Elasticity in construction - Revision history

Designing Buildings: moved Elasticity to Elasticity in construction

2023-01-06T10:00:44Z

moved Elasticity to Elasticity in construction

← Older revision

Revision as of 10:00, 6 January 2023

Designing Buildings at 09:59, 6 January 2023

2023-01-06T09:59:41Z

← Older revision		Revision as of 09:59, 6 January 2023
Line 1:		Line 1:
−	Elasticity describes the ~~behaviour of~~ a material ~~to return~~ to its original shape after an external force or load has caused it to deform. All materials to some degree show elastic characteristics, some more than others~~, such~~ behaviour is a crucial characteristic of building materials without ~~it materials~~ would suffer continuous deformation under load and ultimately collapse.	+	Elasticity describes the degree to which a material returns to its original shape after an external force or load has caused it to deform. All materials to some degree show elastic characteristics, some more so than others. This behaviour is a crucial characteristic of building materials without which they would suffer continuous deformation under load and ultimately collapse.

−	[[File:~~Linear non linear elastic 500~~.jpg]]	+	[[File:Linear_non_linear_elastic_500.jpg\|link=File:Linear_non_linear_elastic_500.jpg]]

−	Linear elasticity occurs when the deformation in a material is proportional to the load applied, on a graph of stress and strain the line is straight ~~and diagonal~~. So, if a person weighing 50kg causes a diving board to deflect by 300mm, and another person weighing 100kg causes an identical board to deflect by 600mm, the diving board is exhibiting linear deflection. Most structural materials are, within limits, linearly elastic and are used within their linearly elastic range. Hooke's law of elasticity ( after the English scientist Robert Hooke in 1660) states that, for relatively small deformations of an object, the displacement or size of the deformation is directly proportional to the deforming force or load ie it is linear.	+	Linear elasticity occurs when the deformation in a material is proportional to the load applied, on a graph of stress and strain the line is straight. So, if a person weighing 50kg causes a diving board to deflect by 300mm, and another person weighing 100kg causes an identical board to deflect by 600mm, the diving board is exhibiting linear deflection. Most structural materials are, within limits, linearly elastic and are used within their linearly elastic range. Hooke's law of elasticity (named after the English scientist Robert Hooke in 1660) states that, for relatively small deformations of an object, the displacement or size of the deformation is directly proportional to the deforming force or load ie it is linear.

−	The point where the elasticity of a material is increasingly less linear and becomes non-linear is call the proportional limit. Non-linear elasticity occurs when the deformation in a material is not always proportional to the load applied, the behaviour changes as load varies. On a graph of stress and strain the line representing the behaviour of the material curves ~~slowly upwards and the diagonally~~.	+	The point where the elasticity of a material is increasingly less linear and becomes non-linear is call the proportional limit. Non-linear elasticity occurs when the deformation in a material is not always proportional to the load applied, the behaviour changes as the load varies. On a graph of stress and strain the line representing the behaviour of the material curves.

−	[[File:~~Elastic plastic graph 600~~.jpg]]	+	[[File:Elastic_plastic_graph_600.jpg\|link=File:Elastic_plastic_graph_600.jpg]]

−	The degree of elasticity will usually depend on the individual structure of a material at a microscopic level. In polymers and rubbers elasticity is created by stretching polymer chains under an applied force, whilst in metals elasticity results from a resizing and reshaping of crystalline cells of the materials structure (lattice) ~~under the action of an externally applied force~~.	+	The degree of elasticity will usually depend on the individual structure of a material at a microscopic level. In polymers and rubbers elasticity is created by stretching polymer chains under an applied force, whilst in metals elasticity results from a resizing and reshaping of crystalline cells of the materials structure (lattice).

−	Elastic materials have an limit which is the maximum stress per unit area it can withstand before being permanently deformed, this is called the elastic limit~~, after~~ this point the material behaviour is plastic (ie it doesn't return to its original form and is permanently deformed)~~. At the end of this plastic range the strength of the material gradually increases until the point at which it fails, this is called the Fracture point~~.	+	Elastic materials have a limit which is the maximum stress per unit area it can withstand before being permanently deformed, this is called the elastic limit. After this point the material behaviour is plastic (ie it doesn't return to its original form and is permanently deformed).

	= Related articles on Designing Buildings =		= Related articles on Designing Buildings =

Editor at 10:16, 14 December 2022

2022-12-14T10:16:26Z

← Older revision		Revision as of 10:16, 14 December 2022
Line 1:		Line 1:
−	Elasticity describes the behaviour of a material to return to its original shape after an external force or load has caused it to deform. All materials to some degree show elastic characteristics, some more than others, such behaviour is a crucial characteristic of building materials without it materials would suffer continuous deformation under load and ultimately collapse~~.The degree of elastcity will usually depend on the individual structure of a material at a microscopic level~~.	+	Elasticity describes the behaviour of a material to return to its original shape after an external force or load has caused it to deform. All materials to some degree show elastic characteristics, some more than others, such behaviour is a crucial characteristic of building materials without it materials would suffer continuous deformation under load and ultimately collapse.

