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Alaattin Aktaş - One of the best experts on this subject based on the ideXlab platform.

  • An experimental investigation of the bearing strength of weft-knitted 1 × 1 rib Glass fiber composites
    Composite Structures, 2007
    Co-Authors: Mevlüt Tercan, Alaattin Aktaş
    Abstract:

    Abstract An experimental study has been carried out to investigate the bearing strength of a weft-knitted 1 × 1 rib Glass-fiber composite plate pinned-joint in three directions: 0°, 45° and 90°. The knitted fabrics used for the study are manufactured from the 200 tex Glass Yarn with epoxy resin and cured in a hot press machine. The experiments were carried out according to the ASTM D953 standard [1] . The ratio of the edge distance to the pin diameter ( E / d ), and the ratio of the specimen width to the pin diameter ( W / d ) were systematically varied during experiments. The results show that the bearing values obtained from the wale directions are stronger than the course and 45° directions. Additionally, each direction reaches their upper limit bearing strengths when E / d and W / d ratios are equal or greater than 4. The knitted fabric composite material gives nearly isotropic feature.

  • Comparison of tensile properties of weft-knit 1 × 1 rib Glass/epoxy composites with a different location of layers
    Materials & Design, 2006
    Co-Authors: Mevlüt Tercan, Mehmet Emin Yüksekkaya, Alaattin Aktaş
    Abstract:

    Abstract In this study, the tensile properties of 1 × 1 rib knitted fabric composites were determined in three directions 0°, 45°, and 90°. The composites were produced in two different cases as two types with different location of layers. In the first type of composites, layers were located in a plain manner parallel to each other and in the second type of composites, layers were positioned like a sandwich structure. The knitted fabrics used for the study are manufactured from a 200 tex Glass Yarn with epoxy resin and cured in a hot press machine. The values of the composites obtained from the measurements were compared. The results showed that the tensile properties of first type and second type of composite materials vary with respect to direction and orientation of the layers.

  • Determination of the critical crack length of notched weft-knitted Glass fiber variable width composite plates
    Composite Structures, 2006
    Co-Authors: Mevlüt Tercan, Alaattin Aktaş
    Abstract:

    In this study, the critical crack length (CCL) of the knitted composite plates with different central holes and different plate width were predicted by means of point stress criterion, (PSC), and average stress criterion, (ASC). The knitted fabrics used for the study are fabricated from the 200 tex Glass Yarn with epoxy resin and cured in a hot press machine. Specimens with 10, 20 or 40 mm width (W) and containing 2, 3, 4 or 5 mm diameter holes (D) were prepared for two configurations and then tested. The CCL found through the stress criteria from the experimental data. The CCL data are plotted with respect to D/W ratios and then logarithmic curves were fitted to the data by using curve fitting technique. The results show that the CCL depends on the hole size as well as width of the plate. In addition, the CCL curves obtained by curve fitting technique give the same character and also it can be observed that there is a correlation between the curves. As a result of that the CCL can be predicted by anyone by using the less experimental data.

Mehmet Erdem Ince - One of the best experts on this subject based on the ideXlab platform.

  • The Effect of Number and Position of Tuck Stitches within the Pattern Repeat on Air Permeability of Weft-knitted Fabrics from Glass Yarn
    Academic Perspective Procedia, 2019
    Co-Authors: Mehmet Erdem Ince
    Abstract:

    The fact that weft knitted fabrics has a stretchable, 3D, porous and interlocking structure makes them unique when manufactured from high performance fibers. Knitted fabrics with different architectures exhibit different properties. Different loop forms like tuck and skip stitches with various loop lengths reveal different physical and mechanical properties. Literature review indicated that wisely arrangement of tuck stitches within the pattern repeat alter the weft-knitted fabric structure from natural and synthetic fibers. Therefore, we studied the effect of number and location of tuck stiches on air permeability of weft-knitted fabrics from Glass Yarn. Single-bed, flat weft knitting machine was used to knit fabrics with different architectures from three-ply Glass Yarn. The nominal single-end count of used E-Glass Yarn was 136 tex. It is anticipated that the number and location of tuck stitches within knit pattern effect physical and air permeability properties of weft-knitted fabrics from Glass Yarn.

  • air permeability and bursting strength of weft knitted fabrics from Glass Yarn part i cam setting and number of Yarn ply effect
    Journal of The Textile Institute, 2019
    Co-Authors: Mehmet Erdem Ince, Hilal Yildirim
    Abstract:

    This study revealed the effect of cam setting and number of Yarn ply on air permeability and bursting strength of weft-knitted fabrics from Glass Yarn. Change in cam setting from loose to tight level increased fiber content, and stitch-density; while it decreased loop length. Fabrics with 3-ply Yarn exhibited higher fiber content; lower stitch-density; and longer loop length than fabrics with 2-ply Yarn. Cam setting showed more pronounced effect on physical properties of fabric than number of Yarn ply. Fabrics knitted via tight cam setting level exhibited less air permeability, and higher bursting strength than fabrics knitted via loose cam setting. Fabrics from 3-ply Yarn showed less air permeability and higher bursting strength than fabrics from 2-ply Yarn. Loop length, wale density, and fiber content were determined as the most effective physical properties on permeability and bursting strength. A negative correlation was detected between air permeability and bursting strength.

