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Dissertations / Theses on the topic 'Carbon Fibres Reinforced Polymer Composite'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Salama, Adel. "Laser machining of carbon fibre reinforced polymer composite." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/laser-machining-of-carbon-fibre-reinforced-polymer-composite(7310ed95-b876-480b-a8b4-2033b4309cb6).html.

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Carbon fibre reinforced polymer (CFRP) composites have found a wide range of applications in the aerospace, marine, sports and automotive industries owing to their lightweight and acceptable mechanical properties compared to the commonly used metallic materials. The currently dominating method of machining CFRP is by mechanical means that has found many problems including extensive tool wear, fibre pull-out and delamination. Lasers as non-contact tools have been widely applied for cutting and drilling materials. However, machining of CFRP composites using lasers can be challenging due to inhom

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2

Negarestani, Reza. "Laser cutting of carbon fibre-reinforced polymer composite materials." Thesis, University of Manchester, 2010. https://www.research.manchester.ac.uk/portal/en/theses/laser-cutting-of-carbon-fibrereinforced-polymer-composite-materials(90c7dab8-2b05-4098-aee7-d90a66b9face).html.

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Carbon fibre-reinforced polymer (CFRP) composite materials are in increasingly high demand, particularly in aerospace and automotive industries for reduced fuel consumption. This is due to their superior structural characteristics (both in fatigue and static conditions) and light weight. Anisotropic and heterogeneous features of these materials, however, have posed serious challenges in machining of CFRPs. Hence new machining technologies need to be investigated. Laser is a non-contact (eliminating toolwear) thermal process. Therefore, the thermal properties of the material are of crucial impo

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3

Deng, Jiangang. "Durability of carbon fiber reinforced polymer (CFRP) repair/strengthening concrete beams." Laramie, Wyo. : University of Wyoming, 2008. http://proquest.umi.com/pqdweb?did=1663060011&sid=2&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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4

Pandolfi, Carlo. "Experimental characterization of carbon-fiber-reinforced polymer laminates." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/9777/.

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The goal of this thesis is to make static tensile test on four Carbon Fiber Reinforced Polymer laminates, in such a way as to obtain the ultimate tensile strength of these laminates; in particular, the laminates analyzed were produced by Hand Lay-up technology. Testing these laminates we have a reference point on which to compare other laminates and in particular CFRP laminate produced by RTM technology.

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5

Curnutt, Austin. "Research on the mechanics of CFRP composite lap joints." Thesis, Kansas State University, 2017. http://hdl.handle.net/2097/38191.

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Master of Science<br>Department of Architectural Engineering<br>Donald J. Phillippi<br>For this thesis, research was performed on CFRP bonded composite lap-joints with one and two continuous laminas through the lap. Composite wraps used to retrofit existing structures use lap joints to maintain their integrity. The use of composites for retrofitting structures has many advantages over traditional methods, such as steel jacketing, and is becoming more widely accepted in the structural engineering industry. While much literature exists documenting the performance of composite wraps as a whole wh

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6

Yang, Xiong. "Use of Fiber Reinforced Polymer Composite Cable for Post-tensioning Application." FIU Digital Commons, 2015. http://digitalcommons.fiu.edu/etd/2259.

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Corrosion of steel tendons is a major problem for post-tensioned concrete, especially because corrosion of the steel strands is often hard to detect inside grouted ducts. Non-metallic tendons can serve as an alternative material to steel for post-tensioning applications. Carbon fiber reinforced polymer (CFRP), given its higher strength and elastic modulus, as well as excellent durability and fatigue strength, is the most practical option for post-tensioning applications. The primary objective of this research project was to assess the feasibility of the use of innovative carbon fiber reinforce

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7

Nguyen, Phi Long. "Experimental and numerical study on thermo-mechanical behaviour of carbon fibre reinforced polymer and structures reinforced with CFRP." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSE1130/document.

