Relevant bibliographies by topics / Yarn impregnation

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Yarn impregnation'

Author: Grafiati
Published: 4 June 2021
Last updated: 6 February 2022

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Journal articles on the topic "Yarn impregnation"

1

Slama, Anne-Claire, Jean-Louis Gallias, and Bruno Fiorio. "Study of the pull-out test of multifilament yarns embedded in cementitious matrix." Journal of Composite Materials 55, no. 2 (July 29, 2020): 169–85. http://dx.doi.org/10.1177/0021998320946368.

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In order to understand the impregnation mechanism of a yarn by a cementitious matrix and its influence on the mechanical properties of a yarn/cement composite, pull-out tests have been performed on samples of yarn/cement. Two embedded lengths for the yarn and different rheological and mechanical properties for the matrix were tested. Two pull-out modes were distinguished according to the compressive strength of matrices. For matrices with a compressive strength between 60 and 70 MPa the pull-out mode is characterized by a behaviour close to the tensile behaviour of the yarn, with maximum load values reaching approximately 60% of the tensile maximum load because of filaments damages. For matrices with compressive strength inferior to 60 MPa, the pull-out mode exhibits a residual phase linked to a slippage and an extraction of a variable number of filaments, with lower maximum load values than the first pull-out mode. After pull-out test, for some samples with filaments extraction, an innovative method based on a double impregnation with resin enables to visualize the yarn/matrix interface and identify the level of impregnation of the filaments by using confocal microscopy. It is concluded that this level of impregnation has a direct influence on the mechanical behaviour of the embedded yarn, except for the slippage and extraction phase, but the rheological properties of the matrix has no significant influence on this impregnation.
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Eddine Tria, Djalel, Larbi Hemmouche, Abdelhadi Allal, and Abdelkader Benouali. "Experimental and numerical analysis of high and low velocity impacts against neat and shear thickening fluid (STF) impregnated weave fabrics." EPJ Web of Conferences 183 (2018): 01044. http://dx.doi.org/10.1051/epjconf/201818301044.

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This investigation aims to study the efficiency of STF impregnated plain-weave fabric made of Kevlar under high and low velocity impact conditions. The shear thickening fluid (STF) was prepared by ultrasound irradiation of silica nanoparticles (diameter ≈30 nm) dispersed in liquid polyethylene glycol polymer. STF impregnation effect was determined from single yarn pull-out test and penetration at low velocity using drop weight machine equipped with hemi-spherical penetrator and dynamic force sensor. Force-displacement curves of neat and impregnated Kevlar were analysed and compared. Also, the STF impregnation effect on Kevlar multilayers was analysed from high velocity impact tests using 9mm FMJ bullet at 390 m/s. After impact, Back face deformation (BFD) of neat and impregnated Kevlar layers were measured and compared. Results showed that STF impregnated fabrics have better energy absorption and penetration resistance as compared to neat fabrics without affecting the fabric flexibility. When relative yarn translations are restricted (e.g. at very high levels of friction), windowing and yarn pull-out cannot occur, and the fibres engaged with the projectile fail in tension that leads to fabric penetration. Microscopy of these fabrics after testing have shown pitting and damage to the Kevlar filaments caused by the hard silica particles used in the STF. Mesoscopic 3D Finite Element models were developed using explicit LS-DYNA hydrocode to account for STF impregnation by employing the experimental results of yarn pull-out tests, low and high velocity impacts. It was found that friction between fibers and yarns increase the dissipation of energy upon impact by restricting fiber mobility, increasing the energy required for relative yarn translations and transferring the impact energy to a larger number of fibers.
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Ono, Mizuki, Masachika Yamane, Shuichi Tanoue, Hideyuki Uematsu, and Yoshihiro Yamashita. "Mechanical Properties of Thermoplastic Composites Made of Commingled Carbon Fiber/Nylon Fiber." Polymers 13, no. 19 (September 22, 2021): 3206. http://dx.doi.org/10.3390/polym13193206.

