The Experts below are selected from a list of 15552 Experts worldwide ranked by ideXlab platform

Youcef Ouerdane - One of the best experts on this subject based on the ideXlab platform.

  • Dual-Fibre Bragg Grating Sensor for Simultaneous Temperature and Strain Sensing of Composite Materials Manufacturing
    2014
    Co-Authors: Emmanuel Marin, Youcef Ouerdane
    Abstract:

    The Optical Fibre Sensors (OFS)-based monitoring of a composite part during its manufacturing process is presented. The sensor is made of a dual grating, i.e. a standard FBG and a Long Period Grating (LPG) photo-written at the same location, which provides accurate temperature and strain measurements, as well as a good spatial resolution. By using the differences of sensitivities of each grating, this dual-sensor is able to discriminate and to determine accurately temperature and strain. The dual-sensor has been tested during the curing of a pure epoxy Resin, and a composite part obtained by Liquid Resin Infusion (LRI) process. Such dual-grating sensor is also very promising for SHM of composite parts.

  • Liquid Resin Infusion process monitoring with superimposed Fibre Bragg Grating sensor
    Polymer Testing, 2012
    Co-Authors: Emmanuel Marin, Laurent Robert, Sébastien Triollet, Youcef Ouerdane
    Abstract:

    This paper reports on the instrumentation and monitoring of a fibreglass/epoxy composite manufacturing process using an optical fibre sensor based on a Bragg grating. The sensor is made of superimposed Long Period Grating (LPG) and Fibre Bragg Grating (FBG), both written on the same fibre zone. This sensor gives very accurate results and good spatial resolution, due to its ability to discriminate intrinsically between thermal and kinematic effects. The sensor was initially tested during the curing of an epoxy Resin alone, in order to assess temperature and strain measurements. It is shown that these two factors can be well discriminated and quantified. The paper then presents results for monitoring Liquid Resin Infusion (LRI) , with the FBG/LPG sensor embedded in a composite part. Dielectric analysis was also performed. Results and analyses of the thermal cycle of curing and induced residual strains are discussed.

  • Liquid Resin Infusion process monitoring with embedded superimposed long period and short period Bragg grating sensor.
    EPJ Web of Conferences, 2010
    Co-Authors: Sébastien Triollet, Emmanuel Marin, Laurent Robert, Youcef Ouerdane
    Abstract:

    We propose here the monitoring of the Liquid Resin Infusion (LRI) process for using a superimposed long period (LPG) and short period (FBG) Bragg grating sensor. Monitoring of such a process is usually made measuring simultaneously temperature and strain by the use of an electro-optical device (FBG-Thermocouple). It has been shown that an applied solicitation is measured by a wavelength shift with a different sensitivity for LPG and FBG; thus strain and temperature influences can be determined separately by measuring corresponding wavelength shifts. The reported configuration is based on the use of these two Bragg gratings types written in the same fibre section, which allows us to discriminate the contributions of the temperature and strain. The sensor is embedded in a composite specimen manufactured by LRI process for monitoring in real time and simultaneously the applied temperature and strain.

  • Superimposed long period and short period Bragg grating sensor for LRI monitoring, 4p., 20th International Conference on Optical Fibre
    2009
    Co-Authors: Sébastien Triollet, Emmanuel Marin, Laurent Robert, Youcef Ouerdane
    Abstract:

    We report here an optical sensor based on fiber Bragg gratings to measure strain and temperature effects simultaneously. It has been shown that Long Period Grating (LPG) and Fiber Bragg Grating (FBG) exhibit different responses to an applied solicitation, thus strain and temperature influences can be determined separately by measuring the corresponding wavelength shifts. In this paper we present a configuration based on the use of these two grating types: a LPG and a FBG written in the same fiber section, which allows us to discriminate the contributions of these two main solicitations. The sensor is embedded in a composite specimen manufactured by Liquid Resin Infusion (LRI) process for monitoring purpose.

  • Superimposed long period and short period Bragg grating sensor for LRI monitoring
    2009
    Co-Authors: Sébastien Triollet, Emmanuel Marin, Laurent Robert, Youcef Ouerdane
    Abstract:

    We report here an optical sensor based on fiber Bragg gratings to measure strain and temperature effects simultaneously. It has been shown that Long Period Grating (LPG) and Fiber Bragg Grating (FBG) exhibit different responses to an applied solicitation, thus strain and temperature influences can be determined separately by measuring the corresponding wavelength shifts. In this paper we present a configuration based on the use of these two grating types: a LPG and a FBG written in the same fiber section, which allows us to discriminate the contributions of these two main solicitations. The sensor is embedded in a composite specimen manufactured by Liquid Resin Infusion (LRI) process for monitoring purpose.