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Le polymère renforcé de fibres de carbone (CFRP) est l'une des solutions courantes pour réparer/renforcer/ fortifier/ rétrofiter les structures en génie civil en raison de ses avantages dans les propriétésmécaniques, la durabilité et la maniabilité. Cependant, des problèmes d'incendie récents ont soulevédes inquiétudes quant à la performance au feu du CFRP et des structures renforcées par CFRP. Dansla littérature, il existe plusieurs études sur l'évolution de la performance mécanique de CFRP et desstructures renforcées par CFRP pendant ou après l'exposition à différents niveaux de température

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8

Cormier, Daniel. "Repair of Conductive Layer on Carbon Fibre Reinforced Polymer Composite with Cold Gas Dynamic Spray." Thesis, Université d'Ottawa / University of Ottawa, 2015. http://hdl.handle.net/10393/33160.

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Carbon fibre reinforced composites are known for their high specific strength-to-weight ratio and are of great interest to the aerospace industry. Incorporating these materials into the fuselage, like in Boeing's 787 "Dreamliner", offers considerable weight reduction which increases flying efficiency, and reduces the cost of flying. In flight, aircraft are often subject to lightning strikes which, in the case of composites, can result in localized melting given the high resistive nature of the material. Aerospace carbon fibre composites often incorporate a metallic mesh or foil within the comp

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9

Assaf, Ihab Adeeb. "Shear strengthening of reinforced concrete beams using an external carbon fibre reinforced polymer (CFRP) composite of low elastic modulus." Thesis, University of Salford, 2007. http://usir.salford.ac.uk/26555/.

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Beam-column joints designed seismically are considered impractical due to the congestion of steel stirrups. Currently, CFRP is used for strengthening reinforced concrete structures that have reduced integrity due to corrosion of steel reinforcement or unintentional overloading. The aim of this thesis is to mitigate the congestion of steel stirrups in the beam-column joint regions using an externally bonded CFRP composite and to possibly propose initial 'new build' design rules. Experimental work was conducted on 24 reinforced concrete beams with different percentages of steel shear reinforceme

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10

Eyre, Kyle J. "Moisture absorption and stiffness degradation of carbon fiber reinforced polymer composite specimens exposed to accelerated environmental aging conditions." Laramie, Wyo. : University of Wyoming, 2007. http://proquest.umi.com/pqdweb?did=1313919681&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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11

Bettelli, Mercedes Amelia. "Effect of Induction-Heat Post-Curing on Residual Stresses in Fast-Curing Carbon Fibre Reinforced Composites." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-80527.

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Manufacturing induced shape distortions is a common problem for composite materials. Due to the non-isotropic nature of carbon fibre reinforced polymers (CFRP) unavoidable deformations occur during part production. During fabrication of polymer composites, the material obtains its final shape at elevated temperatures. The curing process involves a transition from the liquid state to the solid, glassy state, allowing bonding between fibres and matrix. As the material cools the mismatch in thermal expansion coefficients and cure shrinkage obtained during the matrix polymerization leads to residu

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12

Olka, Michael. "FLEXURAL MECHANICAL DURABILITY OF CONCRETE BEAMS STRENGTHENED BY EXTERNALLY BONDED CARBON FIBER REINFORCED POLYMER SHEETS." Master's thesis, University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3120.

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About 77,600 bridges throughout the United States in the Federal Highway Association (FHWA) bridge database are listed as structurally deficient. This has created a need to either replace or strengthen bridges quickly and efficiently. Due to high costs for total replacement of deficient bridges, strengthening of existing bridges is a more economical alternative. A technique that has been developing over the past two decades is the strengthening of bridges using carbon fiber reinforced polymer (CFRP) sheets. The CFRP sheets are attached to the bottom of the bridge girders using structural adhes

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13

Tann, David Bohua. "Retrofitting of mechanically degraded concrete structures using fibre reinforced polymer composites." Thesis, University of South Wales, 2001. https://pure.southwales.ac.uk/en/studentthesis/retrofitting-of-mechanically-degraded-concrete-structures-using-fibre-reinforced-polymer-composites(efce1110-34e1-457d-8ec5-3ef5da026018).html.

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This research involves the study of the short term loaded behaviour of mechanically degraded reinforced concrete (RC) flexural elements, which are strengthened with fibre reinforced polymer (FRP) composites. The two main objectives have been: (a) to conduct a series of realistic tests, the results of which would be used to establish the design criteria, and (b) to carry out analytical modelling and hence develop a set of suitable design equations. It is expected that this work will contribute towards the establishment of definitive design guidelines for the strengthening of reinforced concrete

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14

Chan, Kathleen Joyce. "Investigation of Processing Conditions and Viscoelastic Properties on Frictional Sliding Behavior of Unidirectional Carbon Fiber Epoxy Prepreg." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/86444.

