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Christophe Baley - One of the best experts on this subject based on the ideXlab platform.

  • influence of the scattering of flax fibres properties on flax epoxy woven Ply Stiffness
    Materials & Design, 2017
    Co-Authors: Daniel Scida, Alain Bourmaud, Christophe Baley
    Abstract:

    Abstract The natural character of plant fibres was often cited as a disadvantage which results in the scattering of their properties. This work aims at studying the influence of this scattering on the Stiffness of an epoxy-flax fibres twill fabric Ply. Elastic coefficients were estimated using an analytical model in an elliptical configuration based on the use of the classical laminate theory. Most of flax fibre elastic coefficients were obtained in the literature; in addition, a flax fibre Poisson's ratio of 0.498 was estimated from an experimentally inverse approach. Then, the use of the analytical model evidenced that the Young's moduli of woven composite were strongly correlated to longitudinal and transversal fibre ones; moreover, the fibre transversal modulus had a significant impact on the Poisson's ratios of the composite. As regards to the yarn configuration and architecture, we showed that the mean twisting angle significantly affected Stiffness and Poisson's ratio of the composite; in the same way, the importance of waviness described by its waviness ratio was underlined whereas the scattering into yarn morphology had low influence on composite performances when the waviness ratio was high.

  • Influence of the scattering of flax fibres properties on flax/epoxy woven Ply Stiffness
    Materials and Design, 2017
    Co-Authors: Daniel Scida, Alain Bourmaud, Christophe Baley
    Abstract:

    The natural character of plant fibres was often cited as a disadvantage which results in the scattering of their properties. This work aims at studying the influence of this scattering on the Stiffness of an epoxy-flax fibres twill fabric Ply. Elastic coefficients were estimated using an analytical model in an elliptical configuration based on the use of the classical laminate theory. Most of flax fibre elastic coefficients were obtained in the literature; in addition, a flax fibre Poisson's ratio of 0.498 was estimated from an experimentally inverse approach. Then, the use of the analytical model evidenced that the Young's moduli of woven composite were strongly correlated to longitudinal and transversal fibre ones; moreover, the fibre transversal modulus had a significant impact on the Poisson's ratios of the composite. As regards to the yam configuration and architecture, we showed that the mean twisting angle significantly affected Stiffness and Poisson's ratio of the composite; in the same way, the importance of waviness described by its waviness ratio was underlined whereas the scattering into yam morphology had low influence on composite performances when the waviness ratio was high. (C) 2017 Elsevier Ltd. All rights reserved.

  • Influence of the scattering of flax fibres properties on flax/epoxy woven Ply Stiffness
    Materials & Design, 2017
    Co-Authors: Daniel Scida, Alain Bourmaud, Christophe Baley
    Abstract:

    Abstract The natural character of plant fibres was often cited as a disadvantage which results in the scattering of their properties. This work aims at studying the influence of this scattering on the Stiffness of an epoxy-flax fibres twill fabric Ply. Elastic coefficients were estimated using an analytical model in an elliptical configuration based on the use of the classical laminate theory. Most of flax fibre elastic coefficients were obtained in the literature; in addition, a flax fibre Poisson's ratio of 0.498 was estimated from an experimentally inverse approach. Then, the use of the analytical model evidenced that the Young's moduli of woven composite were strongly correlated to longitudinal and transversal fibre ones; moreover, the fibre transversal modulus had a significant impact on the Poisson's ratios of the composite. As regards to the yarn configuration and architecture, we showed that the mean twisting angle significantly affected Stiffness and Poisson's ratio of the composite; in the same way, the importance of waviness described by its waviness ratio was underlined whereas the scattering into yarn morphology had low influence on composite performances when the waviness ratio was high.

Daniel Scida - One of the best experts on this subject based on the ideXlab platform.

  • influence of the scattering of flax fibres properties on flax epoxy woven Ply Stiffness
    Materials & Design, 2017
    Co-Authors: Daniel Scida, Alain Bourmaud, Christophe Baley
    Abstract:

    Abstract The natural character of plant fibres was often cited as a disadvantage which results in the scattering of their properties. This work aims at studying the influence of this scattering on the Stiffness of an epoxy-flax fibres twill fabric Ply. Elastic coefficients were estimated using an analytical model in an elliptical configuration based on the use of the classical laminate theory. Most of flax fibre elastic coefficients were obtained in the literature; in addition, a flax fibre Poisson's ratio of 0.498 was estimated from an experimentally inverse approach. Then, the use of the analytical model evidenced that the Young's moduli of woven composite were strongly correlated to longitudinal and transversal fibre ones; moreover, the fibre transversal modulus had a significant impact on the Poisson's ratios of the composite. As regards to the yarn configuration and architecture, we showed that the mean twisting angle significantly affected Stiffness and Poisson's ratio of the composite; in the same way, the importance of waviness described by its waviness ratio was underlined whereas the scattering into yarn morphology had low influence on composite performances when the waviness ratio was high.

