Bibliographies thématiques / Experimentation on yarns and composite materials

Littérature scientifique sur le sujet « Experimentation on yarns and composite materials »

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Publié le 4 mai 2024

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Articles de revues sur le sujet "Experimentation on yarns and composite materials"

Yazdanshenas, Mohammad Esmail, Rogheih Damerchely, Abo Saied Rashidi et Ramin Khajavi. « Bioactive Nano-Composite Multifilament Yarns ». Journal of Engineered Fibers and Fabrics 7, n^o 1 (mars 2012) : 155892501200700. http://dx.doi.org/10.1177/155892501200700108.

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Physical, mechanical and antimicrobial properties of nylon 6 (polycaprolactam) doped with different amounts of silver nanoparticles were investigated in this study. Two series of filament yarns counts (20 and 70 Denier) were produced by melt spinning method with different amounts of silver nanoparticles contents (0, 0.5, 1 and 4 wt%). Elemental analysis of silver and titanium dioxide (present in polymer as delustering agent) was carried out by energy dispersive X-ray (EDX) and inductively coupled plasma mass spectrometry (ICP-MS) methods. Tensile testing, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and differential scanning calorimetry (DSC) were used to characterize the yarns. Antimicrobial activities were quantitatively evaluated against Escherichia Coli (gram-negative) and Staphylococcus Aureus (gram-positive) bacteria. The doped nylon 6 fibers showed a well dispersed distribution of silver nanoparticles. Yarns with 0.5–1.0 wt% of silver nanoparticle content were found to have improved physical and mechanical properties, as well as, significant antimicrobial activity.

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Demircan, Ozgur, Shinsuke Ashibe, Tatsuya Kosui et Asami Nakai. « Modeling of tensile and bending properties of biaxial weft knitted composites ». Science and Engineering of Composite Materials 22, n^o 3 (1 mai 2015) : 303–13. http://dx.doi.org/10.1515/secm-2013-0274.

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AbstractWithin the scope of experiments, the effect of aramid and glass yarns as stitch and biaxial (warp and weft) yarns in the biaxial weft knitted (BWK) composite was compared. After production of four types of composite panel using the hand lay-up method, the tensile and bending properties of the BWK composites were investigated both experimentally and numerically. The composite with the glass stitch and biaxial yarns exhibited higher tensile and bending properties than did the composite with the aramid stitch and biaxial yarns. The good agreement between the experimental results and the numerical results validated the applicability of the finite-element method for the BWK composites. The laminate beam theory was utilized as another modeling method for calculation of the bending modulus.

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Qi, Ye Xiong, Jia Lu Li et Liang Sen Liu. « Bending Properties of Three-Layer Biaxial Weft Knitted Fabric Reinforced Composite Materials ». Advanced Materials Research 295-297 (juillet 2011) : 1217–20. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.1217.

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In this paper, three-layer biaxial weft knitted fabric(TBWK) made of carbon fiber as inserted yarns and polyester yarns as knitted yarns , which is a kind of non-crimp fabric, has been impregnated with epoxy via RTM technique. The bending properties of the TBWK fabric reinforced composite materials with different fiber volume fraction have been investigated. The bending strength of TBWK reinforced composites with fiber volume fraction of 48.8% can reach 821.1 MPa. The results show that this kind of composites has good bending properties, and load - deflection curve shows obvious linear features.

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RAIMONDO, L., et M. H. ALIABADI. « MULTISCALE PROGRESSIVE FAILURE ANALYSIS OF PLAIN-WOVEN COMPOSITE MATERIALS ». Journal of Multiscale Modelling 01, n^o 02 (avril 2009) : 263–301. http://dx.doi.org/10.1142/s1756973709000141.

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The paper presents an overview of multiscale modeling of advanced fibrous composite materials. Following the review, a nonlinear, fully three-dimensional, numerical model is proposed which is suitable for multiscale elastic and progressive failure analysis of plain-woven composite materials. The proposed model is developed for implementation into the Finite Element code ABAQUS/Explicit as a user-defined subroutine for constant stress (one integration point) solid elements. The multiscale strategy applied in this paper uses a closed-form solution approach for homogenization of the mesoscale properties of a woven composite. A mosaic model of the woven composite's Representative Volume Element (RVE) is used for deriving the micromechanical relations used for homogenization. The composite RVE model used herein is composed of UD interlacing yarns (fill and warp yarns) and matrix-rich regions. For failure and damage analysis, the following features are implemented in this work: material nonlinearity for pure in-plane shear deformation; physically-based failure criteria for matrix failure in the UD yarns; maximum stress failure criteria for failure of fibers in the UD yarns and of the pure matrix in the resin-rich regions and energy-based damage mechanics. The proposed strategy, which has been implemented and tested for a special case of an in-plane damage, has some evident advantages compared to the other approaches, especially for application to full-scale simulations, i.e., component and structural scales. A comparison of the proposed model with experimental data shows a good correlation can be achieved.

