The factor is used to describe the influence of geometry of the reinforcing phase on a particular property. This factor is different for different properties in the same composite. The table below summarizes this factor for many typical geometry's.

Geometry | E _{x} | E _{y} | n | G |

Aligned continuous fibres | or | or | ||

Spherical particles | ||||

Oriented short fibres | ||||

Oriented plates | ||||

Oriented whiskers |

In all composite systems the equations are not valid above f=0.9 since these volume fractions of fibres are impossible geometrically.