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The quality of continuous fiber reinforced polymer matrix composite parts and structures depends strongly on the friction during the composite forming process. The two major types of friction that cause deformations during this process are ply-ply friction and tool-ply friction. One of the challenges in the composite forming process is the occurrence of wrinkling and shape distortion of the fabric caused by the surface differences between the forming tool and surface of the laminate. Frictional measurements of composites can vary widely depending on processing parameters, measurement technique

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15

Nguyen, Thanh Hai. "Contribution à l'étude du comportement thermomécanique à très haute température des matériaux composites pour la réparation et/ou le renforcement des structures de Génie Civil." Thesis, Lyon 1, 2015. http://www.theses.fr/2015LYO10244/document.

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Dans le domaine du renforcement et/ou de la réparation des structures en béton armé par des matériaux composites à l'aide de la méthode du collage extérieur au moyen d'un adhésif époxy, une des préoccupations de la communauté scientifique est l'intégrité structurelle de ce système dans le cas d'incendie dans lequel la haute température est une caractéristique essentielle et peut atteindre jusqu'à 1200°C. Ce travail de recherche est axé sur le comportement thermomécanique à très haute température des matériaux composites [un composite à base de polymère carbone/ époxy (Carbon Fiber Reinforced P

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16

Beguinel, Johanna. "Interfacial adhesion in continuous fiber reinforced thermoplastic composites : from micro-scale to macro-scale." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI051.

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L’intérêt croissant de l’industrie pour les matériaux composites thermoplastiques est motivé par leurs propriétés de thermoformabilité, de recyclabilité ainsi que leurs capacités de cadences de production élevées. Le développement de matériaux pré-imprégnés thermoplastiques, apparus dès les années 1980, s’est imposé comme un moyen efficace de contourner les fortes viscosités des polymères utilisés en réduisant la distance d’écoulement des polymères à l’état « fondu ». Cette étude s’est plus particulièrement intéressée au développement de composites à base de tissus de verre et de carbone pré-i

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17

永正, 邵., and Yongzheng Shao. "Study on the effects of matrix properties on the mechanical properties of carbon fiber reinforced plastic composites." Thesis, https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB12902982/?lang=0, 2015. https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB12902982/?lang=0.

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It was found that a significant improvement of mechanical properties of CFRPs can be achieved by the adjustment of the matrix properties such as toughness and CF/matrix adhesion via the chemical modification, as well as the physical modification by a small amount of cheap and environment-friendly nano fibers. Based on investigation of fracture mechanisms at macro/micro scale, the effects of matrix properties and nano fiber on the mechanical properties of CFRP have been discussed. Subsequently, the relationship has been characterized by a numerical model to show how to modulate the parameters o

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18

Qazi, Samiullah. "Comportement mécanique sous sollicitations alternées de voiles béton armé renforcés par matériaux composites." Phd thesis, INSA de Lyon, 2013. http://tel.archives-ouvertes.fr/tel-00961220.

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Les enquêtes récentes sur les séismes ont fait ressortir l'importance des murs en béton armé en tant que partie intégrante des structures. L'évolution des règlements prend en compte ces considérations, par contre le bâti existant doit subir des renforcements dans l'objectif de leur mise en conformité. Dans cette thèse une étude expérimentale faite sur douze murs (six élancés et six courts) renforcés par un collage externe en composite a été conduite. Les murs ont été conçus en étant sous-renforcés à la flexion et cisaillement. Quatre de ces six échantillons ont été renforcés par des bandes de

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19

Breña, Sergio F. "Strengthening reinforced concrete bridges using carbon fiber reinforced polymer composites /." Full text (PDF) from UMI/Dissertation Abstracts International, 2000. http://wwwlib.umi.com/cr/utexas/fullcit?p3004223.

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20

Jain, Rahul. "Carbon nanotube reinforced polyacrylonitrile and poly(etherketone) fibers." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/28257.