  • Air permeability and bursting strength of weft-knitted fabrics from Glass Yarn. Part II: knit architecture effect
    Journal of The Textile Institute, 2018
    Co-Authors: Mehmet Erdem Ince, Hilal Yildirim
    Abstract:

    AbstractIn this study; the effects of loop, skip, and tuck stitch types, and weft-inlay Yarn, on air permeability and bursting strength of weft-knitted fabrics from Glass Yarn were revealed. Due to...

Mevlüt Tercan - One of the best experts on this subject based on the ideXlab platform.

  • An experimental investigation of the bearing strength of weft-knitted 1 × 1 rib Glass fiber composites
    Composite Structures, 2007
    Co-Authors: Mevlüt Tercan, Alaattin Aktaş
    Abstract:

    Abstract An experimental study has been carried out to investigate the bearing strength of a weft-knitted 1 × 1 rib Glass-fiber composite plate pinned-joint in three directions: 0°, 45° and 90°. The knitted fabrics used for the study are manufactured from the 200 tex Glass Yarn with epoxy resin and cured in a hot press machine. The experiments were carried out according to the ASTM D953 standard [1] . The ratio of the edge distance to the pin diameter ( E / d ), and the ratio of the specimen width to the pin diameter ( W / d ) were systematically varied during experiments. The results show that the bearing values obtained from the wale directions are stronger than the course and 45° directions. Additionally, each direction reaches their upper limit bearing strengths when E / d and W / d ratios are equal or greater than 4. The knitted fabric composite material gives nearly isotropic feature.

  • Comparison of tensile properties of weft-knit 1 × 1 rib Glass/epoxy composites with a different location of layers
    Materials & Design, 2006
    Co-Authors: Mevlüt Tercan, Mehmet Emin Yüksekkaya, Alaattin Aktaş
    Abstract:

    Abstract In this study, the tensile properties of 1 × 1 rib knitted fabric composites were determined in three directions 0°, 45°, and 90°. The composites were produced in two different cases as two types with different location of layers. In the first type of composites, layers were located in a plain manner parallel to each other and in the second type of composites, layers were positioned like a sandwich structure. The knitted fabrics used for the study are manufactured from a 200 tex Glass Yarn with epoxy resin and cured in a hot press machine. The values of the composites obtained from the measurements were compared. The results showed that the tensile properties of first type and second type of composite materials vary with respect to direction and orientation of the layers.

  • Determination of the critical crack length of notched weft-knitted Glass fiber variable width composite plates
    Composite Structures, 2006
    Co-Authors: Mevlüt Tercan, Alaattin Aktaş
    Abstract:

    In this study, the critical crack length (CCL) of the knitted composite plates with different central holes and different plate width were predicted by means of point stress criterion, (PSC), and average stress criterion, (ASC). The knitted fabrics used for the study are fabricated from the 200 tex Glass Yarn with epoxy resin and cured in a hot press machine. Specimens with 10, 20 or 40 mm width (W) and containing 2, 3, 4 or 5 mm diameter holes (D) were prepared for two configurations and then tested. The CCL found through the stress criteria from the experimental data. The CCL data are plotted with respect to D/W ratios and then logarithmic curves were fitted to the data by using curve fitting technique. The results show that the CCL depends on the hole size as well as width of the plate. In addition, the CCL curves obtained by curve fitting technique give the same character and also it can be observed that there is a correlation between the curves. As a result of that the CCL can be predicted by anyone by using the less experimental data.

Hilal Yildirim - One of the best experts on this subject based on the ideXlab platform.

Thouraya Baranger - One of the best experts on this subject based on the ideXlab platform.

  • pull out response of Glass Yarn from ettringite matrix effect of pre impregnation and embedded length
    Composites Science and Technology, 2019
    Co-Authors: O Homoro, M Michel, Thouraya Baranger
    Abstract:

    Abstract The interest in textile-reinforced concrete materials has grown in recent years, owing to their many advantages (high strength, good corrosion resistance, non-toxicity, availability of raw materials, recyclability, etc.). However, the use of multifilament reinforcements for cements is challenging because the cement particles cannot fully penetrate the space between the inner filaments, thus leading to the decrease in the Yarn–matrix bond and consequently the mechanical performance of the composite. To improve this bond, the Glass Yarns are typically pre-impregnated in a wet manner using mineral or organic powders. The objective of this work is to compare this conventional method with a recent method called pre-impregnation in a dry manner. It is based on using an alternating electrostatic field that allows powder to be impregnated into Yarns. The pull-out response of alkali-resistant Glass Yarn embedded in the ettringite matrix is investigated and reported in this study. Three types of specimens were tested: a dry Yarn, a Yarn pre-impregnated in a wet manner with matrix particles, and a Yarn pre-impregnated in a dry manner with different types of powder. Four embedded lengths are investigated and their effect on the result is discussed. We found that the pull-out behaviour is dependent on the pre-impregnation method, pre-impregnation powder type, and embedded length.