Focus: To characterize the finite deformation behavior of shape memory polymers (SMPs) and to develop and implement constitutive models
for describing and predicting this behavior.
Thermomechanical experiments are performed to characterize the
material response for finite deformations (>10% strain). The experiments use optical strain measurement techniques (e.g., laser, digital image correlation).
The material properties are used as input to finite deformation constitutive models.
The models are numerically implemented in a user material subroutine
(UMAT) in ABAQUS, validated by comparing with additional experimental data, and then used to predict the material response for free recovery and constrained recovery boundary conditions.