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Multi‐scale analysis of short glass fiber‐reinforced polypropylene under monotonic and fatigue loading

Article dans une revue avec comité de lecture
Author
IMADDAHEN, Mohamed A.
ccSHIRINBAYAN, Mohammadali
AYARI, Houssem
FOUCARD, Mathieu
ccTCHARKHTCHI, Abbas
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
ccFITOUSSI, Joseph

URI
http://hdl.handle.net/10985/19998
DOI
10.1002/pc.25740
Date
2020
Journal
Polymer Composites

Abstract

Short fiber-reinforced polypropylene is largely used in the automotive industry. Fatigue failure is one of the most failure modes observed in this class of materials. In order to better understand the damage mechanisms and plasticity evolution, this article provides an overall experimental investigation of the mechanical properties of a PPGF40 composite (polypropylene matrix reinforced by a 40% weight content of short glass fibers) including monotonic and cyclic loading. The effect of various parameters such as the loading direction, the strain rate, the temperature, and the fatigue are analyzed. The evolutions of the loss of stiffness and plastic strain during monotonic and fatigue tests are analyzed. Self-heating during cyclic loading is also studied. Moreover, the coupling effect of damage and plasticity is analyzed by plotting the evolution of the relative loss of stiffness vs the plastic strain increment for monotonic and cyclic loadings. For quasi-static loading, the results emphasize an intrinsic curve independent of the loading direction. Moreover, a sharp increase in the damage and plasticity levels due to the local effect occurring during cyclic loading is observed and correlated to SEM fracture surface analysis.

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