  • Influence of the scattering of flax fibres properties on flax/epoxy woven Ply Stiffness
    Materials and Design, 2017
    Co-Authors: Daniel Scida, Alain Bourmaud, Christophe Baley
    Abstract:

    The natural character of plant fibres was often cited as a disadvantage which results in the scattering of their properties. This work aims at studying the influence of this scattering on the Stiffness of an epoxy-flax fibres twill fabric Ply. Elastic coefficients were estimated using an analytical model in an elliptical configuration based on the use of the classical laminate theory. Most of flax fibre elastic coefficients were obtained in the literature; in addition, a flax fibre Poisson's ratio of 0.498 was estimated from an experimentally inverse approach. Then, the use of the analytical model evidenced that the Young's moduli of woven composite were strongly correlated to longitudinal and transversal fibre ones; moreover, the fibre transversal modulus had a significant impact on the Poisson's ratios of the composite. As regards to the yam configuration and architecture, we showed that the mean twisting angle significantly affected Stiffness and Poisson's ratio of the composite; in the same way, the importance of waviness described by its waviness ratio was underlined whereas the scattering into yam morphology had low influence on composite performances when the waviness ratio was high. (C) 2017 Elsevier Ltd. All rights reserved.

  • Influence of the scattering of flax fibres properties on flax/epoxy woven Ply Stiffness
    Materials & Design, 2017
    Co-Authors: Daniel Scida, Alain Bourmaud, Christophe Baley
    Abstract:

    Abstract The natural character of plant fibres was often cited as a disadvantage which results in the scattering of their properties. This work aims at studying the influence of this scattering on the Stiffness of an epoxy-flax fibres twill fabric Ply. Elastic coefficients were estimated using an analytical model in an elliptical configuration based on the use of the classical laminate theory. Most of flax fibre elastic coefficients were obtained in the literature; in addition, a flax fibre Poisson's ratio of 0.498 was estimated from an experimentally inverse approach. Then, the use of the analytical model evidenced that the Young's moduli of woven composite were strongly correlated to longitudinal and transversal fibre ones; moreover, the fibre transversal modulus had a significant impact on the Poisson's ratios of the composite. As regards to the yarn configuration and architecture, we showed that the mean twisting angle significantly affected Stiffness and Poisson's ratio of the composite; in the same way, the importance of waviness described by its waviness ratio was underlined whereas the scattering into yarn morphology had low influence on composite performances when the waviness ratio was high.

Alain Bourmaud - One of the best experts on this subject based on the ideXlab platform.

  • influence of the scattering of flax fibres properties on flax epoxy woven Ply Stiffness
    Materials & Design, 2017
    Co-Authors: Daniel Scida, Alain Bourmaud, Christophe Baley
    Abstract:

    Abstract The natural character of plant fibres was often cited as a disadvantage which results in the scattering of their properties. This work aims at studying the influence of this scattering on the Stiffness of an epoxy-flax fibres twill fabric Ply. Elastic coefficients were estimated using an analytical model in an elliptical configuration based on the use of the classical laminate theory. Most of flax fibre elastic coefficients were obtained in the literature; in addition, a flax fibre Poisson's ratio of 0.498 was estimated from an experimentally inverse approach. Then, the use of the analytical model evidenced that the Young's moduli of woven composite were strongly correlated to longitudinal and transversal fibre ones; moreover, the fibre transversal modulus had a significant impact on the Poisson's ratios of the composite. As regards to the yarn configuration and architecture, we showed that the mean twisting angle significantly affected Stiffness and Poisson's ratio of the composite; in the same way, the importance of waviness described by its waviness ratio was underlined whereas the scattering into yarn morphology had low influence on composite performances when the waviness ratio was high.

  • Influence of the scattering of flax fibres properties on flax/epoxy woven Ply Stiffness
    Materials and Design, 2017
    Co-Authors: Daniel Scida, Alain Bourmaud, Christophe Baley
    Abstract:

    The natural character of plant fibres was often cited as a disadvantage which results in the scattering of their properties. This work aims at studying the influence of this scattering on the Stiffness of an epoxy-flax fibres twill fabric Ply. Elastic coefficients were estimated using an analytical model in an elliptical configuration based on the use of the classical laminate theory. Most of flax fibre elastic coefficients were obtained in the literature; in addition, a flax fibre Poisson's ratio of 0.498 was estimated from an experimentally inverse approach. Then, the use of the analytical model evidenced that the Young's moduli of woven composite were strongly correlated to longitudinal and transversal fibre ones; moreover, the fibre transversal modulus had a significant impact on the Poisson's ratios of the composite. As regards to the yam configuration and architecture, we showed that the mean twisting angle significantly affected Stiffness and Poisson's ratio of the composite; in the same way, the importance of waviness described by its waviness ratio was underlined whereas the scattering into yam morphology had low influence on composite performances when the waviness ratio was high. (C) 2017 Elsevier Ltd. All rights reserved.