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Commingled yarns consisting of thermoplastic nylon fibers and carbon fibers can be used to produce superior carbon fiber reinforced thermoplastics (CFRTP) by applying fiber spreading technology after commingling. In this study, we examined whether spread commingled carbon fiber/nylon fiber yarns could reduce the impregnation distance, as there are few reports on this. From this study, the following are revealed. The impregnation speed of the nylon resin on the carbon fiber was very fast, less than 1 min. As the molding time increased, the tensile strength and tensile fracture strain slightly decreased, and the nylon resin deteriorated. The effects of molding time on flexural strength, flexural modulus, and flexural fracture strain were negligible. From the cross-sectional observation conducted to confirm the impregnation state of the matrix resin, no voids were observed in the molded products, regardless of molding time or molding pressure, indicating that resin impregnation into the carbon fiber bundle of the spread commingled yarn fabric was completed at a molding pressure of 5 MPa and a molding time of 5 min.
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Nguyen-Chung, Tham, Klaus Friedrich, and Günter Mennig. "Processability of Pultrusion Using Natural Fiber and Thermoplastic Matrix." Research Letters in Materials Science 2007 (2007): 1–5. http://dx.doi.org/10.1155/2007/37123.

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Fundamental mechanisms of the pultrusion process using commingled yarns of polypropylene matrix and discontinuous flax fiber to produce thermoplastic profiles were investigated in numerical and experimental manners. Essential issue is the fact that all natural fibers are discontinuous by nature, which may negatively influence the processability. The pultrusion process will be only successful if the pulling force exerted on the solidified pultrudates can be transmitted to the regions of unmelted commingled yarns by “bridging over” those melted regions within the die. This can be realized by applying a sufficient number of small yarn bundles of high compactness rather than a thicker single bundle of lower compactness as the raw material. Furthermore, the possibility of adding extra melt into the yarn bundles by side-fed extrusion has been investigated showing that the impregnation can be improved only for the outer layers of yarns, which is owed to the high viscosity of the thermoplastic melt and the limited length of the die.
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Matsuo, Tatsuki, and Naoto Ikegawa. "Impregnation Behavior and Transverse Bending properties of Thermoplastic Composites Made from Commingled Twisted Spun Yarn." Advanced Composites Letters 1, no. 3 (May 1992): 096369359200100. http://dx.doi.org/10.1177/096369359200100310.

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Transverse bending tests were carried out for unidirectional composites fabricated from twisted spun yarn commingled of carbon fiber and Nylon 6 fiber by compression molding. Transverse bending strength was explained in conjunction with their impregnation behaviors.
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Maeda, Tomoyuki, Yoshihiro Hirata, Joe Sugimoto, Soichiro Sameshima, Toshifumi Yoshidome, and Masaki Shibuya. "Comparison of Tensile Fracture Behavior between Si-Ti-C-O Fiber Bundle (Yarn), Woven Fabric of Yarn and Laminated Composite of the Si-Ti-C-O Fabric / Mullite Filler / Polytitanocarbosilane System." Key Engineering Materials 287 (June 2005): 432–37. http://dx.doi.org/10.4028/www.scientific.net/kem.287.432.

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A polytitanocarbosilane (20-30 mass%)-xylene solution was infiltrated into a porous laminated composite with 35-40 vol% Si-Ti-C-O fabric of 11 diameter fiber and 15-25 vol% mullite filler, and decomposed at 1000°C in an Ar atmosphere. This polymer impregnation and pyrolysis method was repeated 8 times to produce the composites of 76-82 % theoretical density. The yarn (662-765 filament / yarn), fabric and composite provided the following average strengths : 1240 MPa for the yarn; 768 MPa for the fabric; 117 MPa for the composite. The fracture probability of the yarn, fabric and composite was well fitted by the normal distribution function. The tensile strength of the composite was interpreted by the product of the effective fiber content, the Young's modulus of the fiber and elongation of the composite.
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Matsuo, Tatsuki, and Naoto Ikegawa. "Impregnation Behavior and Longitudinal Bending properties of Thermoplastic Composites Made from Commingled Twisted Spun Yarn." Advanced Composites Letters 1, no. 3 (May 1992): 096369359200100. http://dx.doi.org/10.1177/096369359200100309.

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Unidirectional composites were fabricated from twisted spun yarn commingled of carbon fiber and Nylon 6 fiber by compression molding. Longitudinal bending strength was saturated with a rather lower pressure and shorter period of compression. A clear fiber bundles- boundaries pattern is observed. Two steps of impregnation is also presumed.
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8

Kim, Sun Kyoung, Gong Min Kim, Hee June Kim, and Woo IL Lee. "An Experimental Study on the Thermoplastic Filament Winding Process using Commingled Yarns." Advanced Composites Letters 11, no. 2 (March 2002): 096369350201100. http://dx.doi.org/10.1177/096369350201100203.