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Sarioğlu, Esin, et Osman Babaarslan. « A Study on Physical Properties of Microfilament Composite Yarns ». Journal of Engineered Fibers and Fabrics 11, n^o 3 (septembre 2016) : 155892501601100. http://dx.doi.org/10.1177/155892501601100310.

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In the textile industry, composite yarns with multifilament cores are used to impart strength. There are various spinning systems to produce composite core-spun yarns. In this study, to determine the effects of filament fineness on yarn characteristics of composite yarns, polyester filaments with medium, fine and micro fiber linear densities were used as the core portion and cotton fiber was used as the sheath material. Yarn samples were manufactured using a modified ring spinning system with four different yarn counts and constant twist factor (ae). The effect of filament linear density on yarn tensile properties, unevenness and imperfections was determined. Yarn evenness and tensile properties were compared with 100% cotton ring spun yarn and to each other. When relative amount of core increases, it was observed that composite yarns had improved tenacity and elongation compared to 100% cotton ring spun yarn. Although filament fineness was found to have a significant effect on the CVm % properties, there was no statistical effect on imperfections other than yarn count parameter.

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Wang, Yu, Xuejiao Li, Junbo Xie, Ning Wu, Yanan Jiao et Peng Wang. « Numerical and Experimental Investigation on Bending Behavior for High-Performance Fiber Yarns Considering Probability Distribution of Fiber Strength ». Textiles 3, n^o 1 (18 février 2023) : 129–41. http://dx.doi.org/10.3390/textiles3010010.

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The performance of fiber-reinforced composite materials is significantly influenced by the mechanical properties of the yarns. Predictive simulations of the mechanical response of yarns are, thus, necessary for fiber-reinforced composite materials. This paper developed a novel experiment equipment and approach to characterize the bending behavior of yarns, which was also analyzed by characterization parameters, bending load, bending stiffness, and realistic contact area. Inspired by the digital element approach, an improved modeling methodology with the probability distribution was employed to establish the geometry model of yarns and simulated bending behavior of yarns by defining the crimp strain of fibers in the yarn and the effective elastic modulus of yarns as random variables. The accuracy of the developed model was confirmed by the experimental approach. More bending behavior of yarns, including the twisted and plied yarns, was predicted by numerical simulation. Additionally, models revealed that twist level and number of plies affect yarn bending properties, which need to be adopted as sufficient conditions for the mechanical analysis of fiber-reinforced composite materials. This efficient experiment and modeling method is meaningful to be developed in further virtual weaving research.

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Huang, Chien-Lin, Yu-Tien Huang, Ting-Ting Li, Chia-Hsuan Chiang, Ching-Wen Lou et Jia-Horng Lin. « Composite processing and property evaluation of far-infrared/electromagnetic shielding bamboo charcoal/phase change material/stainless steel elastic composite fabrics ». Journal of Polymer Engineering 36, n^o 2 (1 mars 2016) : 211–20. http://dx.doi.org/10.1515/polyeng-2015-0080.

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Abstract This study aims to fabricate far-infrared (FIR)/electromagnetic shielding composite fabric and its composite yarn. Five types of composite yarns with different sheath components were made by using bamboo charcoal (BC) fibers, phase change material (PCM) roving and stainless steel (SS) fibers via a ring spinning frame, and then fabricated into five elastic warp-knitted fabrics with different weft yarns using a crochet knitting machine. The mechanical properties of different constituents of composite yarns and their fabrics, as well as FIR emissivity and electromagnetic shielding effectiveness (EMSE) of resulting fabrics were evaluated. The results show that BC/SS composite yarns and their fabricated warp-knitted fabrics display the highest tensile strength. Warp-knitted fabrics containing BC fibers possess the highest FIR emissivity. EMSE of the fabricated warp-knitted fabrics improves proportionally with the number of the lamination layers. The resulting multifunctional elastic knitted fabrics apply as athletic clothing, underwear, socks, protective or healthcare products in the future.

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Yalcinkaya, Fatma, Michal Komarek, Daniela Lubasova, Filip Sanetrnik et Jiri Maryska. « Preparation of Antibacterial Nanofibre/Nanoparticle Covered Composite Yarns ». Journal of Nanomaterials 2016 (2016) : 1–7. http://dx.doi.org/10.1155/2016/7565972.