Emmanuel Marin - One of the best experts on this subject based on the ideXlab platform.

  • Dual-Fibre Bragg Grating Sensor for Simultaneous Temperature and Strain Sensing of Composite Materials Manufacturing
    2014
    Co-Authors: Emmanuel Marin, Youcef Ouerdane
    Abstract:

    The Optical Fibre Sensors (OFS)-based monitoring of a composite part during its manufacturing process is presented. The sensor is made of a dual grating, i.e. a standard FBG and a Long Period Grating (LPG) photo-written at the same location, which provides accurate temperature and strain measurements, as well as a good spatial resolution. By using the differences of sensitivities of each grating, this dual-sensor is able to discriminate and to determine accurately temperature and strain. The dual-sensor has been tested during the curing of a pure epoxy Resin, and a composite part obtained by Liquid Resin Infusion (LRI) process. Such dual-grating sensor is also very promising for SHM of composite parts.

  • Liquid Resin Infusion process monitoring with superimposed Fibre Bragg Grating sensor
    Polymer Testing, 2012
    Co-Authors: Emmanuel Marin, Laurent Robert, Sébastien Triollet, Youcef Ouerdane
    Abstract:

    This paper reports on the instrumentation and monitoring of a fibreglass/epoxy composite manufacturing process using an optical fibre sensor based on a Bragg grating. The sensor is made of superimposed Long Period Grating (LPG) and Fibre Bragg Grating (FBG), both written on the same fibre zone. This sensor gives very accurate results and good spatial resolution, due to its ability to discriminate intrinsically between thermal and kinematic effects. The sensor was initially tested during the curing of an epoxy Resin alone, in order to assess temperature and strain measurements. It is shown that these two factors can be well discriminated and quantified. The paper then presents results for monitoring Liquid Resin Infusion (LRI) , with the FBG/LPG sensor embedded in a composite part. Dielectric analysis was also performed. Results and analyses of the thermal cycle of curing and induced residual strains are discussed.

  • Liquid Resin Infusion process monitoring with embedded superimposed long period and short period Bragg grating sensor.
    EPJ Web of Conferences, 2010
    Co-Authors: Sébastien Triollet, Emmanuel Marin, Laurent Robert, Youcef Ouerdane
    Abstract:

    We propose here the monitoring of the Liquid Resin Infusion (LRI) process for using a superimposed long period (LPG) and short period (FBG) Bragg grating sensor. Monitoring of such a process is usually made measuring simultaneously temperature and strain by the use of an electro-optical device (FBG-Thermocouple). It has been shown that an applied solicitation is measured by a wavelength shift with a different sensitivity for LPG and FBG; thus strain and temperature influences can be determined separately by measuring corresponding wavelength shifts. The reported configuration is based on the use of these two Bragg gratings types written in the same fibre section, which allows us to discriminate the contributions of the temperature and strain. The sensor is embedded in a composite specimen manufactured by LRI process for monitoring in real time and simultaneously the applied temperature and strain.

  • Superimposed long period and short period Bragg grating sensor for LRI monitoring, 4p., 20th International Conference on Optical Fibre
    2009
    Co-Authors: Sébastien Triollet, Emmanuel Marin, Laurent Robert, Youcef Ouerdane
    Abstract:

    We report here an optical sensor based on fiber Bragg gratings to measure strain and temperature effects simultaneously. It has been shown that Long Period Grating (LPG) and Fiber Bragg Grating (FBG) exhibit different responses to an applied solicitation, thus strain and temperature influences can be determined separately by measuring the corresponding wavelength shifts. In this paper we present a configuration based on the use of these two grating types: a LPG and a FBG written in the same fiber section, which allows us to discriminate the contributions of these two main solicitations. The sensor is embedded in a composite specimen manufactured by Liquid Resin Infusion (LRI) process for monitoring purpose.

  • Superimposed long period and short period Bragg grating sensor for LRI monitoring
    2009
    Co-Authors: Sébastien Triollet, Emmanuel Marin, Laurent Robert, Youcef Ouerdane
    Abstract:

    We report here an optical sensor based on fiber Bragg gratings to measure strain and temperature effects simultaneously. It has been shown that Long Period Grating (LPG) and Fiber Bragg Grating (FBG) exhibit different responses to an applied solicitation, thus strain and temperature influences can be determined separately by measuring the corresponding wavelength shifts. In this paper we present a configuration based on the use of these two grating types: a LPG and a FBG written in the same fiber section, which allows us to discriminate the contributions of these two main solicitations. The sensor is embedded in a composite specimen manufactured by Liquid Resin Infusion (LRI) process for monitoring purpose.

Sébastien Triollet - One of the best experts on this subject based on the ideXlab platform.

  • Liquid Resin Infusion process monitoring with superimposed Fibre Bragg Grating sensor
    Polymer Testing, 2012
    Co-Authors: Emmanuel Marin, Laurent Robert, Sébastien Triollet, Youcef Ouerdane
    Abstract:

    This paper reports on the instrumentation and monitoring of a fibreglass/epoxy composite manufacturing process using an optical fibre sensor based on a Bragg grating. The sensor is made of superimposed Long Period Grating (LPG) and Fibre Bragg Grating (FBG), both written on the same fibre zone. This sensor gives very accurate results and good spatial resolution, due to its ability to discriminate intrinsically between thermal and kinematic effects. The sensor was initially tested during the curing of an epoxy Resin alone, in order to assess temperature and strain measurements. It is shown that these two factors can be well discriminated and quantified. The paper then presents results for monitoring Liquid Resin Infusion (LRI) , with the FBG/LPG sensor embedded in a composite part. Dielectric analysis was also performed. Results and analyses of the thermal cycle of curing and induced residual strains are discussed.

  • Liquid Resin Infusion process monitoring with embedded superimposed long period and short period Bragg grating sensor.
    EPJ Web of Conferences, 2010
    Co-Authors: Sébastien Triollet, Emmanuel Marin, Laurent Robert, Youcef Ouerdane
    Abstract:

    We propose here the monitoring of the Liquid Resin Infusion (LRI) process for using a superimposed long period (LPG) and short period (FBG) Bragg grating sensor. Monitoring of such a process is usually made measuring simultaneously temperature and strain by the use of an electro-optical device (FBG-Thermocouple). It has been shown that an applied solicitation is measured by a wavelength shift with a different sensitivity for LPG and FBG; thus strain and temperature influences can be determined separately by measuring corresponding wavelength shifts. The reported configuration is based on the use of these two Bragg gratings types written in the same fibre section, which allows us to discriminate the contributions of the temperature and strain. The sensor is embedded in a composite specimen manufactured by LRI process for monitoring in real time and simultaneously the applied temperature and strain.

  • Superimposed long period and short period Bragg grating sensor for LRI monitoring, 4p., 20th International Conference on Optical Fibre
    2009
    Co-Authors: Sébastien Triollet, Emmanuel Marin, Laurent Robert, Youcef Ouerdane
    Abstract:

    We report here an optical sensor based on fiber Bragg gratings to measure strain and temperature effects simultaneously. It has been shown that Long Period Grating (LPG) and Fiber Bragg Grating (FBG) exhibit different responses to an applied solicitation, thus strain and temperature influences can be determined separately by measuring the corresponding wavelength shifts. In this paper we present a configuration based on the use of these two grating types: a LPG and a FBG written in the same fiber section, which allows us to discriminate the contributions of these two main solicitations. The sensor is embedded in a composite specimen manufactured by Liquid Resin Infusion (LRI) process for monitoring purpose.

  • Superimposed long period and short period Bragg grating sensor for LRI monitoring
    2009
    Co-Authors: Sébastien Triollet, Emmanuel Marin, Laurent Robert, Youcef Ouerdane
    Abstract:

    We report here an optical sensor based on fiber Bragg gratings to measure strain and temperature effects simultaneously. It has been shown that Long Period Grating (LPG) and Fiber Bragg Grating (FBG) exhibit different responses to an applied solicitation, thus strain and temperature influences can be determined separately by measuring the corresponding wavelength shifts. In this paper we present a configuration based on the use of these two grating types: a LPG and a FBG written in the same fiber section, which allows us to discriminate the contributions of these two main solicitations. The sensor is embedded in a composite specimen manufactured by Liquid Resin Infusion (LRI) process for monitoring purpose.

Laurent Robert - One of the best experts on this subject based on the ideXlab platform.

  • Liquid Resin Infusion process monitoring with superimposed Fibre Bragg Grating sensor
    Polymer Testing, 2012
    Co-Authors: Emmanuel Marin, Laurent Robert, Sébastien Triollet, Youcef Ouerdane
    Abstract:

    This paper reports on the instrumentation and monitoring of a fibreglass/epoxy composite manufacturing process using an optical fibre sensor based on a Bragg grating. The sensor is made of superimposed Long Period Grating (LPG) and Fibre Bragg Grating (FBG), both written on the same fibre zone. This sensor gives very accurate results and good spatial resolution, due to its ability to discriminate intrinsically between thermal and kinematic effects. The sensor was initially tested during the curing of an epoxy Resin alone, in order to assess temperature and strain measurements. It is shown that these two factors can be well discriminated and quantified. The paper then presents results for monitoring Liquid Resin Infusion (LRI) , with the FBG/LPG sensor embedded in a composite part. Dielectric analysis was also performed. Results and analyses of the thermal cycle of curing and induced residual strains are discussed.

  • Liquid Resin Infusion process monitoring with embedded superimposed long period and short period Bragg grating sensor.
    EPJ Web of Conferences, 2010
    Co-Authors: Sébastien Triollet, Emmanuel Marin, Laurent Robert, Youcef Ouerdane
    Abstract:

    We propose here the monitoring of the Liquid Resin Infusion (LRI) process for using a superimposed long period (LPG) and short period (FBG) Bragg grating sensor. Monitoring of such a process is usually made measuring simultaneously temperature and strain by the use of an electro-optical device (FBG-Thermocouple). It has been shown that an applied solicitation is measured by a wavelength shift with a different sensitivity for LPG and FBG; thus strain and temperature influences can be determined separately by measuring corresponding wavelength shifts. The reported configuration is based on the use of these two Bragg gratings types written in the same fibre section, which allows us to discriminate the contributions of the temperature and strain. The sensor is embedded in a composite specimen manufactured by LRI process for monitoring in real time and simultaneously the applied temperature and strain.

  • Superimposed long period and short period Bragg grating sensor for LRI monitoring, 4p., 20th International Conference on Optical Fibre
    2009
    Co-Authors: Sébastien Triollet, Emmanuel Marin, Laurent Robert, Youcef Ouerdane
    Abstract:

    We report here an optical sensor based on fiber Bragg gratings to measure strain and temperature effects simultaneously. It has been shown that Long Period Grating (LPG) and Fiber Bragg Grating (FBG) exhibit different responses to an applied solicitation, thus strain and temperature influences can be determined separately by measuring the corresponding wavelength shifts. In this paper we present a configuration based on the use of these two grating types: a LPG and a FBG written in the same fiber section, which allows us to discriminate the contributions of these two main solicitations. The sensor is embedded in a composite specimen manufactured by Liquid Resin Infusion (LRI) process for monitoring purpose.

  • Superimposed long period and short period Bragg grating sensor for LRI monitoring
    2009
    Co-Authors: Sébastien Triollet, Emmanuel Marin, Laurent Robert, Youcef Ouerdane
    Abstract:

    We report here an optical sensor based on fiber Bragg gratings to measure strain and temperature effects simultaneously. It has been shown that Long Period Grating (LPG) and Fiber Bragg Grating (FBG) exhibit different responses to an applied solicitation, thus strain and temperature influences can be determined separately by measuring the corresponding wavelength shifts. In this paper we present a configuration based on the use of these two grating types: a LPG and a FBG written in the same fiber section, which allows us to discriminate the contributions of these two main solicitations. The sensor is embedded in a composite specimen manufactured by Liquid Resin Infusion (LRI) process for monitoring purpose.

Jean-christophe Minni - One of the best experts on this subject based on the ideXlab platform.

  • Monitoring the Resin infusion manufacturing process under industrial environment using distributed sensors
    Journal of Composite Materials, 2012
    Co-Authors: Peng Wang, Jérôme Molimard, Sylvain Drapier, Alain Vautrin, Jean-christophe Minni
    Abstract:

    A novel direct approach to detect the Resin flow front during the Liquid Resin Infusion process under industrial environment is proposed. To detect the Resin front accurately and verify the results, which are deduced from indirect micro-thermocouples measurements, optical fiber sensors based on Fresnel reflection are utilized. It is expected that the results derived from both techniques will lead to an improvement of our understanding of the Resin flow and in particular prove that micro-thermocouples can be used as sensors as routine technique under our experimental conditions. Moreover, comparisons with numerical simulations are carried out and experimental and simulated mold filling times are successfully compared.

  • Characterization of Liquid Resin Infusion (LRI) filling by fringe pattern projection and in situ thermocouples
    Composites Part A: Applied Science and Manufacturing, 2010
    Co-Authors: Peng Wang, Jérôme Molimard, Sylvain Drapier, Alain Vautrin, Jean-christophe Minni
    Abstract:

    Prepregs are not alone suited to the manufacturing of new types of aircraft structural parts that tend to be thicker and have more complex shapes. Direct processes called Liquid Composites Moulding (LCM), like Resin Transfer Moulding (RTM) or Resin Infusion Process (LRI: Liquid Resin Infusion, RFI: Resin Film Infusion) are now available. Particular attention is paid here to LRI process that looks very promising. In order to optimize both the design and manufacturing parameters in LRI processes, a general model to analyze the isothermal fluid flow through highly compressible porous media such as fibrous preforms has been recently proposed [1], [2] and [3]. To validate the model and to improve the knowledge of the LRI process, an experimental approach is proposed. Two different measurement techniques, micro-thermocouple sensors and fringe projection technique, have been used to characterize the process. It appears that results derived from both techniques are in agreement and support the assumption that the Resin flow occurs mainly transversely to the preform plane.