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A filament winding process of commingled yarn is investigated. This study aims to verify the feasibility of the proposed winding process experimentally. A laboratory scale winding system is built which can perform in situ consolidation using a hot nitrogen gas torch. The degree of impregnation is evaluated for different process parameters including the hot nitrogen gas temperature, the process speed and the compaction force to provide a process window.
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9

Khodadadi, A., GH Liaghat, AR Sabet, H. Hadavinia, A. Aboutorabi, O. Razmkhah, M. Akbari, and M. Tahmasebi. "Experimental and numerical analysis of penetration into Kevlar fabric impregnated with shear thickening fluid." Journal of Thermoplastic Composite Materials 31, no. 3 (June 6, 2017): 392–407. http://dx.doi.org/10.1177/0892705717704485.

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This study presents the high-velocity impact performance of a composite material composed of woven Kevlar fabric impregnated with a colloidal shear thickening fluids (STFs). Although the precise role of the STF in the high-velocity defeat, process is not exactly known but it is suspected to be due to the increased frictional interaction between yarns in impregnated fabrics. In order to explore the mechanism of this enhanced energy absorption, high-velocity impact test was conducted on neat, impregnated fabric and also on pure STF without fabric. A finite element model has been carried out to consider the effect of STF impregnation on the ballistic performance. For this purpose, fabric was modeled using LS-DYNA by employing the experimental results of yarn pull-out tests to characterize the frictional behavior of the STF impregnated fabric. The simulation result is a proof that the increased performance for STF impregnated Kevlar fabric is due to the increased friction.
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Thomann, Urs I., Michael Sauter, and Paolo Ermanni. "A combined impregnation and heat transfer model for stamp forming of unconsolidated commingled yarn preforms." Composites Science and Technology 64, no. 10-11 (August 2004): 1637–51. http://dx.doi.org/10.1016/j.compscitech.2003.12.002.

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Dissertations / Theses on the topic "Yarn impregnation"

1

Aljewifi, Hana, Bruno Fiorio, and Jean-Louis Gallias. "Quantitative methods to characterize the impregnation of a glass multifilament yarn by a cementitious matrix." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1244045911361-83528.

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This paper focuses on two experimental methods that give indicators linked to the impregnation level of the yarn / matrix interface, in the case of Textile Reinforced Concrete (TRC). These methods have been tested on three different glass yarns laid in a cementitious matrix, with three different impregnation levels resulting from the manufacturing process. The first method (comparative mercury intrusion porosity test) is based on the evaluation by mercury intrusion porosity of the pores volume associated to the porosity inside and near the yarn. The second method (flow test) consists in measuring the flow rate of water along the yarn, with imposed flow conditions. The physical parameters measured by these two methods are both related to the pore size and to the porosity of the yarn / matrix interface. The results of the two methods are discussed and drawn in parallel to a qualitative characterization of the yarn matrix interface made by scanning electron microscopy. As a result, the connection between the results of the two methods and the SEM characterization is studied. It is shown how these methods can participate to characterize the yarn impregnation. Limitations of the methods are also discussed.
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Fiorio, Bruno, Hana Aljewifi, and Jean-Louis Gallias. "Connection between the Impregnation of Glass Multi-Filament Yarns and their Pull-out Behaviour." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-77795.

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This experimental study focuses on the links that exist between the mechanical pull-out behaviour of multi-filament yarns embedded in concrete and the impregnation of the yarn by the concrete. To this aim, 5 glass yarns have been embedded in concrete (AR and E glass yarns from assembled or direct roving). A pre-treatment was applied to the yarn before the casting, and was chosen in the following three: wetting, drying or pre-impregnation with a cement slurry. By this way, 15 yarn / pre-treatment combinations were obtained that generate 15 conditions of impregnation of the yarn by the cementitious matrix. In each case, the mechanical properties were determined from a classical pull-out test and the yarns impregnation properties were characterized by two dedicated tests: yarns porosity measurements and along yarn water flow measurements. By studying the relationship between the mechanical behaviour and the physical properties of the impregnated yarns, it is shown that the pre- and post-peak behaviour are mainly connected to the flow rate measured during the water flow measurements, which suggest a specific influence of the connected pores parallel to the filaments and of the penetration depth of the matrix into the yarn. The postpeak and the residual behaviour are moreover linked to the yarn pore volume associated to the disorder induced in the filaments assembly by the penetration of the matrix. The overall result of this work is a contribution to the understanding of the relationship between the impregnation of the yarns and the pull-out behaviour.
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3

