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Dissertations / Theses on the topic 'Fibre-reinforced composite materials'

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Published: 4 June 2021
Last updated: 11 March 2023

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1

Vaziri, Reza. "On constitutive modelling of fibre-reinforced composite materials." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/29311.

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A relatively simple but comprehensive constitutive model is presented herein for predicting the nonlinear behaviour of laminated composite structures comprising layers of unidirectional and/or bidirectional (e.g. woven) fibre-reinforced materials (FRMs). The FRM layer is treated as an orthotropic but homogeneous continuum undergoing isothermal infinitesimal deformation. The proposed constitutive model for single layers of FRM is built within the framework of rate-independent theory of orthotropic elastoplasticity. The constitutive equations so developed, are then superimposed using the classi
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2

Beckermann, Gareth. "Performance of Hemp-Fibre Reinforced Polypropylene Composite Materials." The University of Waikato, 2007. http://hdl.handle.net/10289/2543.

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Increasing worldwide environmental awareness is encouraging scientific research into the development of cheaper, more environmentally friendly and more sustainable construction and packaging materials. Natural fibre reinforced thermoplastic composites are strong, stiff, lightweight and recyclable, and have the potential to meet this need. Industrial hemp fibre is amongst the strongest of the natural fibres available, and possesses a similar specific stiffness to E-glass, but with additional benefits such as low cost and low production energy requirements. The favourable mechanical properties
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3

Buck, Lyndon. "Furniture design with composite materials." Thesis, Bucks New University, 1997. http://bucks.collections.crest.ac.uk/9977/.

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This thesis examined the feasibility of fibre composite reinforcement in the furniture industry. The development of post war furniture design was reviewed, with particular emphasis on the main design movements and the use of new materials and technologies. The use of fibre composite materials in contemporary furniture was discussed in terms of technical development, environmental effects and psychological acceptance. Fibre reinforcements and adhesives were compared, as were fabrication techniques applicable to the existing British furniture industry. Particular emphasis has been placed on the
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4

ROSSI, JESUALDO L. "The Fatigue damage in a fibre reinforced alloy." reponame:Repositório Institucional do IPEN, 1991. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10280.

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Made available in DSpace on 2014-10-09T12:36:50Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T13:55:59Z (GMT). No. of bitstreams: 1 04367.pdf: 13092427 bytes, checksum: 83b3ae20c1812b73fa90ae0e064d0c8b (MD5)<br>Thesis (Doctorate)<br>IPEN/T<br>University of Manchester, England
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5

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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6

Barris, Peña Cristina. "Serviceability behaviour of fibre reinforced polymer reinforced concrete beams." Doctoral thesis, Universitat de Girona, 2011. http://hdl.handle.net/10803/7772.

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El uso de materiales compuestos de matriz polimérica (FRP) emerge como alternativa al hormigón convencionalmente armado con acero debido a la mayor resistencia a la corrosión de dichos materiales. El presente estudio investiga el comportamiento en servicio de vigas de hormigón armadas con barras de FRP mediante un análisis teórico y experimental. Se presentan los resultados experimentales de veintiséis vigas de hormigón armadas con barras de material compuesto de fibra de vidrio (GFRP) y una armada con acero, todas ellas ensayadas a flexión de cuatro puntos. Los resultados experimentales son a
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7

Matemilola, Saka Adelola. "Impact damage to composite materials." Thesis, University of Cambridge, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319939.

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8

Carruthers, Joseph John. "Some aspects of the energy absorption of composite materials." Thesis, University of Sheffield, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267188.

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9

Gascons, i. Tarrés Marc. "Assessment of virtual design and manufacturing techniques for fibre reinforced composite materials." Doctoral thesis, Universitat de Girona, 2011. http://hdl.handle.net/10803/52864.

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Virtual tools are commonly used nowadays to optimize product design and manufacturing process of fibre reinforced composite materials. The present work focuses on two areas of interest to forecast the part performance and the production process particularities. The first part proposes a multi-physical optimization tool to support the concept stage of a composite part. The strategy is based on the strategic handling of information and, through a single control parameter, is able to evaluate the effects of design variations throughout all these steps in parallel. The second part targets the resi
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10

Sahin, Yusuf. "The mechanical and wear behaviour of B(SiC) fibre-reinforced composite materials." Thesis, Aston University, 1994. http://publications.aston.ac.uk/15382/.

