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Fracture mechanics of hybrid composites with ductile matrix and brittle fibers: Influence of temperature and constraint effect

Vieille, Benoit and Pujols Gonzalez, Juan-Daniel and Bouvet, Christophe Fracture mechanics of hybrid composites with ductile matrix and brittle fibers: Influence of temperature and constraint effect. (2019) Journal of Composite Materials, 53 (10). 1361-1376. ISSN 0021-9983

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Official URL: https://doi.org/10.1177/0021998318802613


The fracture behavior of hybrid carbon and glass fiber woven-ply reinforced polyether ether ketone thermoplastic quasiisotropic laminates is investigated. Single-edge-notch bending and single-edge-notch tensile tests were conducted at room temperature and at a temperature higher than the glass transition temperature (Tg) to study the influence of both the constraint effect and the temperature on the strain energy release rate in laminates with ductile polyether ether ketone matrix and brittle fibers. As failure is primarily driven by fibers breakage in tension (single-edge-notch tensile test) and in tension/compression (single-edge-notch bending), it turns out that a temperature increase has very little influence on the mode I critical translaminar fracture toughness KIc though the ductility of polyether ether ketone matrix is exacerbated at T>Tg. It also appears that the constraint effect has very little influence on KIc as single-edge-notch tensile test and single-edge-notch bending specimens have virtually the same mean value (about 45MPa. m−−√). Single-edge-notch bending specimens being characterized by a gradual failure, the G-R curves were derived from the computation of the compliance loss and the corresponding gradual crack growth in agreement with the ASTM standard E1820. From the evolution of the G-R curves at high temperature, the highly ductile behavior of the polyether ether ketone matrix at T>Tg provides a good intrinsic toughness to the material, and the bridging of translaminar crack by the glass fibers at the outer surfaces of laminates contribute to a moderate increase in its extrinsic toughness.

Item Type:Article
HAL Id:hal-02006406
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Ecole nationale supérieure des Mines d'Albi-Carmaux - IMT Mines Albi (FRANCE)
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA (FRANCE)
Other partners > Institut National des Sciences Appliquées de Rouen - INSA (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Normandie Université (FRANCE)
Laboratory name:
Deposited On:04 Feb 2019 13:41

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