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The antibacterial efficiency of nanofibre composite yarns with an immobilized antibacterial agent was tested. This novel type of nanofibrous composite material combines the good mechanical properties of the core yarn with the high specific surface of the nanofibre shell to gain specific targeted qualities. The main advantages of nanofibre covered composite yarns over the standard planar nanofibre membranes include high tensile strength, a high production rate, and their ability to be processed by standard textile techniques. The presented paper describes a study of the immobilization of an antibacterial agent and its interaction with two types of bacterial colonies. The aim of the study is to assess the applicability of the new composite nanomaterial in antibacterial filtration. During the experimental tests copper(II) oxide particles were immobilized in the polyurethane and polyvinyl butyral nanofibre components of a composite yarn. The antibacterial efficiency was evaluated by using both Gram-negativeEscherichia coliand Gram-positiveStaphylococcus gallinarumbacteria. The results showed that the composite yarn with polyvinyl butyral nanofibres incorporating copper(II) oxide nanoparticles exhibited better antibacterial efficiency compared to the yarn containing the polyurethane nanofibres. The nanofibre/nanoparticle covered composite yarns displayed good antibacterial activity against a number of bacteria.

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Jaouachi, B., M. Ben Hassen et F. Sakli. « STRENGTH OF WET SPLICED DENIM YARNS AFTER SIZING USING A CENTRAL COMPOSITE DESIGN ». AUTEX Research Journal 7, n^o 3 (1 septembre 2007) : 159–65. http://dx.doi.org/10.1515/aut-2007-070302.

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Abstract The retained strength of wet spliced yarns can be controlled to some extent by suitable choices of certain factors related to the process. In order to understand how these variables influence the breaking force of wet spliced yarns, a central composite design was formulated and three variables - yarn count, the duration of air joining and the duration of water joining - were considered. Analysis of the results indicates that yarn count and length of splice contribute significantly to this mechanical property of wet sized spliced yarns. The duration of water joining, the duration of air joining of splice and the recipe size have a considerable effects.

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Matsumoto, Hidetoshi, Shinji Imaizumi, Yuichi Konosu, Minoru Ashizawa, Mie Minagawa, Akihiko Tanioka, Wei Lu et James M. Tour. « Electrospun Composite Nanofiber Yarns Containing Oriented Graphene Nanoribbons ». ACS Applied Materials & ; Interfaces 5, n^o 13 (26 juin 2013) : 6225–31. http://dx.doi.org/10.1021/am401161b.

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Thèses sur le sujet "Experimentation on yarns and composite materials"

Roiron, Coline. « Contribution à la caractérisation thermomécanique d’un polyéthylène auto-renforcé et de ses « recyclats » : Effet des paramètres du procédé de moulage par compression ». Electronic Thesis or Diss., Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique, 2022. http://www.theses.fr/2022ESMA0004.

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Réduire la consommation énergétique est un enjeu essentiel pour la société actuelle. Pour opérer une transition énergétique durable, en particulier dans le domaine des transports, de nouvelles réglementations plus exigeantes sont mises en place. Augmenter la proportion de matériaux recyclés et recyclables ainsi qu'alléger les pièces de structures sont les maitres-mots.L'emploi de polymères peut être une solution mais pour garantir une bonne tenue mécanique, le recours à des composites auto-renforcés (SRP : Self-Reinforced Polymer) constitue un levier d'action. Ils sont composés d'un polymère ou d'une famille de polymères sous deux états physiques, un pour former la matrice et le second pour le renfort. Ils présentent alors une faible densité,une tenue mécanique intéressante et une recyclabilité accrue. Pour appréhender le comportement d'un polyéthylène auto-renforcé,et pouvoir ainsi envisager l'utilisation de ce matériau pour une application donnée, comprendre le comportement de chacun des éléments qui le constitue est primordial.Si le comportement de composites plus conventionnels, comme des composites à matrice thermoplastique renforcée de fibres de verre ou de carbone est bien maitrisé, exploiter des renforts thermoplastiques tels que l'UHMWPE (Ultra-High Molecular Weight PolyEthylene) au sein de composite, complexifie la compréhension du comportement des SRP. L'impact de la température et du temps sur la réponse mécanique des renforts est alors examiné dans un premier temps, et les observations sont reliées à des considérations microstructurales. Un protocole d'essai a été proposé et validé au préalable. Une transition de phase solide est mise en évidence autour de 49°C et engendre un changement abrupt de comportement.Ces renforts UHMWPE sont intégrés au sein de composites et un procédé de moulage par compression est suggéré pour les mettre en œuvre en une seule étape à partir d'une matrice sous forme de granulés. L'effet des différents paramètres du procédé est évalué pour pouvoir proposer une combinaison optimale. La réponse mécanique en traction et en fluage à court et long termes est ensuite analysée et l'intérêt des SRPE ainsi conçus est mis en évidence. En effet, le bénéfice de son utilisation est clair, notamment à basse température.Par ailleurs, la présence de renforts thermoplastiques semble introduire des paramètres supplémentaires qui affectent le comportement des composites et en particulier en fluage. La caractérisation précise et la connaissance des températures de transition de ces derniers sont alors apparues déterminantes, à plus forte raison étant donné que les transitions dépendent de la microstructure du renfort et donc du type d'étirage et des conditions appliquées. Enfin, la recyclabilité des composites mis en œuvre est étudiée puisqu'elle constitue un moteur pour le développement des SRP sur le marché
Reducing energy consumption is an essential issue for today's society. In order to achieve a sustainable energy transition, especially in the field of transportation, new and more demanding regulations are being implemented. The keywords are to increase the proportion of recycled and recyclable materials and lightening structural parts.The use of polymers can be a solution. However, to guarantee good mechanical resistance, the use of self-reinforced composites(SRP) is a lever for action. They are composed of a polymer or a family of polymers in two physical states, one to form the matrix and the second for the reinforcement. They present a low density, interesting mechanical behavior, and increased recyclability. To understand the behavior of a self-reinforced polyethylene and to be able to consider the use of this material for a given application,it is essential to understand the behavior of each of its components. If the behavior of more conventional composites, such as glass or carbon fiber reinforced thermoplastic matrix composites, is well understood, using thermoplastic reinforcements such as UHMWPE (Ultra-High Molecular Weight PolyEthylene) within the composite makes the understanding of the behavior of SRP more complex. The impact of temperature and time on the mechanical response of the reinforcements is then examined in a first step, and the observations are related to microstructural considerations. A test protocol has been proposed and validated before hand. A solid-phase transition is highlighted around 49°C and generates an abrupt behavior change.These UHMWPE reinforcements are integrated into composites. A compression molding process is suggested to process them in a single step from a matrix in granular form. The effect of different process parameters is evaluated to propose an optimal combination.The short and long-term mechanical response in tension and creep is then analyzed, and the interest of the SRPE thus designed is highlighted. Indeed, the benefit of its use is evident, especially at low temperatures. Moreover, the presence of thermoplastic reinforcements seems to introduce additional parameters that affect the behavior of the composites and, in particular, in creep. The precise characterization and the knowledge of the transition temperatures of the latter appeared then determining, mainly since the transitions depend on the microstructure of the reinforcement and thus on the type of stretching and the applied conditions. Finally, the recyclability of the implemented composites is studied since it constitutes a driving force for the development of SRP on the market