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The mechanical properties and wear behaviour of B(SiC) fibre-reinforced metal matrix composites (MMCs) and aluminium alloy (2014) produced by metal infiltration technique were determined. Tensile tests were peliormed at different conditions on both the alloy matrix and its composite, and the tensile fracture surfaces were also examined by Scanning Electron Microscopy (SEM). Dry wear of the composite materials sliding on hardened steel was studied using a pin-on-disc type machine. The effect of fibre orientation on wear rate was studied to provide wear resistance engineering data on the MMCs. T
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11

Tavallaee, Mahmood. "Bi-directional strengthening of two-way spanning reinforced concrete slabs using fibre reinforced polymer composite materials." Thesis, Kingston University, 2016. http://eprints.kingston.ac.uk/37317/.

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The use of fibre reinforced polymer (FRP) systems as externally bonded reinforcement has become very popular for the repair and strengthening of reinforced concrete (RC) structures. It is an alternative to the traditional techniques, due to well-known advantages of FRP composites such as high strength- and stiffness-to-weight ratios, corrosion resistance and ease of transportation and installation. In this thesis, experimental and numerical investigations were conducted on estimating the behaviour of two-way spanning reinforced concrete slabs strengthened using FRP composite material. The expe
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12

Sudarisman. "Flexural behaviour of hybrid fibre-reinforced polymer (FRP) matrix composites." Thesis, Curtin University, 2009. http://hdl.handle.net/20.500.11937/2110.

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The flexural behaviour of three different hybrid fibre-reinforced polymer (FRP) matrix composites, i.e. S2-glass/E-glass/epoxy, TR50S carbon/IM7 carbon/epoxy, and E-glass/TR50S carbon/epoxy hybrid FRP composites, has been investigated. The main objectives of this study were to: (i) improve the flexural properties of the parent composite materials, i.e. E-glass/epoxy and TR50S carbon fibre/epoxy composites, through substitution of stronger fibres, i.e. S2-glass and IM7 carbon fibres, for the fibres of the parent composite materials, and (ii) determine the optimum stacking configurations that pr
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13

Zhang, Mei. "The effects of contamination on the mechanical properties of carbon fibre reinforced epoxy composite materials." Thesis, University of Portsmouth, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299084.

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14

Trias, Mansilla Daniel. "Analysis and Simulation of Transverse Random Fracture of Long Fibre Reinforced Composites." Doctoral thesis, Universitat de Girona, 2005. http://hdl.handle.net/10803/7762.

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La present tesi proposa una metodología per a la simulació probabilística de la fallada de la matriu en materials compòsits reforçats amb fibres de carboni, basant-se en l'anàlisi de la distribució aleatòria de les fibres. En els primers capítols es revisa l'estat de l'art sobre modelització matemàtica de materials aleatoris, càlcul de propietats efectives i criteris de fallada transversal en materials compòsits.<br/>El primer pas en la metodologia proposada és la definició de la determinació del tamany mínim d'un Element de Volum Representatiu Estadístic (SRVE) . Aquesta determinació es du a
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15

Van, der Westhuizen Artho Otto. "Impact response of a continuous fibre reinforced thermoplastic from a soft bodied projectile." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/80095.

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Thesis (MScEng)--Stellenbosch University, 2013.<br>AFRIKAANSE OPSOMMING: Saamgestelde materiale het baie gewilde materiale in die lugvaart- en motor industrië geword as gevolg van die gewigsbesparende voordele wat dit inhou. Kostes en ander verwerkingsprobleme het tradisioneel die wydverspreide gebruik van spesifiek termoplasties-versterkte vesels in hierdie areas verhinder. Baie van die vervaardigingsprobleme (spesifiek lang siklusse) is aangespreek met die aanvang van termoplastiese matriks materiaal soos Polyphenolien Sulfied (PPS). Hierdie materiaal voldoen ook aan die lugvaart-indus
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16

Berger, Andre. "Numerical modelling of composite materials based on a combined manufacturing-crash simulation." Thesis, Queen Mary, University of London, 2014. http://qmro.qmul.ac.uk/xmlui/handle/123456789/8925.

