Some solids - say, powdered raw materials in a conduit - often become jammed. Are the properties of such jammed solids different to those of ordinary solids? The answer 'yes' comes from a paper in which it is proposed that they should really be considered as belonging to a new class of materials known as fragile matter which, because of its unusual mechanical properties, requires a new theoretical description.
- Andrea J. Liu
- Sidney R. Nagel