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POLVERINO, SALVATORE. « Graphene-based construction materials : experimentation and application development ». Doctoral thesis, Università degli studi di Genova, 2021. http://hdl.handle.net/11567/1058131.

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The construction sector is entering the new era of production, construction and management of Industry 4.0. The development of smart and resilient technologies focused on the user and the environment has significant potential to improve the ways of experiencing indoor and outdoor spaces. This scenario generates new opportunities to exploit innovation to create the conditions for human well-being and to contribute to the future of the Earth. The construction sector is in a period of transition. On the one hand, there is a demand for construction with high technological content, capable of incorporating innovations at low cost, low environmental impact, low energy consumption, safe and resilient, adaptable, convertible, transformable over time and personalised; on the other hand, there is a continued reliance on traditional building approaches/solutions that only partially meet the new requirements. In this context, the research into new materials to produce innovative construction components capable of contributing to the achievement of the above-mentioned objectives is one of the areas of contemporary development. Among them are included two-dimensional materials that owe their name to their particular structure, consisting of a single atomic layer. The event that enabled such a reduction in the size scale was the isolation of graphene, a material with unique properties and numerous possible applications. Its potential uses are currently being studied and tested, as demonstrated by the numerous research programmes on the subject, aimed at transferring technology from research laboratories to industry. This PhD research aims to investigate the potential applications of graphene in the field of cementitious composites and polymer-based coatings. The activities carried out included: a critical analysis of the state of the art of the most recent applications in the field of construction; the consequent choice of possible composite materials graphene and graphene-related materials based; the design and development of an experimental campaign; the proposal and final verification of the applications in the construction sector. The activities were carried out in collaboration with the Graphene Labs of the Italian Institute of Technology (IIT).

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Garrett, Joseph Daniel. « Experimentation of Mode I and Mode II Fracture of Uni-Directional Composites and Finite Element Analysis of Mode I Fracture Using Cohesive Contact ». DigitalCommons@CalPoly, 2016. https://digitalcommons.calpoly.edu/theses/1670.

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As the use of fiber-reinforced composites has increased over the decades, so has the need to understand the complexity of their failure mechanisms as engineers seek to improve the damage tolerance of composite laminated structures. One of the most prevalent and limiting mode of failure within composite laminates is delamination, since it not only reduces a structures stiffness and strength, but can be very difficult to detect without the use of special non-destructive equipment. Industry testing organizations have utilized several fracture tests in order to characterize the fracture toughness of composite materials under different loading conditions. For this research, ASTM D5528, ASTM D7905 & 4ENF tests were performed to evaluate the fracture resistance of uni-directional pre-preg laminates; the 4ENF was used to compare its effectiveness as to ASTM D7905. Finite element methods such as the use of cohesive elements have been developed to simulate delamination within composite laminates. While there has been much work in evaluating the effectiveness of cohesive elements, very little exists within literature as to studying the success of cohesive surface contact for accurately modeling coupon level fracture testing. Cohesive contact interaction in Abaqus/Standard was used to simulate the mode I double cantilever beam (DCB) experiment of ASTM D5528. Cohesive contact was found to accurately and efficiently model DCB testing as the critical load- displacement values and steady state fracture agreed with experimental data. A parametric study was performed and found that cohesive contact was less sensitive in varying key model parameters than that commonly expected of cohesive elements.

