The purpose of this work is to propose a mathematical
model for describing mechanical behavior of PTFE in tensile
loading under different strain rates. The (large) strain
measures obtained using a non-contact video extensometer
are used as input to the control system of the testing
machine. A theoretical model is proposed that is based on
classical saturation and power law models. The main goal is
to predict the stress-strain curve under different strain rates
using model equations that combine enough mathematical
simplicity to allow their use in engineering problems with
the capability of describing complex non-linear mechanical
behavior. Also,