Slama, Anne-Claire. "Etude de l'arrachement de fils multifilamentaires de verre dans des matrices cimentaires." Thesis, CY Cergy Paris Université, 2020. http://www.theses.fr/2020CYUN1074.

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Le renforcement du béton par des structures en acier est une technologie maîtrisée et très utilisée contrairement au renforcement avec des structures textiles à base de fils multifilamentaires. Pour cette technologie, le mécanisme d’imprégnation du fil multifilamentaire par la matrice cimentaire est complexe du fait de la structure particulière de ces fils.Afin de comprendre le mécanisme d’imprégnation d’un fil multifilamentaire par une matrice cimentaire et son influence sur les propriétés mécaniques des composites fil/matrice, des essais d’arrachement ont été réalisés sur des éprouvettes de fil enrobé dans des matrice cimentaires. Différentes longueurs d’enrobage pour le fil et des matrices avec différentes propriétés mécaniques et rhéologiques ont été testées. Deux modes de rupture à l’arrachement ont été observés selon la résistance en compression de la matrice et la longueur d’enrobage. Pour les matrices avec une résistance en compression entre 60 et 70 MPa, le mode de rupture à l’arrachement est caractérisé par un comportement proche de celui du fil en traction même avec des longueurs d’enrobage faibles (leq 1cm), avec des valeurs de charge maximale approchant les 60% de la charge maximale à la traction à cause de l’endommagement des filaments pendant la confection et la manutention des éprouvettes. Pour les matrices avec une résistance en compression inférieure à 60 MPa, le mode de rupture à l’arrachement présente une phase résiduelle liée au glissement et à l’extraction d’un nombre variable de filaments, avec des valeurs de charge maximale plus faibles que pour le premier mode évoqué et dépendantes de la longueur d’enrobage. Après le test d’arrachement, pour certains échantillons avec une extraction de filaments, une méthode innovante basée sur une double imprégnation avec de la résine permet de visualiser l’interface fil / matrice et identifier le degré d’imprégnation des différentes parties du fil en utilisant la microscopie confocale. Il est conclu que le degré d’imprégnation du fil, notamment le nombre de filaments totalement enrobés par la matrice, a une influence directe sur le comportement mécanique du fil enrobé, excepté pour la phase de glissement et d’extraction. Les propriétés rhéologiques des matrices n’ont pas d’influence significative sur cette imprégnation, sauf pour les matrices avec une résistance en compression inférieure à 30 MPa. Ainsi, pour ces dernières matrices, le mécanisme d'arrachement est différent puisque ce sont les liaisons filaments / matrice qui rompent au lieu des filaments. Ces conclusions ont permis d'améliorer les modèles analytiques mis en place pour prédire le comportement de ces composites
The reinforcement of concrete with steel structures is a well-known and well-used technology, on the contrary to the reinforcement with textile structures composed of multifilament yarns. For this technology, the impregnation mechanism of the yarn by the cementitious matrix is complex because of the particular structure of those yarns.In order to understand the impregnation mechanism of a yarn by a cementitious matrix and its influence on the mechanical properties of a yarn / matrix composite, pull-out tests have been performed on samples of yarn embedded in cementitious matrix. Different embedded lengths for the yarn and different rheological and mechanical properties for the matrix were tested. Two pull-out modes were observed according to the compressive strength of matrices and the embedded length. For matrices with a compressive strength between 60 and 70 MPa the pull-out mode is characterized by a behaviour close to the tensile behaviour of the yarn even with short embedded lengths (leq1 cm), with maximum load values reaching approximately 60% of the tensile maximum load because of filaments damages during the manufacturing and storage of the samples. For matrices with a compressive strength inferior to 60 MPa, the pull-out mode exhibits a residual phase linked to a slippage and an extraction of a variable number of filaments, with lower maximum load values than the first pull-out mode and linked to the embedded length. After pull-out test, for some samples with filaments extraction, an innovative method based on a double impregnation with resin enables to visualize the yarn / matrix interface and identify the level of impregnation of the filaments by using confocal microscopy. It is concluded that this level of impregnation, especially the number of fully embedded filaments in the cementitious matrix, has a direct influence on the mechanical behaviour of the embedded yarn, except for the slippage and extraction phase. The rheological properties of the matrix has no significant influence on this impregnation, except for matrices with a compressive strength inferior to 30 MPa. For those matrices, the pull-out mechanism is different since it is the filament / matrix bonds that fail instead of the filaments.Those conclusions enable to improve the analytical models used to predict the behaviour of those composites
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Book chapters on the topic "Yarn impregnation"