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Abdul, Ghafour Tarek. « Analyse des irréversibilités lors de la mise en forme des renforts de composites ». Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEI083/document.

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Dans le contexte industriel de la mise en forme des matériaux composites à renforts fibreux, l’outil de simulation est devenu partie intégrante de l’amélioration des procédés. Aujourd’hui, les simulations numériques de la mise en forme des renforts fibreux sont pour la plupart basées sur une approche macroscopique et des modèles de matériaux continus dont on suppose que le comportement est non linéaire élastique, donc réversible. Or on sait que sous chargement non-monotones (charges et décharges), les renforts fibreux montrent d’importantes irréversibilités, liées notamment aux glissements entre mèches et entre fibres. La première partie de ce travail consiste à caractériser l’importance des irréversibilités par des tests de charges/décharges à l’échelle macroscopique en différents modes de déformation (flexion, cisaillement, compression) réalisés sur des renforts tissés. La seconde partie consiste à chercher des modèles de comportement qui décrivent l’anélasticité en flexion et en cisaillement et à les implémenter dans un code éléments finis. Une validation de ces modèles obtenus est faite par comparaison simulation-expérimentation des essais d’identification de flexion et de cisaillement plan. Cette partie est réalisée sur le logiciel PlasFib développé par l’INSA de Lyon, un code éléments-finis explicite en grande transformation proposant une approche macroscopique semi-discrète des renforts fibreux. La troisième partie consiste à simuler différents cas de mises en forme inspirées de pièces industrielles pour mettre en évidence les zones du renfort qui subissent des chargements non monotones (en flexion et en cisaillement) lors d’une mise en forme. Cela vise également à étudier l’importance de l’utilisation des modèles irréversibles pour simuler ces mises en forme en comparant les résultats des simulations obtenus avec des modèles de comportement réversibles avec ceux obtenus pour des modèles irréversibles
In the industrial context of shaping composite materials with fibrous reinforcements, the numerical simulation tool has become an integral part of process improvement. Today, numerical simulations of shaping fibrous reinforcements are mostly based on a macroscopic approach and continuous material models that have been assumed to be nonlinear elastic, thus reversible. However, under non-monotonous loading paths, the fibrous reinforcement shows significant irreversibility, particularly related to sliding between yarns and between fibers. First of all, we will try to characterize the importance of irreversibilities by cyclic tests (bending, in-plan shearing, compression) carried out on woven reinforcements. The second part consists in looking for behavior models that describe bending and in-plane shear irreversibilities to implement them in a finite element code. A validation of these behavior models is made by comparing simulation and experimental results of bending and in-plane shear identification tests. This part is realized on PlasFib, a software developed by INSA Lyon, based on finite element code in large deformation, proposing a macroscopic semi-discrete approach of fibrous reinforcements. The third part of the study will consist in simulating the shaping process of different industrial parts (or inspired by industrial parts). This will aim first at identifying loading cases apt to produce non-monotonous loading paths (in bending and in-plane shear) during the shaping process ; and second, at studying the importance of using irreversible models to simulate these shaping processes by comparing the results of simulations obtained with reversible behavior models with those obtained for irreversible behavior models

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Gaumond, Baptiste. « Compréhension des interfaces / interphases formées dans les composites PPS / fibres de carbone et PPS / fibres de basalte réalisés à partir de mèches comélées et retordues ». Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEI064.

