Plasticity and thermally-induced recovery in polycarbonate

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

Type de document :

Article dans une revue scientifique: Article original

DOI :

10.1016/j.mechmat.2020.103515

URL permanente :

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

Titre :

Plasticity and thermally-induced recovery in polycarbonate

Auteur(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]

Titre de la revue :

Mechanics of materials . an international journal

Nom court de la revue :

Mech. Mater.

Numéro :

148

Date de publication :

2020-09-01

ISSN :

0167-6636

Mot(s)-clé(s) :

Amorphous thermoplastics
Viscohyperelasticity
Viscoplasticity
Thermally-induced recovery

Discipline(s) HAL :

Sciences du Vivant [q-bio]

Résumé en anglais : [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 ...
Lire la suite >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.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

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

Collections :

Unité Matériaux et Transformations (UMET) - UMR 8207

Équipe(s) de recherche :

Ingénierie des Systèmes Polymères

Date de dépôt :

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

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Numéro de version	Lien	Date de modification
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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