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Fibre reinforced plastics are widely used for energy dissipating parts. Due to their superior strength to density ratio they provide a high performance and are ideal for lightweight design for crashworthiness. For this, it is essential that the mechanical behaviour of fibre reinforced composites can be predicted correctly by simulation. However, due to the complex inner structure, this is still a challenging task, in particular in case of highly nonlinear crash loading. In this work, a new purely virtual method is developed, which derives the complex fibre structure of a filament wound tube by
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17

Abessalam, Qutaiba. "Investigation into the modes of damage and failure in natural fibre reinforced epoxy composite materials." Thesis, University of East London, 2011. http://roar.uel.ac.uk/2632/.

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The aim of the research is to develop new high performance composite materials that would potentially compete with existing man made materials and to investigate the physical, mechanical and thermal properties of crushed (powdered) olive stones (pits) reinforced epoxy composites. This research focuses on development of a new range of sustainable reinforced polymer composite materials using powdered olive pits as a novel filler material to be used with synthetic resins. A full review has been made of the previous work on different types of natural fibres and fillers used as reinforcement for sy
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18

Vasiukov, Dmytro. "Damage modeling of fibre reinforced polymer composite materials under cyclic loadings by a simplified approach." Thesis, Lille 1, 2013. http://www.theses.fr/2013LIL10043.

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Ce travail de thèse présente le développement de modèles numériques pour la modélisation de l’endommagement des matériaux composites à fibres continues et matrice polymère. L’objectif est de fournir des outils numériques efficaces pour prédire l’endommagement sous chargement monotone et cyclique. Deux modèles ont été développés, un basé sur une approche multi-échelle d’homogénéisation et l’autre défini dans le cadre de la mécanique de l’endommagement. Ce dernier est utilisé dans une nouvelle approche pour prédire la durée de vie des matériaux composites. La première approche est une méthode mu
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19

Machado, Carla Maria Moreira. "Empirical models for quantification of machining damage in composite materials." Doctoral thesis, Faculdade de Ciências e Tecnologia, 2012. http://hdl.handle.net/10362/9058.

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Dissertação para obtenção do Grau de Doutor em Engenharia Mecânica<br>The tremendous growth which occurs at a global level of demand and use of composite materials brings with the need to develop new manufacturing tools and methodologies. One of the major uses of such materials, in particular plastics reinforced with carbon fibres, is their application in structural components for the aircraft industry with low weight and high stiffness. These components are produced in near-final form but the so-called secondary processes such as machining are often unavoidable. In this type of industry, dri
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20

Dandy, Luke. "Supercritical fluids and their application to the recycling of high-performance carbon fibre reinforced composite materials." Thesis, University of Birmingham, 2015. http://etheses.bham.ac.uk//id/eprint/5896/.

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The decomposition of high-performance thermoplastic and thermoset polymers is carried out by using supercritical fluids, in conjunction with a caesium carbonate catalyst (Cs\(_2\)C0\(_3\)). Polyetheretherketone (PEEK) and its carbon fibre filled composite are used as the high-performance thermoplastic, owing to its strong chemical resistance and excellent thermal and chemical stability. 2,2-Bis[4-(glycidyloxy)phenyl]propane (BADGE) is cross-linked with 4,4' –diaminodiphenyl sulfone (DDS) to produce a high-performance thermoset resin used to investigate the decomposition of the polymer matrices
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21

Louwsma, Jeroen. "Synthesis and investigation of oligomers based on phenylalanine as interfacial agents in fibre-reinforced thermoplastic composite materials." Thesis, Strasbourg, 2018. http://www.theses.fr/2018STRAF047.

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Le développement d’agents interfaciaux pour des matériaux composites renforcés de fibres est nécessaire afin d’obtenir des matériaux performants notamment pour l’industrie automobile. Le projet se concentre sur la synthèse d’oligomères à séquences contrôlées préparés par synthèse en phase solide par réaction d’amidification et de cycloaddition assistée par le cuivre entre un azoture et un alcyne pour introduire précisément des unités de phénylalanine et des groupes aliphatiques. Ces oligomères ont été testés comme agents interfaciaux pour des matériaux composites à base de polypropylène renfor
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22

Peng, Joe Zhou. "Modelling of the cellulose and cement mineral bond and the mechanism of aluminous compounds in retarding cement carbonation." Thesis, View thesis, 2001. http://handle.uws.edu.au:8081/1959.7/26659.