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Ces travaux de thèse sont consacrés à la compréhension des relations structures-propriétés des matériaux composites réalisés à partir de mèches hybrides composées de la matrice thermoplastique, le polysulfure de phénylène et de renforts qui peuvent être soit du carbone soit du basalte. Plusieurs axes de recherche ont été approfondis dans ces travaux : i) l’impact des procédés de fabrication des mèches sur les propriétés finales des composites, ii) la compréhension des interactions fibres-matrice dans les systèmes étudiés et iii) l’optimisation de ces interactions à l’interphase. Ces travaux ont démontré le lien établi entre les propriétés mécaniques et structurelles des mèches hybrides et les propriétés finales des matériaux composites obtenus. Le procédé de comélage par air conditionne en partie les propriétés finales des composites en diminuant les propriétés mécaniques des fibres de renfort. Cette dégradation n’est pas observée pour le procédé de retordage. Dans le même temps, les composites obtenus par comélage sont de meilleure qualité en termes d’homogénéité, propriétés mécaniques et taux de porosité par rapport à ceux issus du procédé de retordage. Dans un second temps, l’adhérence de l’ensemble des systèmes étudiés a été évaluée à l’échelle micromécanique et corrélée à l’échelle macroscopique. Des essais de vieillissement accélérés ont également été conduits pour discriminer les solutions les plus durables. Une dernière partie de ces travaux est consacrée à l’optimisation des propriétés interfaciales des systèmes étudiés. Les deux voies explorées ont donné des résultats intéressants : l’utilisation d’un mélange polymère PPS / PE-EMA-GMA a permis d’améliorer jusqu’à 56 % l’IFSS avec les fibres de basalte et l’utilisation d’un sel imidazolium en tant qu’agent interfacial dans la matrice a permis d’améliorer de 25 % l’IFSS obtenu avec les fibres de carbone
This thesis work is devoted to the understanding of the structure-properties relationships of composite materials made from hybrid rovings composed of the thermoplastic matrix, polyphenylene sulphide, and reinforcements that can be either carbon or basalt. Thus, several lines of research have been pursued in this work: i) the impact of the commingling process on the final properties of composites, ii) the understanding of fiber-matrix interactions and iii) the optimization of those interactions in the interface. This work first demonstrated the link established between the mechanical and structural properties of the hybrid yarns and the mechanical properties of composite materials. The air commingling process degrades the resistance of the fibers and this is observed both on filaments tensile tests and commingled yarns. This degradation is not observed on twisted yarns. In the same time, composites based on commingled yarns show a better homogeneity, mechanical properties and a lower porosity rate. In a second step, the adhesion developped in all composite systems was evaluated at the micromechanical scale and correlated at the macroscopic scale. Accelerated ageing tests were also carried out to discriminate the most durable solutions. A final part of this work is devoted to the optimization of the interfacial properties of the systems studied. Two solutions were developed and gave interesting results: the use of a PPS / PE-EMA-GMA polymer mixture allowed to improve up to 56% the IFSS with basalt fibers and the use of an imidazolium salt as interfacial agent in the matrix allowed to improve by 25% the IFSS obtained with carbon fibers

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Livres sur le sujet "Experimentation on yarns and composite materials"

Effects of material degradation on the structural integrity of composite materials : Experimental investigation and modeling of high temperature degradation mechanisms : final report for grant NAG3-1760. [Washington, DC : National Aeronautics and Space Administration, 1996.

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Chapitres de livres sur le sujet "Experimentation on yarns and composite materials"

Mäder, Edith, Christina Rothe, Harald Brünig et Thomas Leopold. « Online Spinning of Commingled Yarns-Equipment and Yarn Modification by Tailored Fibre Surfaces ». Dans Advances in Composite Materials and Structures, 229–32. Stafa : Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-427-8.229.

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Romani, Alessia, Raffaella Suriano, Andrea Mantelli, Marinella Levi, Paolo Tralli, Jussi Laurila et Petri Vuoristo. « Composite Finishing for Reuse ». Dans Systemic Circular Economy Solutions for Fiber Reinforced Composites, 167–90. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-22352-5_9.

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AbstractCoating processes are emerging for new applications related to remanufactured products from End-of-Life materials. In this perspective, their employment can generate interesting scenarios for the design of products and solutions in circular economy frameworks, especially for composite materials. This chapter would give an overview of coating design and application for recycled glass fiber reinforced polymers on the base of the experimentation made within the FiberEUse project. New cosmetic and functional coatings were developed and tested on different polymer composite substrates filled with mechanically recycled End-of-Life glass fibers. Afterwards, recycled glass fiber reinforced polymer samples from water-solvable 3D printed molds were successfully coated. Finally, new industrial applications for the developed coatings and general guidelines for the coating of recycled glass fiber reinforced polymers were proposed by using the FiberEUse Demo Cases as a theoretical proof-of-concept.

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Alagirusamy, R., et A. Das. « Yarns : Production, processability and properties ». Dans Fibrous and Composite Materials for Civil Engineering Applications, 29–61. Elsevier, 2011. http://dx.doi.org/10.1533/9780857095583.1.29.

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Chevalier, C., C. Kerisit, A. Klavzar, F. Boussu et D. Coutellier. « Measurements of dynamic properties of ballistic yarns using innovative testing devices ». Dans Advanced Fibrous Composite Materials for Ballistic Protection, 199–215. Elsevier, 2016. http://dx.doi.org/10.1016/b978-1-78242-461-1.00007-8.

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Bose, Goutam Kumar, et Pritam Pain. « Surface Response Methodology Approach for Multi-Objective Optimization During Electrochemical Grinding of Al2O3/Al Interpenetrating Phase Composite ». Dans Handbook of Research on Manufacturing Process Modeling and Optimization Strategies, 162–92. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-2440-3.ch008.

