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Philippe Boisse - One of the best experts on this subject based on the ideXlab platform.

  • Meso-macro simulations of Textile Composite forming
    ASME 2008 International Manufacturing Science and Engineering Conference Volume 1, 2020
    Co-Authors: Nahiene Hamila, Philippe Boisse, S. Chatel
    Abstract:

    Composite Textile reinforcement draping simulations aid in determining the processing conditions for a quality part and in finding the positions of the fibers after forming. This last point is essential for the structural computations of the Composite part and for resin injection analyses in the case of LCM processes. Because the Textile Composite reinforcements are multiscale materials, continuous (macro) approaches and discrete (meso) approaches that model the yarns have been developed. The finite element that is proposed in this paper for Textile fabric forming is composed of woven unit cells. The mechanical behaviour of these is analyzed by 3D computations at the mesoscale. The warp and weft directions of the woven fabric can be in an arbitrary direction with respect to the direction of the element side. This is very important in the case of multi-ply deep drawing and when using remeshing. The element is efficient because it is close to the physics of the woven cell while avoiding the very large number of unknowns in the discrete approach. A set of validation tests and forming simulations on single-ply and multi-ply fabrics is presented and shows the efficiency of the approach.Copyright © 2008 by ASME

  • Hypoelastic, hyperelastic, discrete and semi-discrete approaches for Textile Composite reinforcement forming
    International Journal of Material Forming, 2010
    Co-Authors: Philippe Boisse, Yamina Aimène, Abdelwaheb Dogui, Samia Dridi, Sébastien Gatouillat, Nahiene Hamila, Muhammad Aurangzeb Khan, Tarek Mabrouki, Fabrice Morestin, Emmanuelle Vidal-sallé
    Abstract:

    The clear multi-scale structure of Composite Textile reinforcements leads to develop continuous and discrete approaches for their forming simulations. In this paper two continuous modelling respectively based on a hypoelastic and hyperelastic constitutive model are presented. A discrete approach is also considered in which each yarn is modelled by shell finite elements and where the contact with friction and possible sliding between the yarns are taken into account. Finally the semi-discrete approach is presented in which the shell finite element interpolation involves continuity of the displacement field but where the internal virtual work is obtained as the sum of tension, in-plane shear and bending ones of all the woven unit cells within the element. The advantages and drawbacks of the different approaches are discussed.

  • Semi-discrete shell finite elements for Textile Composite forming simulation
    International Journal of Material Forming, 2009
    Co-Authors: Nahiene Hamila, Philippe Boisse, S. Chatel
    Abstract:

    The Composite Textile reinforcement draping simulations allows the conditions for a successful process to be determined and, most importantly, the positions of the fibres after forming to be known. This last point is essential for the structural computations of the Composite part and for resin injection analyses in the case of LCM processes. Because the Textile Composite reinforcements are multiscale materials, continuous (macro) approaches and discrete (meso) approaches that model the yarns have been developed. The finite element that is proposed in this paper for Textile fabric forming is composed of woven unit cells. The warp and weft directions of the woven fabric can be in arbitrary direction with respect to the direction of the element side. This is very important in the case of multi-ply deep drawing and when using remeshing. The element is efficient because it is close to the physic of the woven cell while avoiding the very large number of unknowns in the discrete approach.

  • a meso macro three node finite element for draping of Textile Composite preforms
    Applied Composite Materials, 2007
    Co-Authors: Nahiene Hamila, Philippe Boisse
    Abstract:

    The Composite Textile reinforcement draping simulations allows the conditions for a successful process to be determined and, most importantly, the positions of the fibres after forming to be known. This last point is essential for the structural computations of the Composite part and for resin injection analyses in the case of LCM processes. Because the Textile Composite reinforcements are multiscale materials, continuous (macro) approaches and discrete (meso) approaches that model the yarns have been developed. The finite element that is proposed in this paper for Textile fabric forming is composed of woven unit cells. The mechanical behaviour of these is analyzed by 3D computations at the mesoscale regarding biaxial tensions and in plane shear. The warp and weft directions of the woven fabric can be in arbitrary direction with respect to the direction of the element side. This is very important in the case of multi-ply deep drawing and when using remeshing. The element is efficient because it is close to the physic of the woven cell while avoiding the very large number of unknowns in the discrete approach. A set of validation tests and forming simulations on single ply and multi-ply are presented and show the efficiency of the approach. In particular the importance of the in-plane shear behaviour is emphasized in the case of a draping on a cube.