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Thesis (M. S.)--Polymer, Textile and Fiber Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: Kumar, Satish; Committee Member: Bucknall, David; Committee Member: Griffin, Anselm; Committee Member: Shofner, Meisha; Committee Member: Yushin, Gleb

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21

Pillain, Baptiste. "Définition des indicateurs clés de performance et évaluation multicritère de filières durables de recyclage des polymères renforcés de fibres de carbone issus de l’industrie aéronautique." Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0630/document.

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La consommation globale de plastique renforcé de fibres de carbone (PRFC) est en constante augmentation, ce qui induit la nécessité de créer un secteur de recyclage capable de traiter l’ensemble des fibres de carbone actuellement consommées et qui représente la quantité de déchets à traiter en devenir. Cette thèse porte sur le développement et l'application d’une méthodologie d’évaluation multicritère du développement durable pour la création d’une filière de recyclage des plastiques renforcés de fibres de carbone (PRFC) issus du secteur aéronautique, mais aussi des autres secteurs consommateu

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22

Diao, Hele. "Carbon fibre reinforced polymer composites with enhanced ductility." Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/44273.

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Carbon fibre reinforced polymers (CFRPs) have high strength and stiffness, low density, long fatigue life in the fibre direction and good corrosion resistance. Nowadays, CFRPs are been used in aeronautics, wind turbine blades, sports goods and civil industry. However, one fundamental limitation of CFRPs is their brittleness (low ductility): CFRPs fail catastrophically at a relatively low strain (1.5% to 1.8%) under the tension with little warning or residual load-carrying capacity. To overcome this weakness, there is considerable interest to enhance the ductility of CFRPs exhibiting increased

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23

Sellitti, Claudio. "Surface characterization of carbon fibers and interfacial phenomena in carbon reinforced composites." Case Western Reserve University School of Graduate Studies / OhioLINK, 1990. http://rave.ohiolink.edu/etdc/view?acc_num=case1054570728.

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24

Garekani, Amir Hossein Afrasiabi. "Numerical modeling of orthogonal cutting of carbon fibre reinforced polymer composites." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/58401.

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The focus of this study is on the orthogonal cutting of fibre reinforced composites. A thorough review of the literature is presented in both experimental and numerical work that has thus far been conducted. It is found that in orthogonal cutting of composites, cutting forces, chip formation mechanism and the extent of damage below the cutting plane are highly dependent on the fibre orientation. With fibre orientation increasing from 0° to 90°, cutting forces tend to increase and chips become more dust-like. Two modeling approaches are most commonly adopted for the prediction of force and chi

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25

Scudder, Lawrence Philip. "Characteristics and testing of carbon fibre reinforced polymer composites using laser generated ultrasound." Thesis, University of Warwick, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283488.

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26

Todt, Andreas. "Beitrag zur Entwicklung neuartiger hybrider Werkstoffverbunde auf Polymer/Keramik-Basis." Doctoral thesis, Universitätsbibliothek Chemnitz, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-228698.

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Kohlenstofffaserverstärkter Kohlenstoff weist ausgezeichnete thermische, mechanische und chemische Eigenschaften auf. Aufgrund seiner Faserarchitektur und Porosität zeigt dieser eine mit metallischen und polymeren Werkstoffen vergleichbar hohe Schadenstoleranz. Die Herstellung komplexer Leichtbaustrukturen aus C/C-Verbunden ist jedoch zeit- und kostenintensiv. Ein neuer Ansatz stellt die Integration geometrisch simpler C/C-Verbunde in komplexe, problemlos zu realisierende polymere Strukturen dar. Ein derartiges Werkstoffkonzept vereint die Vorteile seiner Komponenten in einem ganzheitlichen We

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27

Lee, Tuan Kuan 1976. "Shear strength of reinforced concrete T-beams strengthened using carbon fibre reinforced polymer (CFRP) laminates." Monash University, Dept. of Civil Engineering, 2003. http://arrow.monash.edu.au/hdl/1959.1/6647.

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28

Bin, Ahmad Sobri Sharizal. "Mechanical and laser drilling of thick carbon fibre reinforced polymer composites (CFRP)." Thesis, University of Manchester, 2018. https://www.research.manchester.ac.uk/portal/en/theses/mechanical-and-laser-drilling-of-thick-carbon-fibre-reinforced-polymer-composites-cfrp(e5c5182e-a8b2-49c9-bceb-bd7ba9342eb1).html.