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Analysis of calcium and oxygen atom arrays of known cement minerals and the structures of cellulose polymorphs were performed to see if it was possible to arrange a cellulose fibre on a cement mineral face such that the fibre is bonded by a repeating array of hydrogen or hydroxide coordination bonds for the full length of the attachment. Of the sixteen important cement minerals modelled, xonotlite, foshagite, tricalcium aluminate hydrate, chondronite and rosenhahnite could form such bonds to modified cellulose fibre. However, this was not the case for other cement minerals, especially tobermor
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23

Zhang, Zhong Yi. "Visualisation and quantification of the defects in glass-fibre reinforced polymer composite materials using electronic speckle pattern interferometry." Thesis, Loughborough University, 1999. https://dspace.lboro.ac.uk/2134/22078.

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Non-destructive testing (NDT) of glass-fibre reinforced polyester (GRP) composite materials has been becoming increasingly important due to their wide applications in engineering components and structures. Electronic Speckle Pattern Interferometry (ESPI) has promising potential in this context because it is a non-contact, whole-field and real-time measurement system. This potential has never been fully exploited and there is only limited knowledge and understanding available in this area. This reality constrains the wide popularity and acceptance of ESPI as a novel NDT technique. Therefore it
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24

Peng, Joe Zhou. "Modelling of the cellulose and cement mineral bond and the mechanism of aluminous compounds in retarding cement carbonation /." View thesis, 2001. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030714.164824/index.html.

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25

Alamri, Hatem Rashed. "Microstructural design and properties of high performance recycled cellulose fibre reinforced polymer eco-nanocomposites." Thesis, Curtin University, 2012. http://hdl.handle.net/20.500.11937/765.

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In recent years, cellulose fibre-reinforced polymer composites have been gaining a great attention in several engineering applications due to their desirable properties, which include low density, low cost, renewability and recyclability as well as good mechanical properties. Moreover, cellulose fibres are environmentally friendly, non-toxic and renewable materials. Therefore, manufacturing industries especially packaging, building construction, automotive and furniture have been encouraged to use cellulose fibres in their applications instead of the more expansive and non-renewable synthetic
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26

Miàs, Oller Cristina. "Analysis of time-dependent flexural behaviour of concrete members reinforced with fibre reinforced polymer bar." Doctoral thesis, Universitat de Girona, 2012. http://hdl.handle.net/10803/96914.

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In this work, long-term behaviour of FRP RC beams has been investigated both analytically and experimentally to further extend the knowledge in this particular research domain. In this respect, a new methodology to determine the long-term deflections due to creep and shrinkage is presented. Based on multiplicative coefficients, the methodology is straightforward and simple, and therefore suitable to be used in design. In addition, an experimental campaign on two series of GFRP RC beams subject to long-term loading has been performed. Different reinforcement ratios, concrete strengths and sust
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27

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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28

Guerrero, Garcia José Manuel. "Micromechanical modelling of hybrid unidirectional composite materials under fibre tensile loading." Doctoral thesis, Universitat de Girona, 2020. http://hdl.handle.net/10803/669043.

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In this thesis, a micromechanical model for predicting the tensile failure process in hybrid and non-hybrid unidirectional composite materials under fibre tensile loading is developed. Derived from this, the influence that different parameters have on the failure development in hybrid composites is investigated. The results prove that the model captures qualitatively well the failure development of composite materials. Moreover, adding matrix yielding and dynamic effects into the model allows to improve the modelling predictions compared with experimental results. It is also proved that the si
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Juan, Muñoz Jaime. "Development of the in situ forming of a liquid infused preform (ISFLIP) process : a new manufacturing technique for high performance fibre reinforced polymer (FRP) components." Doctoral thesis, Universitat Politècnica de Catalunya, 2017. http://hdl.handle.net/10803/457775.

