Constitutive Modeling of the Tensile Behavior of Recycled Polypropylene-Based Composites

The effect of reprocessing on the quasi-static uniaxial tensile behavior of two commercial polypropylene (PP)-based composites is experimentally investigated and modeled. In particular, the studied materials consist of an unfilled high-impact PP and a talc-filled high-impact PP. These PP composites...

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Main Authors: Kui Wang, Yong Peng, Rodrigue Matadi Boumbimba, Nadia Bahlouli, Daniel Pessey, Said Ahzi, Frédéric Addiego, Yves Rémond
Format: Article
Language:English
Published: MDPI AG 2019-07-01
Series:Materials
Subjects:
Online Access:https://www.mdpi.com/1996-1944/12/15/2419
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spelling doaj-6fd5964107ff41ef9c7837087725732e2020-11-25T02:45:27ZengMDPI AGMaterials1996-19442019-07-011215241910.3390/ma12152419ma12152419Constitutive Modeling of the Tensile Behavior of Recycled Polypropylene-Based CompositesKui Wang0Yong Peng1Rodrigue Matadi Boumbimba2Nadia Bahlouli3Daniel Pessey4Said Ahzi5Frédéric Addiego6Yves Rémond7Key Laboratory of Traffic Safety on Track (Central South University) Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha 410075, ChinaKey Laboratory of Traffic Safety on Track (Central South University) Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha 410075, ChinaArts et Métiers ParisTech, LEM3, Université de Lorraine, CNRS, F-57000 Metz, FranceICUBE Laboratory—CNRS, University of Strasbourg, 67000 Strasbourg, FranceICUBE Laboratory—CNRS, University of Strasbourg, 67000 Strasbourg, FranceICUBE Laboratory—CNRS, University of Strasbourg, 67000 Strasbourg, FranceDepartment Materials Research and Technology (MRT), Luxembourg Institute of Science and Technology (LIST), ZAE Robert Steichen, 5 Rue Bommel, L‐4940 Hautcharage, LuxembourgICUBE Laboratory—CNRS, University of Strasbourg, 67000 Strasbourg, FranceThe effect of reprocessing on the quasi-static uniaxial tensile behavior of two commercial polypropylene (PP)-based composites is experimentally investigated and modeled. In particular, the studied materials consist of an unfilled high-impact PP and a talc-filled high-impact PP. These PP composites are subjected to repeated processing cycles, including a grinding step and an extrusion step to simulate recycling at the laboratory level, the selected reprocessing numbers for this study being 0, 3, 6, 9, and 12. Because the repeated reprocessing leads to thermo-mechanical degradation by chain scission mechanisms, the tensile behavior of the two materials exhibits a continuous decrease of elastic modulus and failure strain with the increasing amount of reprocessing. A physically consistent three-dimensional constitutive model is used to predict the tensile response of non-recycled materials with strain rate dependence. For the recycled materials, the reprocessing effect is accounted by incorporating the reprocessing sensitive coefficient into the constitutive model for Young’s modulus, failure strain, softening, and hardening equations. Our predictions of true stress—true strain curves for non-recycled and recycled 108MF97 and 7510—are in good agreement with experimental data and can be useful for industries and companies which are looking for a model able to predict the recycling effect on mechanical behavior of polymer-based materials.https://www.mdpi.com/1996-1944/12/15/2419polypropylenecompositeconstitutive modelreprocessingmechanical propertiesstrain rate
collection DOAJ
language English
format Article
sources DOAJ
author Kui Wang
Yong Peng
Rodrigue Matadi Boumbimba
Nadia Bahlouli
Daniel Pessey
Said Ahzi
Frédéric Addiego
Yves Rémond
spellingShingle Kui Wang
Yong Peng
Rodrigue Matadi Boumbimba
Nadia Bahlouli
Daniel Pessey
Said Ahzi
Frédéric Addiego
Yves Rémond
Constitutive Modeling of the Tensile Behavior of Recycled Polypropylene-Based Composites
Materials
polypropylene
composite
constitutive model
reprocessing
mechanical properties
strain rate
author_facet Kui Wang
Yong Peng
Rodrigue Matadi Boumbimba
Nadia Bahlouli
Daniel Pessey
Said Ahzi
Frédéric Addiego
Yves Rémond
author_sort Kui Wang
title Constitutive Modeling of the Tensile Behavior of Recycled Polypropylene-Based Composites
title_short Constitutive Modeling of the Tensile Behavior of Recycled Polypropylene-Based Composites
title_full Constitutive Modeling of the Tensile Behavior of Recycled Polypropylene-Based Composites
title_fullStr Constitutive Modeling of the Tensile Behavior of Recycled Polypropylene-Based Composites
title_full_unstemmed Constitutive Modeling of the Tensile Behavior of Recycled Polypropylene-Based Composites
title_sort constitutive modeling of the tensile behavior of recycled polypropylene-based composites
publisher MDPI AG
series Materials
issn 1996-1944
publishDate 2019-07-01
description The effect of reprocessing on the quasi-static uniaxial tensile behavior of two commercial polypropylene (PP)-based composites is experimentally investigated and modeled. In particular, the studied materials consist of an unfilled high-impact PP and a talc-filled high-impact PP. These PP composites are subjected to repeated processing cycles, including a grinding step and an extrusion step to simulate recycling at the laboratory level, the selected reprocessing numbers for this study being 0, 3, 6, 9, and 12. Because the repeated reprocessing leads to thermo-mechanical degradation by chain scission mechanisms, the tensile behavior of the two materials exhibits a continuous decrease of elastic modulus and failure strain with the increasing amount of reprocessing. A physically consistent three-dimensional constitutive model is used to predict the tensile response of non-recycled materials with strain rate dependence. For the recycled materials, the reprocessing effect is accounted by incorporating the reprocessing sensitive coefficient into the constitutive model for Young’s modulus, failure strain, softening, and hardening equations. Our predictions of true stress—true strain curves for non-recycled and recycled 108MF97 and 7510—are in good agreement with experimental data and can be useful for industries and companies which are looking for a model able to predict the recycling effect on mechanical behavior of polymer-based materials.
topic polypropylene
composite
constitutive model
reprocessing
mechanical properties
strain rate
url https://www.mdpi.com/1996-1944/12/15/2419
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