  • A Meso–Macro Three Node Finite Element for Draping of Textile Composite Preforms
    Applied Composite Materials, 2007
    Co-Authors: Nahiene Hamila, Philippe Boisse
    Abstract:

    The Composite Textile reinforcement draping simulations allows the conditions for a successful process to be determined and, most importantly, the positions of the fibres after forming to be known. This last point is essential for the structural computations of the Composite part and for resin injection analyses in the case of LCM processes. Because the Textile Composite reinforcements are multiscale materials, continuous (macro) approaches and discrete (meso) approaches that model the yarns have been developed. The finite element that is proposed in this paper for Textile fabric forming is composed of woven unit cells. The mechanical behaviour of these is analyzed by 3D computations at the mesoscale regarding biaxial tensions and in plane shear. The warp and weft directions of the woven fabric can be in arbitrary direction with respect to the direction of the element side. This is very important in the case of multi-ply deep drawing and when using remeshing. The element is efficient because it is close to the physic of the woven cell while avoiding the very large number of unknowns in the discrete approach. A set of validation tests and forming simulations on single ply and multi-ply are presented and show the efficiency of the approach. In particular the importance of the in-plane shear behaviour is emphasized in the case of a draping on a cube.

Nahiene Hamila - One of the best experts on this subject based on the ideXlab platform.

  • Meso-macro simulations of Textile Composite forming
    ASME 2008 International Manufacturing Science and Engineering Conference Volume 1, 2020
    Co-Authors: Nahiene Hamila, Philippe Boisse, S. Chatel
    Abstract:

    Composite Textile reinforcement draping simulations aid in determining the processing conditions for a quality part and in finding the positions of the fibers after forming. This last point is essential for the structural computations of the Composite part and for resin injection analyses in the case of LCM processes. Because the Textile Composite reinforcements are multiscale materials, continuous (macro) approaches and discrete (meso) approaches that model the yarns have been developed. The finite element that is proposed in this paper for Textile fabric forming is composed of woven unit cells. The mechanical behaviour of these is analyzed by 3D computations at the mesoscale. The warp and weft directions of the woven fabric can be in an arbitrary direction with respect to the direction of the element side. This is very important in the case of multi-ply deep drawing and when using remeshing. The element is efficient because it is close to the physics of the woven cell while avoiding the very large number of unknowns in the discrete approach. A set of validation tests and forming simulations on single-ply and multi-ply fabrics is presented and shows the efficiency of the approach.Copyright © 2008 by ASME

  • A dissipative constitutive model for woven Composite fabric under large strain
    Composites Part A-applied Science and Manufacturing, 2018
    Co-Authors: Yvan Denis, Nahiene Hamila, E. Guzman-maldonado, J. Colmars, Fabrice Morestin
    Abstract:

    Abstract Draping Composite reinforcement on non-developable shapes necessarily leads to deformations in the plane generating large shears between warp and weft. Sliding between fibers and between yarns creates friction that dissipates energy. This paper presents a constitutive model describing the dissipative behaviour of 2D Composite Textile reinforcements under large strain. The model is based on two innovative points. First, the additive decomposition of Green-Naghdi is considered, which leads to write the yield function and the plastic law in a conventional manner, which is very uncommon for anisotropic fields. Secondly, nested surfaces according with Mroz Theory define the strong non-linearity of the problem. The use of these two points allows to define a flexible dissipative model for numerical simulations. The dissipation process driven by fibers friction is exclusively associated with the in-plane shear deformation mode. As a result, the material parameters are calibrated using standard methods, like the Picture Frame.

  • Hypoelastic, hyperelastic, discrete and semi-discrete approaches for Textile Composite reinforcement forming
    International Journal of Material Forming, 2010
    Co-Authors: Philippe Boisse, Yamina Aimène, Abdelwaheb Dogui, Samia Dridi, Sébastien Gatouillat, Nahiene Hamila, Muhammad Aurangzeb Khan, Tarek Mabrouki, Fabrice Morestin, Emmanuelle Vidal-sallé
    Abstract:

    The clear multi-scale structure of Composite Textile reinforcements leads to develop continuous and discrete approaches for their forming simulations. In this paper two continuous modelling respectively based on a hypoelastic and hyperelastic constitutive model are presented. A discrete approach is also considered in which each yarn is modelled by shell finite elements and where the contact with friction and possible sliding between the yarns are taken into account. Finally the semi-discrete approach is presented in which the shell finite element interpolation involves continuity of the displacement field but where the internal virtual work is obtained as the sum of tension, in-plane shear and bending ones of all the woven unit cells within the element. The advantages and drawbacks of the different approaches are discussed.