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A problem is not a problem anymore if no solution exists; therefore, in the present dissertation, a novel manufacturing technique, the In Situ Forming of a Liquid Infused Preform (ISFLIP), is proposed as a solution to some typical problems that manufacturing of Fibre Reinforced Polymer (FRP) parts through Vacuum Infusion (VI) involves, such as not taking advantage of the full potential of FRPs, long processing times and lack of reproducibility. ISFLIP is a hybrid process between VI and diaphragm forming in which a flat preform of a stack of reinforcement fabrics is firstly impregnated with a
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LO, CASCIO Marco. "Virtual Element based formulations for computational materials micro-mechanics and homogenization." Doctoral thesis, Università degli Studi di Palermo, 2021. http://hdl.handle.net/10447/515115.

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In this thesis, a computational framework for microstructural modelling of transverse behaviour of heterogeneous materials is presented. The context of this research is part of the broad and active field of Computational Micromechanics, which has emerged as an effective tool both to understand the influence of complex microstructure on the macro-mechanical response of engineering materials and to tailor-design innovative materials for specific applications through a proper modification of their microstructure. While the classical continuum approximation does not account for microstructural
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31

Hull, Brian David. "Mathematical theory of flow processes of fibre-reinforced materials." Thesis, University of Nottingham, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335766.

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32

Ren, Guogang. "Fibre reinforced ceramic moulding composites manufacture and characterisation." Thesis, Queen Mary, University of London, 1999. http://qmro.qmul.ac.uk/xmlui/handle/123456789/1710.

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Ceramic materials have considerable attraction for use in applications where the service temperatures are high and where fire performance and non-combustibility are important. Unfortunately most monolithic ceramic materials are extremely brittle which limits their use for structural applications. The development of fibre and particulate reinforced ceramic composites provides a route to achieving increased toughness in the materials, although this is often at the expense of ultimate strengths and/or the process-ability of the materials. Many reinforcing fibres used with ceramics are inherently
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33

Inghels, Eric. "Comportement mecanique de composites a fibres et matrices ceramiques : definition d'une methode d'analyse dans le cas de deux composites tisses a matrice de carbure de silicium." Paris, ENMP, 1987. http://www.theses.fr/1987ENMP0036.

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Dans le cas de composites ceramiques a fibres continues, l'existence de plusieurs mecanismes de degradation peut rendre le comportement non-lineaire, la caracterisation necessitant alors une approche specifique a chaque type de materiau. On developpe une telle approche dans le cas de deux composites tisses c/sic et sic/sic. On realise et on interprete des essais mecaniques a partir d'eprouvettes de traction, de flexion et d'eprouvettes entaillees. On propose une approche theorique du comportement mecanique pour illustrer les resultats experimentaux
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Patel, Harish. "Hemp fibre reinforced sheet moulding compounds." Thesis, Queen Mary, University of London, 2012. http://qmro.qmul.ac.uk/xmlui/handle/123456789/8783.

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Glass fibres are by far the most extensively used fibre reinforcement in thermosetting composites because of their excellent cost-performance ratio. However, glass fibres have some disadvantages such as non- renewability and problems with ultimate disposal at the end of a materials lifetime since they cannot be completely thermally incinerated. The possibility of replacing E-glass fibres with hemp fibres as reinforcement in sheet moulding compounds (SMC) is examined in this thesis. The composites are manufactured with existing SMC processing techniques and similar resin formulation as used in
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35

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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Huang, Da. "Structural behaviour of two-way fibre reinforced composite slabs." University of Southern Queensland, Faculty of Engineering and Surveying, 2004. http://eprints.usq.edu.au/archive/00001450/.

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Innovative new flooring systems utilising lightweight fibre reinforced polymer composite materials may have the significant potential to offer both economic and performance benefits for infrastructure asset owners compared to conventional concrete and steel systems. Over recent years, a range of prototype floor systems using fibre reinforced polymer composites have been developed by researchers at the University of Southern Queensland. However before such structural systems can be widely adopted by industries, fundamental understanding of their behaviour must be improved. Such work will allow
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Francescato, Pascal. "Prévision du comportement plastique des matériaux hétérogènes à constituants métalliques : application aux composites à matrice métallique à fibres continues et aux plaques perforées." Université Joseph Fourier (Grenoble), 1994. http://www.theses.fr/1994GRE10110.

