# Mechanical Properties of Solids - Greg Wilkinson

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1. 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.
2. 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.
3. 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
4. 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
5. 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
6. 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.
7. Youngs modulus :E = FL
AX

F = ?
• F = EAX
•        L
8. Youngs modulus :E = FL
AX
A = ?
• A = FL
•       EX
9. Youngs modulus :E = FL
AX
L= ?
• L = EAX
•        L
 Author: McAuley ID: 175692 Card Set: Mechanical Properties of Solids - Greg Wilkinson Updated: 2012-10-05 09:10:57 Tags: Physics Mechanical Properties Solids Greg Wilkinson Folders: Description: Flashcards for The Mechanical Properties of Solids Show Answers: