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Fabien Nony - One of the best experts on this subject based on the ideXlab platform.

  • a probabilistic damage behavior law for composite material dedicated to composite pressure Vessel
    International Journal of Hydrogen Energy, 2015
    Co-Authors: Stephane Villalonga, Fabien Nony, H Galiano
    Abstract:

    Abstract This paper written in the framework of OSIRHYS IV project which aim is to clarify uncertainties and approximations of high pressure Vessel composite design and calculation. The project, headed by CEA, mainly consists in the comparison between experimental results on type IV hydrogen high pressure Storage Vessel and numerical results. This paper presents a composite damage behavior law whose specificity is to take into account the variability of some material parameters. A model of wound notched structures is realized and compared with experimental results in order to verify the capability of this law to model the behavior of the composite used in OSIRHYS IV type IV hydrogen Storage Vessel.

  • modeling parameters identification and experimental validation of composite materials behavior law used in 700 bar type iv hydrogen high pressure Storage Vessel
    International Journal of Hydrogen Energy, 2015
    Co-Authors: Stephane Villalonga, Fabien Nony, H Galiano
    Abstract:

    Abstract This paper is written in the framework of the OSIRHYS IV project lead by CEA which aims to validate numerical model for type IV hydrogen high pressure Storage Vessel and to quantify uncertainties. A thermo-mechanical behavior law for composite used for the simulation of tank burst behavior is presented in this study. This behavior law takes into account several physical phenomena such as fiber breakage, matrix cracking, plasticity and delamination. Identification on wound carbon-epoxy samples and validation on wound carbon-epoxy semi-structures experimental tests are also presented in this paper. Finally, the identified material law is applied to a 2D-axi-symmetric finite elements model of the tank at three different temperatures, to analyze thermal effect on burst behavior.

  • 700 bar type iv high pressure hydrogen Storage Vessel burst simulation and experimental validation
    International Journal of Hydrogen Energy, 2015
    Co-Authors: Juan Pedro Berro Ramirez, Stephane Villalonga, Damie Halm, Jeanclaude Grandidie, Fabien Nony
    Abstract:

    Abstract The damage model described in [12] is used to predict the burst pressure and the burst mode of type IV hyperbaric tanks for hydrogen Storage. The shape of the composite shell (as well as the fibre orientation at each point) ensuring the mechanical strength comes from the plug-in Wound Composite Modeler. The FE simulations are found not only to predict the global behaviour of the Vessel (radial and axial displacement when undergoing an increasing inner pressure, burst pressure value), but also the damage modes at the ply scale. Thus, they are capable of explaining phenomena such as the non linearity due to the presence of a gap between the liner and the composite shell or the possible leaks due to delamination in the dome and providing the strain level in each composite layer.

Stephane Villalonga - One of the best experts on this subject based on the ideXlab platform.

  • a probabilistic damage behavior law for composite material dedicated to composite pressure Vessel
    International Journal of Hydrogen Energy, 2015
    Co-Authors: Stephane Villalonga, Fabien Nony, H Galiano
    Abstract:

    Abstract This paper written in the framework of OSIRHYS IV project which aim is to clarify uncertainties and approximations of high pressure Vessel composite design and calculation. The project, headed by CEA, mainly consists in the comparison between experimental results on type IV hydrogen high pressure Storage Vessel and numerical results. This paper presents a composite damage behavior law whose specificity is to take into account the variability of some material parameters. A model of wound notched structures is realized and compared with experimental results in order to verify the capability of this law to model the behavior of the composite used in OSIRHYS IV type IV hydrogen Storage Vessel.

  • modeling parameters identification and experimental validation of composite materials behavior law used in 700 bar type iv hydrogen high pressure Storage Vessel
    International Journal of Hydrogen Energy, 2015
    Co-Authors: Stephane Villalonga, Fabien Nony, H Galiano
    Abstract:

    Abstract This paper is written in the framework of the OSIRHYS IV project lead by CEA which aims to validate numerical model for type IV hydrogen high pressure Storage Vessel and to quantify uncertainties. A thermo-mechanical behavior law for composite used for the simulation of tank burst behavior is presented in this study. This behavior law takes into account several physical phenomena such as fiber breakage, matrix cracking, plasticity and delamination. Identification on wound carbon-epoxy samples and validation on wound carbon-epoxy semi-structures experimental tests are also presented in this paper. Finally, the identified material law is applied to a 2D-axi-symmetric finite elements model of the tank at three different temperatures, to analyze thermal effect on burst behavior.

  • 700 bar type iv high pressure hydrogen Storage Vessel burst simulation and experimental validation
    International Journal of Hydrogen Energy, 2015
    Co-Authors: Juan Pedro Berro Ramirez, Stephane Villalonga, Damie Halm, Jeanclaude Grandidie, Fabien Nony
    Abstract:

    Abstract The damage model described in [12] is used to predict the burst pressure and the burst mode of type IV hyperbaric tanks for hydrogen Storage. The shape of the composite shell (as well as the fibre orientation at each point) ensuring the mechanical strength comes from the plug-in Wound Composite Modeler. The FE simulations are found not only to predict the global behaviour of the Vessel (radial and axial displacement when undergoing an increasing inner pressure, burst pressure value), but also the damage modes at the ply scale. Thus, they are capable of explaining phenomena such as the non linearity due to the presence of a gap between the liner and the composite shell or the possible leaks due to delamination in the dome and providing the strain level in each composite layer.

H Galiano - One of the best experts on this subject based on the ideXlab platform.

  • a probabilistic damage behavior law for composite material dedicated to composite pressure Vessel
    International Journal of Hydrogen Energy, 2015
    Co-Authors: Stephane Villalonga, Fabien Nony, H Galiano
    Abstract:

    Abstract This paper written in the framework of OSIRHYS IV project which aim is to clarify uncertainties and approximations of high pressure Vessel composite design and calculation. The project, headed by CEA, mainly consists in the comparison between experimental results on type IV hydrogen high pressure Storage Vessel and numerical results. This paper presents a composite damage behavior law whose specificity is to take into account the variability of some material parameters. A model of wound notched structures is realized and compared with experimental results in order to verify the capability of this law to model the behavior of the composite used in OSIRHYS IV type IV hydrogen Storage Vessel.

  • modeling parameters identification and experimental validation of composite materials behavior law used in 700 bar type iv hydrogen high pressure Storage Vessel
    International Journal of Hydrogen Energy, 2015
    Co-Authors: Stephane Villalonga, Fabien Nony, H Galiano
    Abstract:

    Abstract This paper is written in the framework of the OSIRHYS IV project lead by CEA which aims to validate numerical model for type IV hydrogen high pressure Storage Vessel and to quantify uncertainties. A thermo-mechanical behavior law for composite used for the simulation of tank burst behavior is presented in this study. This behavior law takes into account several physical phenomena such as fiber breakage, matrix cracking, plasticity and delamination. Identification on wound carbon-epoxy samples and validation on wound carbon-epoxy semi-structures experimental tests are also presented in this paper. Finally, the identified material law is applied to a 2D-axi-symmetric finite elements model of the tank at three different temperatures, to analyze thermal effect on burst behavior.

Huabi Wang - One of the best experts on this subject based on the ideXlab platform.

  • Design of a 70 MPa type IV hydrogen Storage Vessel using accurate modeling techniques for dome thickness prediction
    Composite Structures, 2020
    Co-Authors: Qian Zhang, Xiaolong Jia, Shuo Cheng, Huabi Wang
    Abstract:

    Abstract The aim of this study is to propose methods for dome thickness distribution and the charge pressure of the liner for a 70 MPa type IV hydrogen Storage Vessel. The netting theory was employed to design the lay-up of the cylindrical section. For precise prediction of the dome thickness, a cubic spline function was utilized. Variable polar radii were used to reduce the fiber stacking and thickness accumulation near polar openings. To evaluate the designed lay-up, various failure criteria were applied so as to predict precisely the failure of composite layers in finite element analysis. In order to determine the most appropriate range of the internal pressure when filling hydrogen gas during filament winding process, the compressive pressure applied on the liner was calculated by taking into account the variety of winding tension, and the buckling and static analysis of the liner were carried out, respectively. The methods presented in this work provide a valuable reference for designing the type IV hydrogen Storage Vessels.

Hideo Inaba - One of the best experts on this subject based on the ideXlab platform.

  • Thermal energy Storage characteristics of a latent heat Storage Vessel packed with surface cross‐linked, form‐stabilized, high‐density polyethylene pellets by boiling phenomenon
    Heat Transfer Research, 2000
    Co-Authors: Hideo Inaba, Zhongmin Li
    Abstract:

    This paper deals with an experimental investigation of latent thermal energy Storage characteristics of surface cross-linked form-stabilized high-density polyethylene pellets as a phase change material (PCM), using pool boiling and condensation of an ethylene glycol–water solution. The polyethylene pellets and the heat transfer medium of ethylene glycol were mixed and poured into a cylindrical heat Storage Vessel. The heat transfer into the polyethylene pellets was mainly enhanced by the condensation of vapor bubbles of the ethylene glycol–water solution, which was heated by an electric heater set at the bottom of the Vessel. The effects of heat input; amounts of PCM and ethylene glycol–water solution; and heater surface temperature on the heat Storage characteristics were all investigated. As a result, a nondimensional correlation equation of the completion time of the heat Storage process was derived as a function of nondimensional parameters. © 1999 Scripta Technica, Heat Trans Asian Res, 28(8): 649–663, 1999

  • Transient heat release characteristics of a latent heat Storage Vessel packed with polyethylene pellets
    Transactions of the Japan Society of Mechanical Engineers. B, 1999
    Co-Authors: Hideo Inaba, Akihiko Horibe, Zhongmin Li, Koichi Ozaki
    Abstract:

    Transient heat release characteristics of a latent heat Storage Vessel packed with surface cross-linked form stabilized high-density polyethylene pellets as a phase change material (PCM) have been investigated numerically and experimentally. The obtained results revealed the effects of the inlet velocity, the inlet temperature of ethylene glycol/water solution as a heat transfer medium, and the amount of the PCM on the heat release characteristics. As a result, the nondimensional correlation equation of the completion time of the heat release process was derived as a function of some nondimensional parameters.

  • Heat Storage characteristics of shaped-stabilized latent heat Storage particles in a fluidized bed-type heat Storage Vessel
    Transactions of the Japan Society of Mechanical Engineers. B, 1997
    Co-Authors: Hideo Inaba, Kouichi Ozaki, Akihiko Horibe, Takayuki Yamazawa
    Abstract:

    This paper deals with fluidization and heat Storage characteristics of shape-stabilized latent heat Storage particles packed into a fluidized bed-type heat Storage Vessel. The shape-stabilized latent heat Storage material consists of normal paraffin (pentacosane C25H52, latent heat 164 kJ/kg, melting point of 327.2 K) as a latent heat material, and polyethylene as a shape-stabilizing material. The pressure losses both on fluidized and on fixed particle layers were measured in order to investigate flow behavior in the heat Storage Vessel. It was found that the pressure loss of the fluidized particle layer was lower than that of the fixed particle layer. Furthermore, the effects of hot air flow rate, inlet air temperature and the amount of heat Storage particles packed into the heat Storage Vessel on the completion time of the heat Storage process were investigated. As a result, the nondimensional correlations for the completion time of the heat Storage process were expressed in terms of nondimensional pumping power, the Stefan number and the ratio of the packed particle layer height to the diameter of the cylindrical heat Storage Vessel.

  • Numerical Analysis of Heat Storage Characteristics of a Small Heat Storage Vessel Packed with Phase-Change Material Encapsulated into Spherical Hollow.
    Transactions of the Japan Society of Mechanical Engineers. B, 1997
    Co-Authors: Koichi Ozaki, Hideo Inaba, Akihiro Shigemori
    Abstract:

    We numerically investigate heat Storage characteristics of a small heat Storage Vessel packed with phase-change material (PCM) encapsulated into a spherical hollow. The heat Storage Vessel is dealt with as a porous medium, and the flow of the working fluid is analyzed two-dimensionally using the modified Darcian momentum equation which takes into account both the buoyancy effect and the channeling effect. The heat transfer in the encapsulated PCM is analyzed using a one-dimensional heat conduction model. It is clarified that the completion of the heat Storage process is delayed by natural convection, since the incoming hot working fluid flows mainly near the upper part of the Vessel. It is also found that the nonhomogeneity near the boundary walls prolongs the heat Storage process since it decreases the flow resistance near the walls and promotes a bypass flow near the upper wall due to the natural convection. A nondimensional equation is derived for the time taken to complete heat Storage, where the Fourier number is expressed as a function of the modified Stefan number, the modified Reynolds number and the modified Grashof number.

  • transient heat characteristics of a rectangular heat Storage Vessel packed with shape stabilized phase change material effect of various factors on heat release process
    Transactions of the Japan Society of Mechanical Engineers. B, 1996
    Co-Authors: Hideo Inaba, T U Ping
    Abstract:

    Transient heat release characteristics of a rectangular latent heat Storage Vessel packed with shape-stabilized phase change (solid-liquid) material (PCM) are investigated numerically with the finite difference technique. It is found that the heat release characteristics are greatly affected by the flow direction of the heat transfer medium since natural and forced convections coexist in the heat Storage Vessel. It is clarified that the thermal efficiency of the latent heat Storage system is obtained by an upward flow along the vertical PCM for heat release process The effect of the inlet velocity and the inlet temperature of heat transfer medium and the dimensions of the phase change material on transient heat release characteristics of the latent heat Storage system are also revealed in the present study.