Flashcards for The Mechanical Properties of Solids
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.
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.
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.
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.
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
Define a Tough Material.
Tough materials are really hard to break. it is a measure of how much energy they can absorb before breaking.