Stretch ratio

Description

The stretch ratio or extension ratio is a measure of the extensional or normal strain of a differential line element, which can be defined at either the undeformed configuration or the deformed configuration. It is defined as the ratio between the final length ℓ and the initial length L of the material line

Related formulas

Variables

λStretch ratio (dimensionless)
lFinal length (m)
LInitial length (m)