Evaluation of a nonlinear viscoelastic-plastic constitutive model in numerical simulation of thermoplastic polymers for stent application

Abstract To simulate the specific material properties of thermoplastic polymers a suitable constitutive model is essential. The parallel rheological framework (PRF) was calibrated and evaluated in this study as potential for polymer stent application. Tensile well recovery tests with different loading rates were performed using PLLA specimens. In order to calibrate model, conducted simulated accordingly. parameters iteratively varied obtain good accordance simulation tests. contrast elastic plastic models, viscoelastic behavior can be represented nonlinear viscoelastic-plastic PRF model. generated possibly further refined used stents.