−	The elasticity of polymers and rubbers is created by stretching polymer chains under an applied force whilst ~~the elasticity of~~ metals ~~is caused by~~ resizing and reshaping ~~the~~ crystalline cells of ~~their material~~ structure (~~lattices~~) under the action of an externally applied force.	+	[[File:Linear non linear elastic 500.jpg]]
		+
		+	Linear elasticity occurs when the deformation in a material is proportional to the load applied, on a graph of stress and strain the line is straight and diagonal. So, if a person weighing 50kg causes a diving board to deflect by 300mm, and another person weighing 100kg causes an identical board to deflect by 600mm, the diving board is exhibiting linear deflection. Most structural materials are, within limits, linearly elastic and are used within their linearly elastic range. Hooke's law of elasticity ( after the English scientist Robert Hooke in 1660) states that, for relatively small deformations of an object, the displacement or size of the deformation is directly proportional to the deforming force or load ie it is linear.
		+
		+	The point where the elasticity of a material is increasingly less linear and becomes non-linear is call the proportional limit. Non-linear elasticity occurs when the deformation in a material is not always proportional to the load applied, the behaviour changes as load varies. On a graph of stress and strain the line representing the behaviour of the material curves slowly upwards and the diagonally.
		+
		+	[[File:Elastic plastic graph 600.jpg]]
		+
		+	The degree of elasticity will usually depend on the individual structure of a material at a microscopic level. In polymers and rubbers elasticity is created by stretching polymer chains under an applied force, whilst in metals elasticity results from a resizing and reshaping of crystalline cells of the materials structure (lattice) under the action of an externally applied force.
		+
		+	Elastic materials have an limit which is the maximum stress per unit area it can withstand before being permanently deformed, this is called the elastic limit, after this point the material behaviour is plastic (ie it doesn't return to its original form and is permanently deformed). At the end of this plastic range the strength of the material gradually increases until the point at which it fails, this is called the Fracture point.
		+
		+	= Related articles on Designing Buildings =
		+
		+	* Concept structural design.
		+	* Detailed design.
		+	* Elastic limit.
		+	* Elements of structure in buildings.
		+	* Moment.
		+	* Plasticity.
		+	* Stiffness.
		+	* Structural engineer.
		+	* Structural principles.
		+	* Structural systems for offices.
		+	* Structural vibration.
		+	* Structures at the end of their design life.
		+	* The development of structural membranes.
		+	* Types of structural load.
		+	* Vibrations.
		+
		+	[[Category:DCN_Definition]] [[Category:DCN_Research,_Development_and_Innovation]] [[Category:Definitions]] [[Category:Education]]

Editor at 08:31, 14 December 2022

2022-12-14T08:31:11Z

← Older revision		Revision as of 08:31, 14 December 2022
Line 1:		Line 1:
−	Elasticity describes the behaviour of a material to return to its original shape after an external force or load has caused it to deform. All materials to some degree show elastic characteristics, some more than others ~~and~~ such behaviour will usually depend on the individual structure of a material at a microscopic level.	+	Elasticity describes the behaviour of a material to return to its original shape after an external force or load has caused it to deform. All materials to some degree show elastic characteristics, some more than others, such behaviour is a crucial characteristic of building materials without it materials would suffer continuous deformation under load and ultimately collapse.The degree of elastcity will usually depend on the individual structure of a material at a microscopic level.

	The elasticity of polymers and rubbers is created by stretching polymer chains under an applied force whilst the elasticity of metals is caused by resizing and reshaping the crystalline cells of their material structure (lattices) under the action of an externally applied force.		The elasticity of polymers and rubbers is created by stretching polymer chains under an applied force whilst the elasticity of metals is caused by resizing and reshaping the crystalline cells of their material structure (lattices) under the action of an externally applied force.

Editor: Created page with "Elasticity describes the behaviour of a material to return to its original shape after an external force or load has caused it to deform. All materials to some degree show elasti..."

2022-12-14T07:44:54Z

Created page with "Elasticity describes the behaviour of a material to return to its original shape after an external force or load has caused it to deform. All materials to some degree show elasti..."

New page

Elasticity describes the behaviour of a material to return to its original shape after an external force or load has caused it to deform. All materials to some degree show elastic characteristics, some more than others and such behaviour will usually depend on the individual structure of a material at a microscopic level.

The elasticity of polymers and rubbers is created by stretching polymer chains under an applied force whilst the elasticity of metals is caused by resizing and reshaping the crystalline cells of their material structure (lattices) under the action of an externally applied force.