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Carbon fibre reinforced polymer, or CFRP composite materials, play an increasingly important role in modern manufacturing. They are widely used in aerospace, and their use is currently spreading to other industries where high strength-to-weight ratios are required. However, machining of composites is still a challenging task and often hampered by poor quality. Despite the extensive research that was conducted on the machining of composite materials over the last few years, mechanical drilling still suffers from delamination, fibre pull-out and poor surface finish, whereas laser cutting produce

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29

Raud, Christophe. "Fissuration des composites carbone à matrice thermostable en traction isotherme et cyclage thermique." Cachan, Ecole normale supérieure, 1993. http://www.theses.fr/1993DENS0013.

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Ce travail vise a mieux comprendre les phénomènes qui régissent la microfissuration des stratifies carbone/matrice organique thermostable. Deux matériaux représentatifs des classes de température 200-250c (t800/5250 et t800/pmr-15), élaborés suivant plusieurs conditions de moulage, ont été étudiés. Il s'agit de déterminer l'influence des paramètres de fabrication sur la sensibilité a la microfissuration d'un drapage modelé 0#2,90#2#s dans des conditions de chargement quasi-statiques (traction uniaxiale) ou en sollicitation thermique alternée : en isotherme, des essais en traction statique inte

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30

Curnick, Paul. "An investigation on the machining of multidirectional glass and carbon fibre reinforced polymer composites." Thesis, University of Wales Trinity Saint David, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.683075.

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31

Shalaby, Ashraf Mounir Mahmoud. "Development of a new spun concrete pole reinforced with carbon fiber reinforced polymer bars." Birmingham, Ala. : University of Alabama at Birmingham, 2007. https://www.mhsl.uab.edu/dt/2009r/shalaby.pdf.

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Thesis (Ph. D.)--University of Alabama at Birmingham, 2007.<br>Title from PDF title page (viewed Feb. 5, 2010). Additional advisors: Ashraf Al Hamdan, Wilbur A. Hitchcock, Jason T. Kirby, Talat Salama. Includes bibliographical references (p. 148-153).

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Prickett, Andrew C. "Intralaminar cracking of fibre reinforced composites : a fracture mechanics and ToF-SIMS study." Thesis, University of Surrey, 2001. http://epubs.surrey.ac.uk/798035/.

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Green, Keith Jamahl. "Multiscale fiber reinforced composites using a carbon nanofiber/epoxy nanophased matrix processing, properties, and thermochemical behavior /." Birmingham, Ala. : University of Alabama at Birmingham, 2007. https://www.mhsl.uab.edu/dt/2007m/green.pdf.

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Bolimowski, Patryk Adam. "Microcapsule-based self-healing in carbon fibre reinforced polymer composites : towards design and application." Thesis, University of Bristol, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.705473.

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35

Yari, Boroujeni Ayoub. "Fatigue, Fracture and Impact of Hybrid Carbon Fiber Reinforced Polymer Composites." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/84223.

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The excellent in-plane strength and stiffness to-weight ratios, as well as the ease of manufacturing have made the carbon fiber reinforced polymer composites (CFRPs) suitable structural materials for variety of applications such as aerospace, automotive, civil, sporting goods, etc. Despite the outstanding performance of the CFRPs along their fibers direction (on-axis), they lack sufficient strength and performance in the out-of-plane and off-axis directions. Various chemical and mechanical methods were reported to enhance the CFRPs' out-of-plane performance. However, there are two major drawba

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Kolachina, Akhil. "Analysis of the Behaviour of CFRP Specimens Under BVID Conditions." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.

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Composites are the most widely used materials in the aero industry. Among the composite materials CFRP (Carbo Fiber Reinforced Polymer) usage is observed in a large percentage in comparison with other materials due to its strength, stiffness, weight ratios, etc., advantage. With the growth in usage of CFRP the complexity in assessing the fracture behaviour in the composite laminates also increased. So, it is important to study its properties under different conditions. In this study, we analyse the residual mechanical strength of composite material under hygroscopic aging, carbon/epoxy prone

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Alisawi, Mazin Yaseen. "Effect of indenter size on damage of carbon fibre-reinforced polymer composites under impact loads." Thesis, University of Leicester, 2017. http://hdl.handle.net/2381/40675.

