Testing and analysis of solid polymers under large monotonic and long-term cyclic deformation

Thierry Barriere (1) , Xavier Gabrion (1) , Sami Holopainen (2) , Jarno Jokinen (2)

1 FEMTO-ST - Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174)
2 University of Tampere - University of Tampere

The deformation behavior of solid polymers under isothermal, quasi-static loadings is investigated. A comprehensive test program consisting of tension, torsion, and combinations thereof was conducted on a polycarbonate polymer under both monotonic and long-term cyclic loadings. The effects of different loading modes, creep load conditions, mean stress, stress amplitude, and loading rate are addressed. The possibility of simulating costly tests with existing models is also demonstrated. A viscoelastic-viscoplastic constitutive model proposed by Barriere et al. 2019 is applied for this purpose. Compared to state-of-the-art models, this model requires a reduced set of material parameters to be defined. The validation experiments demonstrate the model robustly predicts various loading scenarios. In light of both the experimental and model results, the material shows an apparent hardening with increasing loading rates, and the ratcheting strain increases with the stress amplitude

Domaines: Mécanique [physics]

Thierry Barriere, Xavier Gabrion, Sami Holopainen, Jarno Jokinen. Testing and analysis of solid polymers under large monotonic and long-term cyclic deformation. International Journal of Plasticity, 2020, 135, pp.102781 (22). ⟨hal-03020553⟩