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MULTI-PHYSICS APPROACHES FOR THE BEHAVIOR OF POLYMER-BASED MATERIALS

Mechanical Behavior of Recycled Polypropylene Composites Under Tensile, Bending, and Creep Loading: Experimental and Modeling

[+] Author and Article Information
Cécile Rogueda-Berriet

 Department of Applied Mechanics, Université de Franche-Comté, FEMTO-ST Institute, 24 rue de l’Epitaphe, 25000 Besançon, France e-mail: cecile.berriet@univ-fcomte.fr

Nadia Bahlouli

 Université de Strasbourg, Institut de Mécanique des Fluides et des Solides/CNRS, 2 rue Boussingault, 67000 Strasbourg, Francenadia.bahlouli@unistra.fr

Daniel Pessey, Yves Rémond

 Université de Strasbourg, Institut de Mécanique des Fluides et des Solides/CNRS, 2 rue Boussingault, 67000 Strasbourg, France

J. Eng. Mater. Technol 133(3), 030907 (Jul 18, 2011) (7 pages) doi:10.1115/1.4004051 History: Received May 18, 2010; Revised April 02, 2011; Published July 18, 2011; Online July 18, 2011

By the 2000/53/CE directive, the European Union leads to develop the recycling process industry, specially the plastic one, for end of life vehicles (ELV). To value these recycled materials by an isofunction use, as for example for car semistructure elements, it is necessary for the mechanical properties to be better known. In this study, the effects of the recycling process on the mechanical behavior of polypropylene (PP)/elastomeric, talc particles filled or not, are presented, through different loading tests: tensile (small and finite strain), bending and creep tests. The failure, plasticity, and elasticity parameters modifications are established. Tensile and bending tests lead to some similar characteristics evolution as, for example elastic modulus values. The creep behavior evolution is more complex to understand. Both materials have a near finite strain macroscopic behavior so that, taking account of each component (talc, EPDM or EPR elastomeric part) the intrinsic behavior can be well described in the mechanical model finally presented.

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Copyright © 2011 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Recycling effect on the true stress-strain curves of tensile tests under different strain rates (ɛ·=0.0017,0.017,and0.17s-1) for the 108MF97 material

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Figure 2

Recycling effect on the true stress-strain curves of tensile tests under different strain rates (ɛ·=0.0017,0.017,and0.17s-1) for the 7510 material

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Figure 3

Recycling and strain rate effects on the force-deflection curves for the 108MF97 under bending tests at different deflection rates (0.2 and 2 mm s−1 )

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Figure 4

Recycling and strain rate effects on the force-deflection curves for the 7510 under bending tests at different deflection rates (0.2 and 2 mm s−1 )

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Figure 5

Creep test under 4 MPa: compliance-time curves

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Figure 6

Creep test under 4 MPa: strain-time curves with unloading

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Figure 7

Effect of strain rate and recycling on elastic modulus of the 7510

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Figure 8

Effect of strain rate and recycling on elastic modulus of the 108MF97

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Figure 9

Effect of strain rate and recycling on yield stress of the 7510

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Figure 10

Effect of strain rate and recycling on yield stress of the 108MF97

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Figure 11

Comparison between modeling and experimental data of the 108MF97 and its recycled derivatives under uni-axial tensile test at various strain rates; (a) 108MF97 OP, (b) 108MF97 6P, and (c) 108MF97 12P

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Figure 12

Comparison between modelling and experimental data of the 7510 and its recycled derivatives under uni-axial tensile test at various strain rates; (a) 7510 OP, (b) 7510 6P, and (c) 7510 12P

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Figure 13

The visco-elasto-plastic model: Maxwell set and three Kelvin–Voigt sets

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Figure 14

Comparison between modelling and experimental data for creep tests

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