  • Semi-discrete shell finite elements for Textile Composite forming simulation
    International Journal of Material Forming, 2009
    Co-Authors: Nahiene Hamila, Philippe Boisse, S. Chatel
    Abstract:

    The Composite Textile reinforcement draping simulations allows the conditions for a successful process to be determined and, most importantly, the positions of the fibres after forming to be known. This last point is essential for the structural computations of the Composite part and for resin injection analyses in the case of LCM processes. Because the Textile Composite reinforcements are multiscale materials, continuous (macro) approaches and discrete (meso) approaches that model the yarns have been developed. The finite element that is proposed in this paper for Textile fabric forming is composed of woven unit cells. The warp and weft directions of the woven fabric can be in arbitrary direction with respect to the direction of the element side. This is very important in the case of multi-ply deep drawing and when using remeshing. The element is efficient because it is close to the physic of the woven cell while avoiding the very large number of unknowns in the discrete approach.

  • a meso macro three node finite element for draping of Textile Composite preforms
    Applied Composite Materials, 2007
    Co-Authors: Nahiene Hamila, Philippe Boisse
    Abstract:

    The Composite Textile reinforcement draping simulations allows the conditions for a successful process to be determined and, most importantly, the positions of the fibres after forming to be known. This last point is essential for the structural computations of the Composite part and for resin injection analyses in the case of LCM processes. Because the Textile Composite reinforcements are multiscale materials, continuous (macro) approaches and discrete (meso) approaches that model the yarns have been developed. The finite element that is proposed in this paper for Textile fabric forming is composed of woven unit cells. The mechanical behaviour of these is analyzed by 3D computations at the mesoscale regarding biaxial tensions and in plane shear. The warp and weft directions of the woven fabric can be in arbitrary direction with respect to the direction of the element side. This is very important in the case of multi-ply deep drawing and when using remeshing. The element is efficient because it is close to the physic of the woven cell while avoiding the very large number of unknowns in the discrete approach. A set of validation tests and forming simulations on single ply and multi-ply are presented and show the efficiency of the approach. In particular the importance of the in-plane shear behaviour is emphasized in the case of a draping on a cube.

R Ilangovan - One of the best experts on this subject based on the ideXlab platform.

  • reuse of Textile effluent treatment plant sludge in building materials
    Waste Management, 2006
    Co-Authors: J Balasubramanian, P C Sabumon, John U Lazar, R Ilangovan
    Abstract:

    This study examines the potential reuse of Textile effluent treatment plant (ETP) sludge in building materials. The physico-chemical and engineering properties of a Composite Textile sludge sample from the southern part of India have been studied. The tests were conducted as per Bureau of Indian Standards (BIS) specification codes to evaluate the suitability of the sludge for structural and non-structural application by partial replacement of up to 30% of cement. The cement–sludge samples failed to meet the required strength for structural applications. The strength and other properties met the Bureau of Indian Standards for non-structural materials such as flooring tiles, solid and pavement blocks, and bricks. Results generally meet most ASTM standards for nonstructural materials, except that the sludge-amended bricks do not meet the Grade NW brick standard. It is concluded that the substitution of Textile ETP sludge for cement, up to a maximum of 30%, may be possible in the manufacturing of non-structural building materials. Detailed leachability and economic feasibility studies need to be carried out as the next step of research. � 2005 Elsevier Ltd. All rights reserved.

Umit Halis Erdogan - One of the best experts on this subject based on the ideXlab platform.

  • flame retardancy behaviors and structural properties of polypropylene nano sio2 Composite Textile filaments
    Journal of Applied Polymer Science, 2009
    Co-Authors: Nilufer Erdem, Aysun Cireli, Umit Halis Erdogan
    Abstract:

    The number of efforts about modifying the properties of polymeric fibers by organic or inorganic particles has increased recently because of high-tech applications of Textiles. In addition to these attempts, the discovery of nanotechnology also leads to the development of nanoparticles for various end uses such as nanoComposite fibers. In this article, we aimed to produce slow burning or flame retardant polypropylene filaments for carpet pile yarns by incorporating SiO 2 nanoparticles into polymer. Therefore, we present the preparation of filaments incorporating 0.3, 1, and 3% SiO 2 nanoparticles and investigate the effects of nanoparticles on the flame retardancy and structural behavior of filaments. Polypropylene and nanoparticles were compounded by melt-compounding using twin-screw extruder before spinning. Filaments with trilobal cross sections were spun using pilot melt spinning equipment. The structural properties of nanoComposite fibers were analyzed using X-ray difractometry, differential scanning calorymetry, scanning electron microscopy, and tensile tests. The flammability behaviors of filaments were evaluated using the oxygen index method. The effect of nanoparticles on structural properties and flame retardancy behaviors of filaments were summarized and discussed.

