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In situ X-ray tomography investigation on damage mechanisms in short glass fibre reinforced thermoplastics: Effects of fibre orientation and relative humidity

Article dans une revue avec comité de lecture
Auteur
ROLLAND, Héloise
ccSAINTIER, Nicolas
WILSON, Pablo
133641 Technocentre Renault [Guyancourt]
MERZEAU, Jonathan
ROBERT, Gilles
471759 Solvay Engineering Plastics

URI
http://hdl.handle.net/10985/17326
DOI
10.1016/j.compositesb.2016.10.043
Date
2017
Journal
Composites Part B: Engineering

Résumé

Damage mechanisms of reinforced polyamide 6,6 have been studied in 3D through in situ X-ray tomography tensile tests. 3D pictures of the microstructure have been taken during tensile tests to catch damage evolution in the bulk of material. The effects of relative humidity and orientation sampling are particularly investigated in this paper. Main mechanisms have been identified such as fibre failure, debonding, damage at fibre ends and matrix damage (cavitation, fibrillation, damage growth). Qualitative observations reveal that the mechanisms are very sensitive to orientation sampling and relative humidity of the specimen. A specific procedure was developed to propose a quantitative analysis of the results. This analysis shows that identified mechanisms not only have different proportions but also have different kinetics according to relative humidity and orientation sampling of the specimen.

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Nom:
I2M_2017_CPBE_SAINTIER.pdf
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8.873Mo
Format:
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  • Institut de Mécanique et d’Ingénierie de Bordeaux (I2M)

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  • Fatigue damage mechanisms of short fiber reinforced PA66 as observed by in-situ synchrotron X-ray microtomography 
    Article dans une revue avec comité de lecture
    ROLLAND, Héloise; ccSAINTIER, Nicolas; RAPHAEL, Ilan; LENOIR, Nicolas; KING, Andrew; ROBERT, Gilles (Elsevier, 2018)
    The understanding of fatigue damage mechanisms of short fiber reinforced thermoplastics are a key issue in order to optimize material processing and propose physically based multiscale fatigue damage models. The presented ...
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    Article dans une revue avec comité de lecture
    ROLLAND, Héloise; ccSAINTIER, Nicolas; ROBERT, Gilles (Elsevier, 2016)
    Micromechanical modelling of short fibre reinforced thermoplastics requires identification of damage mechanisms and their kinetics as a function of their microstructure. A compact tensile machine has been designed to observe ...
  • A mixed strain rate and energy based fatigue criterion for short fiber reinforced thermoplastics 
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    RAPHAEL, Ilan; ccSAINTIER, Nicolas; ROLLAND, Heloise; ROBERT, Gilles; LAIARINANDRASANA, Lucien (Elsevier, 2019)
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    Cast aluminium alloys, and more widely cast materials, are frequently used in industry. The casting process allows for complex geometries of parts, but, on the downside, often causes materials voids. It is well known these ...

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