Note:'''
			The on-line 'knowledge engine', '''[[Wolfram Alpha]]''' can be interrogated to find the characteristics, physical values and much more with regard to most common materials - see the [http://www.wolframalpha.com/examples/Materials.html '''Materials'''] section for examples.
			</span>
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	__TOC__		__TOC__
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	=====Stress and Strain=====		=====Stress and Strain=====


	[[File:ConcretePillars2.png\|200px\|right]]		[[File:ConcretePillars2.png\|200px\|right]]

DT Online: Corrected Link

2015-12-27T18:38:10Z

Corrected Link

← Older revision		Revision as of 18:38, 27 December 2015
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	Equations for other loading conditions can be found in ''''Structures' by J.E.Gordon ''(ISBN 0 14 02.1961 7)'''''		Equations for other loading conditions can be found in [https://books.google.co.uk/books?id=8p5xgPPJIRYC&redir_esc=y ''''Structures' by J.E.Gordon ''(ISBN 0 14 02.1961 7)''''']