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The applications of composite materials have been increasing significantly in recent decades. The major effect limiting the use composite materials is the lack of understanding of their response and their structural integrity under dynamic loads. Delamination under dynamic load is particularly recognised as the most critical damage process in laminated composites. The objective of this thesis is to experimentally and numerically investigate the fundamental phenomena associated with delamination. This is important develop a further knowledge of the response and damage mechanisms of composite ma

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Hart, Robert James. "Electrical resistance based damage modeling of multifunctional carbon fiber reinforced polymer matrix composites." Diss., University of Iowa, 2017. https://ir.uiowa.edu/etd/5493.

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In the current thesis, the 4-probe electrical resistance of carbon fiber-reinforced polymer (CFRP) composites is utilized as a metric for sensing low-velocity impact damage. A robust method has been developed for recovering the directionally dependent electrical resistivities using an experimental line-type 4-probe resistance method. Next, the concept of effective conducting thickness was uniquely applied in the development of a brand new point-type 4-probe method for applications with electrically anisotropic materials. An extensive experimental study was completed to characterize the 4-probe

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SILVA, NELSON M. da. "Obtencao e comportamento mecanodinamico de compositos com matriz polimerica reforcada com fibras de carbono." reponame:Repositório Institucional do IPEN, 2001. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10888.

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Made available in DSpace on 2014-10-09T12:45:09Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T13:59:31Z (GMT). No. of bitstreams: 1 07017.pdf: 4719502 bytes, checksum: 28a724854a3b5a54707b7678f9280cb2 (MD5)<br>Dissertacao (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP

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Angelidis, Nikolaos. "Damage sensing in CFRP composites using electrical potential techniques." Thesis, Cranfield University, 2004. http://dspace.lib.cranfield.ac.uk/handle/1826/127.

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This Thesis investigates the damage sensing capabilities of the electrical potential measurement technique in carbon fibre reinforced polymer composites. Impact damage was introduced in multidirectional laminates and its effect on potential distribution studied. It was found that delaminations and fibre breakages within the laminate can be detected and located by measuring potential changes on the external composite surface. The extent and size of potential changes were significantly affected by the position of the current electrodes in relation to the potential measurement probes. A numerical

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Herrington, Kevin D. "Factors Affecting Fiber Orientation and Properties in Semi-Flexible Fiber Composites Including the Addition of Carbon Nanotubes." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/56655.

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Within this research, factors affecting the orientation of injection molded long fiber composites in an end-gated plaque were investigated. Matrix viscosity was found to have a small effect on fiber orientation. The impact matrix viscosity had on orientation was dependent on fiber loading. At lower fiber loadings, the higher viscosity material had a more asymmetric orientation profile throughout the samples and less of a shell-core-shell orientation. At higher fiber loadings, there were few differences in orientation due to matrix viscosity. Fiber concentration was found to have a larger influ

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Abdi, Yussuf Yusuf, and Ibrahim Zand Jalal. "FRP:s användning inom brokonstruktioner." Thesis, KTH, Byggteknik och design, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-259362.

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I dagsläget är de flesta broar i Sverige tillverkade med betong eller stål. Dessa broar är många gånger förknippade med stora kostnader som ofta beror på underhåll och reparation. FRP, som står för Fiber Reinforced Polymer, är ett relativt nytt material i bärande stommar men är ett väl etablerat material i förstärkningssammanhang. I Europa och i synnerhet Nederländerna finns det flertal broar byggda i FRP. Men på grund av brist på normer och regelverk att luta sig emot sker det sällan någon form av brokonstruktion med FRP i Sverige. Detta examensarbete syftar till att undersöka befintliga norm

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LOPES, MARCELA TORNO DE AZEREDO. "STRUCTURAL RELIABILITY ANALYSIS APPLICATION TO THE DESIGN OF CARBON FIBRES REINFORCED POLYMER SHEAR STRENGTHENING OF REINFORCED CONCRETE BEAMS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2007. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=10981@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>A análise de confiabilidade aplicada ao projeto de estruturas é uma ferramenta que permite avaliar a probabilidade de falha da estrutura para um certo modo de comportamento e a sensibilidade deste projeto em relação às variáveis consideradas. Neste trabalho a análise de confiabilidade é aplicada ao projeto de reforço à força cortante com compósitos de fibras de carbono de vigas em concreto armado. Inicialmente, modelos e prescrições normativas para verificar a capacidade resistente do reforço à força cortante são implement

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Kaiser, Richard Lawrence. "Analysis and Connection of Lightweight CFRP Sandwich Panels for Use as Floor Diaphragms in Structural Steel Buildings." Diss., The University of Arizona, 2014. http://hdl.handle.net/10150/321006.

