A Finite Strain Quasi-Non-Linear Thermoviscoelastic Model for Semi-Crystalline Thermoplastic Polymers subjected to Cyclic Loading
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A quasi-non-linear thermoviscoelastic model using Maxwell elements with strain dependent moduli in the finite strain regime is presented in this work to model large elastic non-linearity. It is combined with thermoviscoplasticity and a reversible Mullins-like damage to capture plasticity and unloading response, respectively. Characterisation of the model is performed through Dynamic Mechanical Analyses and Uniaxial Tests, for which, a simple procedure is outlined for conventional semi-crystalline thermoplastic polymer, polypropylene.