  • Flame retardancy behaviors and structural properties of polypropylene/nano‐SiO2 Composite Textile filaments
    Journal of Applied Polymer Science, 2009
    Co-Authors: Nilufer Erdem, Aysun Cireli, Umit Halis Erdogan
    Abstract:

    The number of efforts about modifying the properties of polymeric fibers by organic or inorganic particles has increased recently because of high-tech applications of Textiles. In addition to these attempts, the discovery of nanotechnology also leads to the development of nanoparticles for various end uses such as nanoComposite fibers. In this article, we aimed to produce slow burning or flame retardant polypropylene filaments for carpet pile yarns by incorporating SiO 2 nanoparticles into polymer. Therefore, we present the preparation of filaments incorporating 0.3, 1, and 3% SiO 2 nanoparticles and investigate the effects of nanoparticles on the flame retardancy and structural behavior of filaments. Polypropylene and nanoparticles were compounded by melt-compounding using twin-screw extruder before spinning. Filaments with trilobal cross sections were spun using pilot melt spinning equipment. The structural properties of nanoComposite fibers were analyzed using X-ray difractometry, differential scanning calorymetry, scanning electron microscopy, and tensile tests. The flammability behaviors of filaments were evaluated using the oxygen index method. The effect of nanoparticles on structural properties and flame retardancy behaviors of filaments were summarized and discussed.

P. Hamelin - One of the best experts on this subject based on the ideXlab platform.

  • Numerical and experimental stiffness characterisations applied to soft Textile Composites for tensile structures
    Materials and Structures, 1998
    Co-Authors: C. Szostkiewicz-chatain, P. Hamelin
    Abstract:

    This paper presents numerical and experimental stiffness characterisation methods for soft Composite Textile membranes used in fabric roof structures.

  • Numerical and experimental stiffness characterisations applied to soft Textile Composites for tensile structures
    Materials and Structures, 1998
    Co-Authors: C. Szostkiewicz-chatain, P. Hamelin
    Abstract:

    Cet article présente des techniques numériques et expérimentales de caractérisation en rigidité de membranes Textiles Composites souples utilisées en architecture tensible. Le matériau étudié est un tissu taffetas en polyester enduit sur chaque face de PVC. Trois modélisations numériques de la microstructure du Composite Textile, intégrées à des logiciels de calculs des rigidités en élasticité linéaire, sont présentées et appliquées à un exemple précis. Les deux premières ont une approche basée sur la théorie des plaques minces multicouches; le tissue est modélisé soit par une superposition de couches à renforts unidirectionnels, soit par une représentation ondulée (‘Crimp Model’). La troisième considère une approche géométrique de la cellule élémentaire de tissu; les caractéristiques élastiques sont déterminées par assemblage des éléments de subdivision. En outre, nous proposons une méthode inverse expérimentale d'identification des rigidités des matériaux par l'exploitation de résultats d'essais biaxiaux dans les directions d'orthotropie. La caractérisation expérimentale porte sur des essais de tension biaxiale sur éprouvettes cruciformes, contrôlés en vitesse de montée en charge, et utilisant différents rapports de chargement selon les directions chaîne et trame: 1/1,1/2 et 2/1. This paper presents numerical and experimental stiffness characterisation methods for soft Composite Textile membranes used in fabric roof structures. The studied material is a polyester plain-woven fabric coated with PVC. We present three numerical Textile Composite micro-structure models. They are integrated in stiffness calculation software programs which are used to identify linear elastic characteristics for a coated fabric sample. The first two models are based on the laminated thin plate theory; the fabric is represented by a stacking of unidirectionally-reinforced layers, or by the ‘Crimp Model’. The third one considers a geometrical approach to the basic cell of the fabric; the elastic characteristics are calculated by assembly of the meshing elements. In addition, an inverse and experimental stiffness identification method, based on biaxial tensile tests conducted (in orthotropic directions), is proposed. Load-controlled tests are conducted on cross-shaped samples with different loading ratios in warp and weft directions: 1/1,1/2,2/1.