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Define A Brittle Material.
- If you apply a force to a brittle material, it won't deform plastically, but will suddenly snap when the force gets to a certain size.
- E.g. A chocolate bar.
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Define A Ductile Material.
- You can change the shape of ductile materials by drawing them into wires or other shapes. The important thing is they keep their strength when they are deformed like this.
- E.g. Ski lift wires.
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Define a Malleable Material.
- The shape of malleable can be changed fairly easily by for example; hammering or rolling. however they will not necessarily keep their strength.
- E.g. Gold
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Define a Hard Material.
- If you try to cut, dent or scratch a hard material, it would probably have very little effect. Hard materials are resistant to cutting, indentation and abrasion.
- E.g. Diamond
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Define a Stiff Material.
- Changing the shape of stiff materials is really difficult as they are resistant to both bending and stretching. stiffness is measured by youngs modulus - the higher the value, the stiffer the material is.
- E.g. A safety helmet
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Define a Tough Material.
- Tough materials are really hard to break. it is a measure of how much energy they can absorb before breaking.
- E.g. A Kayak.
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Youngs modulus :E = FL
AX
F = ?
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Youngs modulus :E = FL
AX
A = ?
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Youngs modulus :E = FL
AX
L= ?
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