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Slama, A. C., J. L. Gallias, and B. Fiorio. "Reinforcement of Concrete with Glass Multifilament Yarns: Effect of the Impregnation on the Yarn Pull-Out Behaviour." In RILEM Bookseries, 971–82. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-58482-5_85.

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Klinkmüller, V., R. Kästel, L. Ye, and K. Friedrich. "On Impregnation Quality and Resulting Mechanical Properties of Compression Moulded Commingled Yarn Based Thermoplastic Composites." In IUTAM Symposium on Microstructure-Property Interactions in Composite Materials, 189–201. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0059-5_16.

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Conference papers on the topic "Yarn impregnation"

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Kobayashi, Satoshi, and Toshiko Osada. "Experimental and Analytical Resin Impregnation Characterization in Carbon Fiber Reinforced Thermoplastic Composites." In JSME 2020 Conference on Leading Edge Manufacturing/Materials and Processing. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/lemp2020-8627.

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Abstract Effect of molding condition on resin impregnation behavior and the associated mechanical properties were investigated for carbon fabric reinforced thermoplastic composites. Carbon fiber yarn (TORAYCA, Toray) was used as a reinforcement, and thermoplastic PI (AURUM PL 450 C, Mitsui Chemicals) was used as the matrix. CFRTP textile composites were compression-molded with a hot press system under the molding temperature, 390 °C, 410 °C and 430 °C, molding pressure 2 MPa and 4 MPa and molding time 0∼300 s. In order to evaluate the impregnated state, cross sectional observation was performed with an optical microscope. Specimen cross-section was polished and finished with alumina slurry for a clear observation. The images observed were processed through image processing software to obtained impregnation ratio which defined as the resin impregnation area to the cross-sectional area of a fiber yarn. Resin impregnation was accelerated with molding temperature and pressure. At molding temperature more than 410 °C, resin impregnation was similar irrespective of temperature. Tensile test results indicated that modulus and strength increased with resin impregnation. Resin impregnation during molding was predicted using the analytical model based on Darcy’s law and continuity condition. The analysis could successfully predict the impregnation behavior despite the difference in molding pressure and temperature.
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Yoshizaki, Risa, Kim Tae Sung, Atsushi Hosoi, and Hiroyuki Kawada. "Mechanical Properties of Densified Untwisted Carbon Nanotube Yarn / Epoxy Composites." In ASME 2015 International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/msec2015-9342.

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Carbon nanotubes (CNTs) have very high specific strength and stiffness. The excellent properties make it possible to enhance the mechanical properties of polymer matrix composites. However, it is difficult to use CNTs as the reinforcement of long fibers because of the limitation of CNT growth. In recent years, a method to spin yarns from CNT forests has developed. We have succeeded in manufacturing the unidirectional composites reinforced with the densified untwisted CNT yarns. The untwisted CNT yarns have been manufactured by drawing CNTs through a die from vertically aligned CNT arrays. In this study, the densified untwisted CNT yarns with a polymer treatment were fabricated. The tensile strength and the elastic modulus of the yarns were improved significantly by the treatment, and they were 1.9 GPa and 140 GPa, respectively. Moreover, the polymer treatment prevented the CNT yarns from swelling due to impregnation of the matrix resin. Finally, the high strength CNT yarn composites which have higher volume fraction than a conventional method were successfully fabricated.
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Saito, Takeshi, Ryo Morimoto, Masaru Imamura, Akio Ohtani, and Asami Nakai. "Dimensional and Internal Structural Design for Braided Fabric Reinforced Thermoplastic Composite." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-64416.