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Now a day the advances in the material science lead to the development of advanced engineering materials like super alloys. The current research work focus on the selection of significant machining parameters initially depending on single objective and then multi objective responses, while machining alumina-aluminum interpenetrating phase composites during electrochemical grinding. Control parameters such electrolyte concentration (C), voltage (V), depth of cut (D) and electrolyte flow rate (F) have been considered for experimentation. Initially single objective optimal parametric setting is generated from Taguchi Methodology and Regression analysis. Further it is optimize using Response Surface Methodology. The contradictory responses like higher material removal rate (MRR), lower surface roughness (Ra), lower overcut (OC) and lower cutting force (Fc) are ensured by using Overlaid contour plots and Desirability functions. These soft computing techniques corroborates well during the parametric optimization of electrochemical grinding process.

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Leticia, OGURI, ESCOBAR Marlem Guadalupe, PRETEL Ana María et GARCIA Nidia Miriam. « Ecological panel based on plastic aggregates, natural fibers, and plaster ». Dans Handbook Science of Technology and Innovation, 49–64. ECORFAN, 2022. http://dx.doi.org/10.35429/h.2022.3.49.64.

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Today, there is a growing need for alternative construction technologies that allow, among other things, to reduce of plastic waste and energy consumption during the life cycle of buildings. In this context, this article presents the partial results of a research project whose objective is to develop an innovative solution for plasterboard with plastic aggregates such as pet and Ixtle natural fibers. This solution is based on a plasterboard made with a mixture of eco-efficient composite materials. The composite material used in the production of the plates or panels results from the combination of two industrial by-products: commercial plaster; crushed or laminated pet, and natural “ixtle” textile fibers resulting from the “carving” process of the maguey leaves. In addition to the raw materials, the innovation of the solution also results from new future proposals for experimentation with different recycling materials. In this work, details of the process of elaboration of the plates and both the optimization of the composition of the material and the construction technology are provided, within the long strategies, the tests and validation of the mixtures will be carried out for the elaboration of plates from the point of view of mechanical, thermal and acoustic behavior, which from the results obtained can be concluded in the feasibility that meets all the structural stability requirements suitable for this type of construction element.

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Actes de conférences sur le sujet "Experimentation on yarns and composite materials"

Lagoudas, Natasha C., et Zoubeida Ounaies. « Electrospinning of continuous piezoelectric yarns for composite application ». Dans The 15th International Symposium on : Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring, sous la direction de Marcelo J. Dapino et Zoubeida Ounaies. SPIE, 2008. http://dx.doi.org/10.1117/12.790447.

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Hernandez, Corey D., Mei Zhang, Shaoli Fang, Ray H. Baughman, Thomas S. Gates et Seun K. Kahng. « Multifunctional Characteristics of Carbon Nanotube (CNT) Yarn Composites ». Dans ASME 2006 Multifunctional Nanocomposites International Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/mn2006-17028.

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By forming composite structures with Carbon Nanotube (CNT) yarns we achieve materials capable of measuring strain and composite structures with increased mechanical strength. The CNT yarns used are of the 2-ply and 4-ply variety with the yarns having diameters of about 15–30 μm. The strain sensing characteristics of the yarns are investigated on test beams with the yarns arranged in a bridge configuration. Additionally, the strain sensing properties are also investigated on yarns embedded on the surface of a flexible membrane. Initial mechanical strength tests also show an increase in the modulus of elasticity of the composite materials while incurring a weight penalty of less than one-percent. Also presented are initial temperature characterizations of the yarns.

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Saito, Takeshi, Ryo Morimoto, Masaru Imamura, Akio Ohtani et Asami Nakai. « Dimensional and Internal Structural Design for Braided Fabric Reinforced Thermoplastic Composite ». Dans 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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Rahy, A., Changheon Kim, Sungwoo Ryu, Jaewon Hwang, Soon Hyung Hong et D. J. Yang. « Novel and versatile process for the preparation of polyvinyl alcohol composite carbon nanotube fibers/yarns ». Dans 2011 IEEE Nanotechnology Materials and Devices Conference (NMDC 2011). IEEE, 2011. http://dx.doi.org/10.1109/nmdc.2011.6155344.

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EVERS, CECIL, KAYLEE THAGARD et JIN GYU PARK. « SCALABLE HIGH TENSILE MODULUS COMPOSITE LAMINATES USING CONTINUOUS CARBON NANOTUBE YARNS AND GAMMA RAY TREATMENT ». Dans Proceedings for the American Society for Composites-Thirty Eighth Technical Conference. Destech Publications, Inc., 2023. http://dx.doi.org/10.12783/asc38/36666.

