Plasticity and thermally-induced recovery in polycarbonate

Cherief, Mohammed Nadhir D.; Zairi, Fahmi; Ding, Ning; Gloaguen, Jean-Michel; Nait-Abdelaziz, Moussa; Benguediab, Mohamed

Document type :

Article dans une revue scientifique: Article original

DOI :

10.1016/j.mechmat.2020.103515

Permalink :

http://hdl.handle.net/20.500.12210/75179

Title :

Plasticity and thermally-induced recovery in polycarbonate

Author(s) :

Cherief, Mohammed Nadhir D. [Auteur]
Zairi, Fahmi [Auteur]

Laboratoire Génie Civil et géo-Environnement (LGCgE) - ULR 4515
Ding, Ning [Auteur]
Gloaguen, Jean-Michel [Auteur]

Unité Matériaux et Transformations (UMET) - UMR 8207
Nait-Abdelaziz, Moussa [Auteur]
Benguediab, Mohamed [Auteur]

Journal title :

Mechanics of materials . an international journal

Abbreviated title :

Mech. Mater.

Volume number :

148

Publication date :

2020-09-01

ISSN :

0167-6636

Keyword(s) :

Amorphous thermoplastics
Viscohyperelasticity
Viscoplasticity
Thermally-induced recovery

HAL domain(s) :

Sciences du Vivant [q-bio]

English abstract : [en]

In the present paper, we present an approach combining physically-based constitutive modeling and experiments to study the thermo-mechanical response of amorphous thermoplastics whose final objective is the prediction of ...
Show more >In the present paper, we present an approach combining physically-based constitutive modeling and experiments to study the thermo-mechanical response of amorphous thermoplastics whose final objective is the prediction of the thermally-induced strain recovery. The underlying thermo-mechanical mechanisms are described by elastoviscoplastic-viscohyperelastic constitutive relations allowing to account for the variation with temperature of the inter and intramolecular barriers to deformation and their abrupt change when the temperature traverses the glass transition. The model fit shows a good agreement with experimental observations on polycarbonate in terms of temperature and strain-rate dependent stress-strain response. The material kinetics with temperature is designed and introduced into the model to predict the thermally-activated strain recovery process during heating. In our approach, the intramolecular resistance of the entangled molecular chain network orientation/relaxation is used as the driving stress that continuously activates the strain recovery process during zero-stress creep above glass transition. The model predictions are shown under zero-stress creep recovery for different previous loading histories in terms of strain-rate and strain-level. The simulated results are in satisfactory agreement with experimental observations at different heating temperatures showing the relevance of the proposed approach.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

CNRS
ENSCL
IMT Lille Douai
INRA
Institut Catholique Lille
Univ. Artois
Université de Lille

Collections :

Unité Matériaux et Transformations (UMET) - UMR 8207

Research team(s) :

Ingénierie des Systèmes Polymères

Submission date :

2022-06-15T13:59:43Z
2023-12-19T16:32:09Z

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Version	Link	Modification date
2	20.500.12210/75179*	2023-12-19T16:30:20Z
1	20.500.12210/75179.1	2022-06-15T13:59:43Z

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