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The braided fabrics are one of the typical textiles and have been expected to be an excellent performs for the reinforcements of composite materials. Fig.1 shows schematic drawing of a braided fabric. Braided fabrics are composed of Braided Yarns (BY) oriented diagonally and Middle End Yarns (MEY) inserted into the fabric in longitudinal direction. In previous study, it was clarified that the internal structures for the braided fabric were decided with 4 parameters; area and cross-sectional shape of braiding yarns, the braiding angle and distance between braiding yarns. And it have been suggested that internal structural parameters for braided fabric reinforced composites with thermo-setting resin are possible to be predicted. However in the case of braided composites with thermoplastic resin, impregnation mechanism of thermoplastic resin with solid state is completely different from that of thermosetting resin with liquid state. In order to predict internal structures of braided composites with thermoplastic resin, it is necessary to investigate the impregnation process or mechanism of thermoplastic resin in to fiber bundles apply enough heat on thermoplastic resin to be liquid state for good impregnation especially in the case of intermediate material such as comingled yarn, and etc. The purpose of this study is to predict the relationship between dimensional and internal structural parameters for braided fabric reinforced thermoplastic composite. The braided fabric was fabricated with intermediate material such as commingled yarns. During molding with heat and pressure, effect of molding time on the mechanism of impregnation and internal structural parameters were investigated.
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Aljewifi, H., X. B. Zhang, and J. Li. "Exprimental and analytical investigation of influence hemp yarn impregnation on pull-out behaviour." In 2014 International Conference on Composite Materials & Renewable Energy Applications (ICCMREA). IEEE, 2014. http://dx.doi.org/10.1109/iccmrea.2014.6843806.

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Veiga, Jose´, Carlos D. Gira˜o, and Carlos F. Cipolatti. "The Influence of Different Braided Packing Materials and Number of Rings on Stem Torque and Sealability." In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-77467.

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This paper introduces a test device and a protocol that simulates packing performance in different size valve stuffing boxes and stems. This test device enables measurement of braided packing compression, relaxation, axial force at the bottom of the stuffing box, the torque generated upon stem turning and the influence of the number of packing rings on stem torque. It also enables comparisons between different braiding yarns materials, impregnations and correlations with seating stress, stem torque and sealability. Test results showing these comparisons and correlations are reported.
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Murakami, Masuo, Yuqiu Yang, and Hiroyuki Hamada. "Mechanical Properties of Jute/PLA Injection Molded Products-All Natural Composites." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-62819.

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Natural composites have been important materials system due to preservation of earth environments. Natural fibers such as jute, hemp, bagasse and so on are very good candidate of natural composites as reinforcements. On the other hand regarding matrix parts thermosetting polymer and thermoplastic polymer deriver form petrochemical products are not environmental friendly material, even if thermoplastic polymer can be recycled. In order to create fully environmental friendly material (FEFM) biodegradable polymer which can be deriver from natural resources is needed. Therefore poly(lactic acid) (PLA) polymer is very good material for the FEFM. However, PLA is very brittle polymer, so that polymer chemists have been made the efforts to make tough PLA. In this paper Jute/PLA composites was fabricated by injection moldings and mechanical properties were measured. It is believable that industries will have much attention to FEFM, so that injection molding was adopted to fabricate the composites. Long fiber pellet pultrusion technique was adopted to prepare jute fiber-PLA pellet (Jute/PLA). Because it is a new method which is able to fabricate composite pellets with relative long length fibers for injection molding process, where, jute yarns were continuously pulled and coated with PLA resin. Here two kinds of PLA materials were used including the one with mold releasing agent and the other is without it. After pass through a heated die whereby PLA resin impregnates into the jute yarns and sufficient cooling, the impregnated jute yarns were cut into pellets. Then Jute/PLA pellets were fed into injection machine to make dumbbell shape specimens. In current study, the effects of temperature of heat die i.e. impregnation temperature and the kind of PLA were focused to get optimum molding condition. The volume fractions of jute fiber in pellet were measured by several measuring method including image analyzing, density measurement and dissolution methods. And the mechanical property were investigated by tensile and Izod testing. It is found that 250 degree is much suitable for Jute/PLA long fiber pultrusion process. Additionally the jute fibers seem much effective to increase the tensile modulus and the Izod strength. That is to say, the addition of Jute fiber in PLA, the brittle property can be improved.
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