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A lightweight carbon fiber reinforced polymer (CFRP) sandwich panel has been developed for floor use in commercial office building construction. CFRP laminate skins were combined with low-density rigid polyurethane foam to create a composite sandwich panel suitable for floor use. The CFRP sandwich panel was optimized to withstand code prescribed office-building live loads using a 3D finite element computer program called SolidWorks. The thickness of the polyurethane foam was optimized to meet both strength and serviceability requirements for gravity loading. Deflection ultimately was the contr

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VERDEAU, TRUFFIER CAROLINE. "Influence des conditions d'elaboration sur la zone interfaciale de materiaux composites hautes performances a matrice thermoplastique." Paris, ENMP, 1988. http://www.theses.fr/1988ENMP0117.

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Microstructure et proprietesmecaniques de composites unidirectionnelles polyetherethercetone/ fibres carbone, sulfure de polyphenylene/fibres de carbone et polyetherimide/fibre de carbone. Influence de temps rapide, refroidissement lent etc. Essais mecaniques. Cohesion interne. Mise en evidence d'une phase "transcristalline". Modelisation du comportement viscolastique

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Elrikh, Axelle. "Revêtement anti-usure déposé par projection plasma sur matériaux composites fibres de carbones/matrice époxy pour applications aéronautiques." Thesis, Limoges, 2016. http://www.theses.fr/2016LIMO0131/document.

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Les matériaux composites à matrice polymères renforcés aux fibres de carbone (PRFC) sont de plus en plus utilisés dans les avions, en raison de leur faible densité et de leurs propriétés mécaniques comparables aux alliages généralement utilisés. Ils sont cependant sensibles aux impacts répétés des particules solides et liquides intervenant au cours du cycle de vol d’un avion, et nécessitent d’être protégés. Cette thèse est inscrite dans ce contexte de protection des PRFC, plus particulièrement ceux à matrice époxy, par le biais de dépôts anti-usure réalisés par projection plasma sous air. De t

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Soroudi, Azadeh. "Melt Spun Electro-Conductive Polymer Composite Fibers." Doctoral thesis, Högskolan i Borås, Institutionen Ingenjörshögskolan, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-3590.

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One interesting approach is the development of conductive polymer composite fibers for innovative textile applications such as in sensors, actuators and electrostatic discharge. In this study, conductive polymer composite fibers were prepared using several different blends containing conductive components: a conjugated polymer (polyaniline-complex) and/or carbon nanotubes. Different factors such as processing parameters, the morphology of the initial blends and the final fibers, fiber draw ratio and material selection were studied separately to characterize their effects on the fiber propertie

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Cococcetta, Nicholas Michael. "Investigating Surface Finish, Burr Formation and Tool Wear During Sustainable Machining of 3D Printed Carbon Fiber Reinforced Polymer (CFRP) Composites." Miami University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=miami1586533608277002.

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Guetta, Brigitte. "Vieillissement hygrothermique de composites a matrice psp : etude cinetique, mecanique et spectroscopique." Paris, ENMP, 1987. http://www.theses.fr/1987ENMP0057.

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Kadam, Ruthvik Dinesh. "Design and Additive Manufacturing of Carbon-Fiber Reinforced Polymer Microlattice with High Stiffness and High Damping." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/103009.

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Carbon fiber reinforced polymer (CFRP) composites are known for their high stiffness-to-weight and high strength-to-weight ratios and hence are of great interest in several engineering fields such as aerospace, automotive and defense. However, despite their light weight, high stiffness and high strength, their application in these fields is limited due to their poor energy dissipation and vibration damping capabilities. This thesis presents a two-phase microlattice design to overcome this problem. To realize this design, a novel tape casting integrated multi-material stereolithography system i

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