  • Influence of the scattering of flax fibres properties on flax/epoxy woven Ply Stiffness
    Materials & Design, 2017
    Co-Authors: Daniel Scida, Alain Bourmaud, Christophe Baley
    Abstract:

    Abstract The natural character of plant fibres was often cited as a disadvantage which results in the scattering of their properties. This work aims at studying the influence of this scattering on the Stiffness of an epoxy-flax fibres twill fabric Ply. Elastic coefficients were estimated using an analytical model in an elliptical configuration based on the use of the classical laminate theory. Most of flax fibre elastic coefficients were obtained in the literature; in addition, a flax fibre Poisson's ratio of 0.498 was estimated from an experimentally inverse approach. Then, the use of the analytical model evidenced that the Young's moduli of woven composite were strongly correlated to longitudinal and transversal fibre ones; moreover, the fibre transversal modulus had a significant impact on the Poisson's ratios of the composite. As regards to the yarn configuration and architecture, we showed that the mean twisting angle significantly affected Stiffness and Poisson's ratio of the composite; in the same way, the importance of waviness described by its waviness ratio was underlined whereas the scattering into yarn morphology had low influence on composite performances when the waviness ratio was high.

F. Pons - One of the best experts on this subject based on the ideXlab platform.

  • Computational micromechanics of the transverse and shear behavior of unidirectional fiber reinforced polymers including environmental effects
    Composites Part A: Applied Science and Manufacturing, 2017
    Co-Authors: F. Naya, Carlos González, Claudio S. Lopes, S. Van Der Veen, F. Pons
    Abstract:

    Abstract Qualification of Fiber Reinforced Polymer materials (FRP’s) for manufacturing of structural components in the aerospace industry is usually associated with extensive and costly experimental campaigns. The burden of testing is immense and materials should be characterized under different loading states (tension, compression, shear) and environmental conditions (temperature, humidity) to probe their structural integrity during service life. Recent developments in multiscale simulation, together with increased computational power and improvements in modeling tools, can be used to alleviate this scenario. In this work, high-fidelity simulations of the material behavior at the micro level are used to predict Ply properties and ascertain the effect of Ply constituents and microstructure on the homogenized Ply behavior. This approach relies on the numerical analysis of representative volume elements equipped with physical models of the Ply constituents. Its main feature is the ability to provide fast predictions of Ply Stiffness and strength properties for different environmental conditions of temperature and humidity, in agreement with the experimental results, showing the potential to reduce the time and costs required for material screening and characterization.

Olivier Allix - One of the best experts on this subject based on the ideXlab platform.

  • Modelling and identification of temperature-dependent mechanical behaviour of the elementary Ply in carbon/epoxy laminates
    Composites Science and Technology, 1996
    Co-Authors: Olivier Allix
    Abstract:

    Abstract This paper develops, at the elementary-Ply level, a model of the mechanical behaviour of continuous-fibre carbon/epoxy composite laminates subject to in-plane loads at temperatures in the range −120 to +120 °C. Attention is focused on the influence of temperature on the mechanical behaviour for load intensities extending to material failure. Damage mechanisms are introduced via meso-damage variables associated with the softening of Ply Stiffness. Inelastic strains are accounted for through a plasticity model coupled with damage. A careful analysis of the influence of temperature shows that experiments performed at three suitably chosen temperatures are sufficient to yield a precise identification of the single layer model within the full temperature range.

  • Damage modeling of composite laminates at various temperatures
    1994
    Co-Authors: Olivier Allix, Nadia Bahlouli, Lionnel Perret
    Abstract:

    In this paper the mechanical behavior of continuous fiber carbon-epoxy composite laminates submitted to in plane-loading at various temperatures is modelled at the elementary Ply scale. Damage mechanisms are introduced by means of meso-damage variables associated to reduction of Ply Stiffness. Inelastic strains are also taken into account as is their coupling with damage. Compared to previous studies, attention is focused on the effects of temperature on a -120°/+120° range. Experiments at three main temperatures have appeared to be sufficient to get a precise knowledge of the single layer mechanical behavior up to rupture. The model leads to implicit failure criteria, for the laminate submitted to complex loading at various temperatures, which includes the different damage mechanisms.