The Poisson’s ratio is a material property that relates the lateral strain (strain perpendicular to the applied stress) to the axial strain (strain parallel to the applied stress) in a material when subjected to stress. It is denoted by the symbol (nu) and is a dimensionless quantity.
The formula for Poisson’s ratio () in terms of stress is given by:
where:
- (nu) is the Poisson’s ratio (dimensionless),
- lat is the lateral strain,
- axial is the axial strain.