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Ce travail de these porte sur la mise en uvre numerique de la methode d'homogeneisation periodique en calcul a la rupture ou analyse limite et son application a la prevision des proprietes de resistance macroscopiques de materiaux composites a fibres longues ou de plaques metalliques perforees. La methode numerique adoptee consiste a ramener la mise en uvre des approches statique par l'interieur et cinematique par l'exterieur a la resolution d'un probleme d'optimisation lineaire pose sur le volume elementaire representatif (v. E. R. ). Les programmes numeriques font appel a une utilisation ori
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Tiar, Mohamed Amine. "Éléments finis spéciaux pour l’analyse linéaire et non-linéaire géométrique des structures composites à renforts fibreux." Thesis, Compiègne, 2017. http://www.theses.fr/2017COMP2345/document.

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La modélisation numérique des structures composites à renfort fibreux de géométrie complexe constitue un axe de recherche majeur afin de prédire correctement leur comportement mécanique. Dans ce contexte, l’étude menée dans ce travail de thèse porte sur le développement de nouveaux éléments finis basés sur une approche numérique multi-échelle, appelée Approche de la Fibre Projetée (AFP). Cette approche a l’avantage de tenir compte de la présence des fibres au sein d’un espace matrice sans les discrétiser, ce qui limite considérablement la taille du système à résoudre. Pour analyser le comporte
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Lameiras, Rodrigo de Melo. "Contribuição ao estudo das propriedades dos materiais cimentícios reforçados com fibras de vidro (Glass Fibre Reinforced Cement - GRC)." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2007. http://hdl.handle.net/10183/15873.

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Os materiais cimentícios são materiais frágeis que apresentam resistências à tração e capacidades de deformação muito baixas. Uma das formas de contornar a fragilidade destes materiais é a utilização de fibras curtas, descontínuas e dispersas. Um exemplo destes materiais cimentícios são os produzidos com fibras de vidro, comumente denominados pela sigla GRC. Apesar dos diversos avanços apresentados na tecnologia do GRC, ele ainda apresenta uma degradação significativa das suas propriedades ao longo do seu envelhecimento. Além disso, por ser um material que começou a ser produzido em escala ind
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Lee, James. "Characterisation of an advanced fibre reinforced composite material for use in bridge superstructures." Thesis, University of Surrey, 1997. http://epubs.surrey.ac.uk/843946/.

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For the past two decades the suitability of fibre reinforced composite components for use in structural engineering is being realised. As composite materials have a low specific weight and excellent durability characteristics they have now become an attractive alternative to conventional construction materials. Although general acceptance of composites in structural engineering will take time, considerable advances in research and development of these materials are and have been achieved worldwide. A major development in advanced composite technology in recent years has been the refinement of
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41

Pemberton, Sonya Rachel. "Toughening ceramics : optimising the fracture behaviour of metallic fibre reinforced ceramic matrix composites (MFCs)." Thesis, University of Cambridge, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.607820.

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Stig, Fredrik. "An Introduction to the Mechanics of 3D-Woven Fibre Reinforced Composites." Licentiate thesis, Stockholm : Skolan för teknikvetenskap, Kungliga Tekniska högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10235.

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Butcher, Annabel Louise. "Deformation and fracture of soft materials for cartilage tissue engineering." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/277890.

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Damaged cartilage can cause severe pain and restricted mobility, with few long term treatments available. The developing field of tissue engineering offers an alternative to the currently used full joint replacement. Restoring damaged cartilage through tissue engineering would enable an active lifestyle to be recovered and retained, without restrictions to joint mobility. This is increasingly important as the prevalence of osteoarthritis rises. Tissue engineering requires biomaterial scaffolds that mimic the function of the tissue while cells develop, and so the scaffold must provide the appro
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Newby, William Robert. "Environmentally acceptable friction composites." Thesis, University of Exeter, 2014. http://hdl.handle.net/10871/15032.

