Materials Definitions

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Tensile Force
A force which produces extension
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Compressive Force
A force which compresses an object
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Elastic Deformation
The material will return to its original length when the force is removed.
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Plastic Deformation
Permanent structural changes occur, and the material doesn't return to its original length when the force is removed.
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Hooke's Law
Within the elastic limit of a material, the extension of the elastic body is proportional to the force producing it.
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Force Constant, K
A measure of the stiffness of the elastic body
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Loading curve
A force-extension graph.
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Unloading curve
Removal of the force
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Hysterisis Loop
A loop formed from the loading and unloading curves of a force extension graph
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Tensile Stress
Force applied per unit cross-sectional area
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Tensile Strain
Fractional change in the original length of the wire
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Ductile
The material can easily be drawn into wires or hammered into thin sheets
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Limit of Proportionality
The point on a force-extension graph where the stress is no longer directly proportional to the strain.
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Elastic Limit
Elastic Deformation occurs up until the elastic limit.
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Yield Points
Where the material extends rapidly.
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Ultimate Tensile Strength
The maximum stress a material can withstand when being stretched, before it breaks.
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Breaking Point
The point at which the material actually breaks.
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Breaking Strength
The stress value at the breaking point.
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Strong Material
A strong material is one with a high ultimate tensile strength.
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Young's Modulus
The ratio of stress to strain.
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Brittle
A material which shows elastic behaviour up until its breaking point, without plastic deformation.
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Polymeric
A material which consists of long molecular chains.
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Other cards in this set

Card 2

Front

A force which compresses an object

Back

Compressive Force

Card 3

Front

The material will return to its original length when the force is removed.

Back

Preview of the back of card 3

Card 4

Front

Permanent structural changes occur, and the material doesn't return to its original length when the force is removed.

Back

Preview of the back of card 4

Card 5

Front

Within the elastic limit of a material, the extension of the elastic body is proportional to the force producing it.

Back

Preview of the back of card 5
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