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Continuous carbon nanotube (CNT) yarns are used to fabricate scalable composite laminates with high strength and stiffness for scaled-up manufacturing and potential engineering applications. CNT yarns are shown with specific tensile strengths of 1.77 N/tex due to a high degree of nanotube alignment. These properties are transferred to scalable unidirectional CNT yarn reinforced composite laminates fabricated using filament winding and aerospace resin matrices. Gamma ray treatments of 200 kGy, 700 kGy, and 1200 kGy are used to further improve the mechanical and interface properties of the constituent CNT yarns. The optimal dose is 700 kGy, yielding a specific tensile strength of 1.89 GPa/(g cm-3) and specific modulus of 258 GPa/(g cm-3), which represents a 37% and 44% improvement over the properties of the control laminate. The specific modulus exceeds current state-of-the-art unidirectional carbon fiber composite laminates. The results demonstrate an effective approach transferring high-strength CNT yarns into composites that retain the tensile performance of CNT materials at the flight article scale.

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Davis, Felecia, Julian Huang, Jimi Demi-Ajayi et Karen Kuo. « The Phototropic Fiber Composite Structure ». Dans 108th Annual Meeting Proceedings. ACSA Press, 2020. http://dx.doi.org/10.35483/acsa.am.108.35.

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THE RESEARCH QUESTION Can one make a responsive fiber composite where electronics are embedded into the fabric? A team of landscape architects and architects developed a responsive fiber composite folding structure by embedding conductive yarns into a fiberglass knit fabric. The innovation of this project resides in the introduction of simple electronic components into the fabric itself to make a smart or computational textile. This team presents the materials and design fabrication processes for the construction of a structure that ac¬knowledges the presence and absence of light.

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Uddin, Mohammed Jasim, Tarik J. Dickens, Jin Yan, David O. Olawale, Okenwa I. Okoli et Federico Cesano. « Solid-State Dye Sensitized Optoelectronic Carbon Nanotube-Wires : An Energy Harvesting Damage Sensor With Nanotechnology Approach ». Dans ASME 2012 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/smasis2012-8200.

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A novel preparation method of solid state photovoltaic carbon nanotubes (CNT) yarns has been successfully developed by depositing and grafting TiO2 thin films on CNT yarn substrates using a simple sol–gel method and designed for use in structural health monitoring (SHM) applications. The interaligned, ultrastrong and flexible CNYs display excellent electrical conductivity, mechanical integrity and their catalytic properties have been successfully used as working and counter electrodes. The TiO2 nanoparticles have been found to form a homogeneous thin film on the yarn surface, which shows efficient photovoltaic properties with remarkable stability when exposed to simulated solar light (AM 1.5). The yarns’ structure is not altered upon sol-gel treatment and light exposure. The TiO2 film is firmly anchored and the photovoltaic performance is retained even after multiple irradiation cycles. This preparation technique can also be applied to CNT yarn reinforced composite for an innovative in-situ and real-time self damage-sensing properties with infused triboluminescent (TL) materials.

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Hamila, Nahiene, Philippe Boisse et Sylvain Chatel. « Meso-Macro Simulations of Textile Composite Forming ». Dans ASME 2008 International Manufacturing Science and Engineering Conference collocated with the 3rd JSME/ASME International Conference on Materials and Processing. ASMEDC, 2008. http://dx.doi.org/10.1115/msec_icmp2008-72382.

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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.

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MADENCI, ERDOGAN, ATILA BARUT, AMIN YAGHOOBI, ZHIYANG YAO et YILE HU. « PERIDYNAMICS FOR MICROSTRUCTURAL DAMAGE MODELING OF 3D CARBON/CARBON (C/C) COMPOSITE MATERIALS ». Dans Proceedings for the American Society for Composites-Thirty Eighth Technical Conference. Destech Publications, Inc., 2023. http://dx.doi.org/10.12783/asc38/36652.

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This study presents a peridynamic model to investigate damage initiation in complex 3D C/C microstructures for optimal design and fabrication. The peridynamic theory unifies the mechanics of continuous and discontinuous media. It is a continuum approach without spatial derivatives, thus without mathematical singularities. It restores nonlocal interactions and introduces an internal length parameter (horizon of a point) which links different length scales. Because of these features, it enables autonomous multiple damage initiation sites and their complex interactions at unspecified locations along unguided paths. The numerical results concern damage initiation and growth in a complex 3D C/C microstructure. A repeating representative volume element (RVE) composed of yarns and surrounding matrix is constructed according to the periodic architecture of the 3D woven C/C composites. The analysis is conducted through a mixed implicit-explicit algorithm with GPU parallel computing. The strength properties of the constituents are used to determine the critical stretch for damage initiation and growth in the microstructure. The isolated initial micro cracks start merging as the load increases. Subsequently, the crack front reaches to the surface of a nearby fiber. However, the micro-crack cannot pass through that fiber directly. Instead, it deflects along the fiber direction and starts climbing up around the fiber lateral surface.ERDOGAN MADENCI

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Gustafson, Peter A., James R. Jastifer, John A. Kapenga et Joseph McKean. « Lack of statistical rigor in composite materials experimentation and lessons learned from the science of medicine ». Dans 55th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. Reston, Virginia : American Institute of Aeronautics and Astronautics, 2014. http://dx.doi.org/10.2514/6.2014-1201.

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