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Currently, the production of most non-asbestos organic (NAO) friction materials depends on a long and energy intensive manufacturing process and an unsustainable supply of synthetic resins and fibres; it is both expensive and bad for the environment. In this research, a new, more energy efficient, manufacturing process was developed which makes use of a naturally derived resin and natural plant fibres. The new process is known as 'cold moulding' and is fundamentally different from the conventional method. It was used to develop a new brake pad for use in low temperature (<400 °C) applications,
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45

Ferreira, Lizé-Mari. "Green composites from castor oil and renewable reinforcing materials: maleated castor oil-polystyrene matrix reinforced with greige fibre." Master's thesis, Faculty of Engineering and the Built Environment, 2020. http://hdl.handle.net/11427/32255.

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The need to find biodegradable alternatives for common polymer materials has risen due to the increase in pollution (soil and water) and the effects that it has on the ocean and wildlife. Alternatives can be found by turning to plant-based oils, for example castor oil, to be used in the synthesis of a variety of monomers. Castor oil is suitable as it is non-edible; thus its use does not deplete food sources and it has high chemical reactivity. In this study, medical grade castor oil was maleated by the addition of maleic anhydride to form maleated castor oil (MACO). This reaction was performed
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46

Dennis, Grant. "Development of injection moulded self-lubricating short-fibre reinforced composites for use as plain bearing liner materials in aerospace applications." Thesis, Cardiff University, 2016. http://orca.cf.ac.uk/97497/.

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This thesis is concerned with the development of short fibre and particle reinforced polymer composites for plain bearing liners for aerospace applications. Detailed experimental investigations of the tribological and mechanical characteristics of these materials has been completed. The thesis culminates with the identification of two possible materials that have the potential for direct injection moulding of a bearing liner. 1. Developing an Injection moulding process A thorough understanding of the capability of injection moulding PEEK composites was achieved through experimental investigati
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Vilanova, Marco Irene. "Bond-slip and cracking behaviour of glass fibre reinforced polymer reinforced concrete tensile members." Doctoral thesis, Universitat de Girona, 2015. http://hdl.handle.net/10803/328720.

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In this work, a methodology has been developed to implement the bond behaviour between concrete and GFRP bars in the numerical modelling. Based on experimental results and applying the inverse method, the bond law to be used in the numerical model is obtained. The thesis continues with two experimental campaigns on GFRP RC elements under tensile sustained loads. The first experimental campaign consisted in testing GFRP RC elements with different target concrete strengths. The tests were carried out for a period between 35 a 39 days. Experimental results were compared with analytical codes fo
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Liu, Xi Cong. "Microstructure, comportement et endommagement des composites Al203/As7G06 ET Al2O3/As5U3G1." Châtenay-Malabry, Ecole centrale de Paris, 1993. http://www.theses.fr/1993ECAP0312.

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Deux composites Al203/As7G06 et Al203/As5U3G1, élaborés par la voie de squeeze-casting ont été étudiés suivant trois axes: microstructure, comportement et endommagement. Macroscopiquement, la répartition des fibres dans les composites est homogène. Les interfaces f/m dans les composites ayant subi les traitements T6 n'étaient pas suffisamment résistantes. Après un traitement TS, les interfaces ont été renforcées grâce à la diffusion de Mg vers les fibres. Les gains en rigidité et en taux de consolidation des matériaux sont significatifs. Les résistances à rupture des deux composites ayant subi
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Fedorova, Svitlana. "Constitutive Modelling of Composites with Elastomer Matrix and Fibres with Significant Bending Stiffness." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-391300.

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Ulbricht, Andreas, Maik Gude, Daniel Barfuß, Michael Birke, Andree Schwaar, and Andrzej Czulak. "Potential and application fields of lightweight hydraulic components in multi-material design." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-200294.

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Hydraulic systems are used in many fields of applications for different functions like energy storage in hybrid systems. Generally the mass of hydraulic systems plays a key role especially for mobile hydraulics (construction machines, trucks, cars) and hydraulic aircraft systems. The main product properties like energy efficiency or payload can be improved by reducing the mass. In this connection carbon fiber reinforced plastics (CFRP) with their superior specific strength and stiffness open up new chances to acquire new lightweight potentials compared to metallic components. However, complex
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