Brittleness - Revision history

DT Online at 11:42, 21 March 2017

2017-03-21T11:42:16Z

← Older revision		Revision as of 11:42, 21 March 2017
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	[[File:Crisps.png\|300px\|right]]		[[File:Crisps.png\|300px\|right]]
	Materials which are [https://en.wikipedia.org/wiki/Brittleness '''Brittle'''] break suddenly with little or no deformation first - like a stick of chalk or a potato crisp! ''(ie. they have little or no '''[[~~Young's Modulus\|~~Plasticity]]''')''. This can make them very dangerous in engineering situations since components may snap without warning, but they are also strong in '''[[Compression]]'''.		Materials which are [https://en.wikipedia.org/wiki/Brittleness '''Brittle'''] break suddenly with little or no deformation first - like a stick of chalk or a potato crisp! ''(ie. they have little or no '''[[Plasticity]]''')''. This can make them very dangerous in engineering situations since components may snap without warning, but they are also strong in '''[[Compression]]'''.

DT Online at 10:16, 13 November 2016

2016-11-13T10:16:23Z

← Older revision		Revision as of 10:16, 13 November 2016
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	This achieved for [https://en.wikipedia.org/wiki/Prestressed_concrete '''Pre-Stressed Concrete Beams'''] for example by casting the concrete around steel rods or wires which have been first stretched such that when the concrete sets they continue to pull the ends of the beam inwards. Similarly, [https://en.wikipedia.org/wiki/Toughened_glass '''Toughened Glass'''] is heat treated such that the resulting '''''tempering''''' puts the inner surfaces into tension.thus pulling the outer surfaces into compression		This achieved for [https://en.wikipedia.org/wiki/Prestressed_concrete '''Pre-Stressed Concrete Beams'''] for example by casting the concrete around steel rods or wires which have been first stretched such that when the concrete sets they continue to pull the ends of the beam inwards. Similarly, [https://en.wikipedia.org/wiki/Toughened_glass '''Toughened Glass'''] is heat treated such that the resulting '''''tempering''''' puts the inner surfaces into tension.thus pulling the outer surfaces into compression to close up any cracks before they can propagate. This is achieved by rapidly air cooling the outer layer whilst the inner layer is left free to flow and pull against the solidified outer as it cools naturally.


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

DT Online at 10:08, 13 November 2016

2016-11-13T10:08:53Z

← Older revision		Revision as of 10:08, 13 November 2016
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	This achieved for [https://en.wikipedia.org/wiki/Prestressed_concrete '''Pre-Stressed Concrete Beams'''] for example by casting the concrete around steel rods or wires which have been first stretched such that when the concrete sets they continue to pull the ends of the beam inwards. Similarly, [https://en.wikipedia.org/wiki/Toughened_glass '''Toughened Glass'''] is heat treated such that the resulting '''''tempering''''' puts the ~~outer~~ surfaces into ~~compression and~~ the ~~inner~~ surfaces into ~~tension.~~		This achieved for [https://en.wikipedia.org/wiki/Prestressed_concrete '''Pre-Stressed Concrete Beams'''] for example by casting the concrete around steel rods or wires which have been first stretched such that when the concrete sets they continue to pull the ends of the beam inwards. Similarly, [https://en.wikipedia.org/wiki/Toughened_glass '''Toughened Glass'''] is heat treated such that the resulting '''''tempering''''' puts the inner surfaces into tension.thus pulling the outer surfaces into compression


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

DT Online at 10:05, 13 November 2016

2016-11-13T10:05:50Z

← Older revision		Revision as of 10:05, 13 November 2016
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	One solution when using normally '''Brittle''' materials such as [https://en.wikipedia.org/wiki/Concrete '''Concrete'''] is to keep them in '''[[Compression]]''' even when they are deployed in situations which may expose them to '''[[Tension\|Tensile Forces]]'''.		One solution when using normally '''Brittle''' materials such as [https://en.wikipedia.org/wiki/Concrete '''Concrete'''] is to keep them in '''[[Compression]]''' even when they are deployed in situations which may expose them to '''[[Tension\|Tensile Forces]]'''.


	This achieved for [https://en.wikipedia.org/wiki/Prestressed_concrete '''Pre-Stressed Concrete Beams'''] for example by casting the concrete around steel rods or wires which have been first stretched such that when the concrete sets they continue to pull the ends of the beam inwards.		This achieved for [https://en.wikipedia.org/wiki/Prestressed_concrete '''Pre-Stressed Concrete Beams'''] for example by casting the concrete around steel rods or wires which have been first stretched such that when the concrete sets they continue to pull the ends of the beam inwards. Similarly, [https://en.wikipedia.org/wiki/Toughened_glass '''Toughened Glass'''] is heat treated such that the resulting '''''tempering''''' puts the outer surfaces into compression and the inner surfaces into tension.


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

DT Online: Completed article

2016-11-12T17:32:49Z

Completed article

← Older revision		Revision as of 17:32, 12 November 2016
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	[[File:Crisps.png\|300px\|right]]		[[File:Crisps.png\|300px\|right]]
	Materials which are [https://en.wikipedia.org/wiki/Brittleness '''Brittle'''] break suddenly with ~~litle~~ or no deformation first - like a stick of chalk or a potato crisp! ''(ie. they have little or no '''[[~~http://wiki.dtonline.org/index.php/~~Young~~%27s_Modulus~~\|Plasticity]]'''. This can make them very dangerous in engineering situations		Materials which are [https://en.wikipedia.org/wiki/Brittleness '''Brittle'''] break suddenly with little or no deformation first - like a stick of chalk or a potato crisp! ''(ie. they have little or no '''[[Young's Modulus\|Plasticity]]''')''. This can make them very dangerous in engineering situations since components may snap without warning, but they are also strong in '''[[Compression]]'''.


			One solution when using normally '''Brittle''' materials such as [https://en.wikipedia.org/wiki/Concrete '''Concrete'''] is to keep them in '''[[Compression]]''' even when they are deployed in situations which may expose them to '''[[Tension\|Tensile Forces]]'''.


			This achieved for [https://en.wikipedia.org/wiki/Prestressed_concrete '''Pre-Stressed Concrete Beams'''] for example by casting the concrete around steel rods or wires which have been first stretched such that when the concrete sets they continue to pull the ends of the beam inwards.


			[[Category:Terminology]]

DT Online: Created article

2016-11-12T17:17:32Z

Created article

New page

[[File:Crisps.png|300px|right]]
Materials which are [https://en.wikipedia.org/wiki/Brittleness '''Brittle'''] break suddenly with litle or no deformation first - like a stick of chalk or a potato crisp! ''(ie. they have little or no '''[[http://wiki.dtonline.org/index.php/Young%27s_Modulus|Plasticity]]'''. This can make them very dangerous in engineering situations