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Characterization Of Carbon Fiber Polymer Matrix Composites Subjected To Simultaneous Application Of Electric Current Pulse And Low Velocity Impact
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Book Synopsis Characterization of Carbon Fiber Polymer Matrix Composites Subjected to Simultaneous Application of Electric Current Pulse and Low Velocity Impact by : Robert James Hart
Download or read book Characterization of Carbon Fiber Polymer Matrix Composites Subjected to Simultaneous Application of Electric Current Pulse and Low Velocity Impact written by Robert James Hart and published by . This book was released on 2011 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of composite materials in aerospace, electronics, and wind industries has become increasingly common, and these composite components are required to carry mechanical, electrical, and thermal loads simultaneously. A unique property of carbon fiber composites is that when an electric current is applied to the specimen, the mechanical strength of the specimen increases. Previous studies have shown that the higher the electric current, the greater the increase in impact strength. However, as current passes through the composite, heat is generated through Joule heating. This Joule heating can cause degradation of the composite and thus a loss in strength. In order to minimize the negative effects of heating, it is desired to apply a very high current for a very short duration of time. This thesis investigated the material responses of carbon fiber composite plates subjected to electrical current pulse loads of up to 1700 Amps. For 32 ply unidirectional IM7/977-3 specimens, the peak impact load and absorbed energy increased slightly with the addition of a current pulse at the time of an impact event. In 16 ply cross-ply IM7/977-2 specimens, the addition of the current pulse caused detrimental effects due to electrical arcing at the interface between the composite and electrodes. Further refinement of the experimental setup should minimize the risk of electrical arcing and should better elucidate the effects of a current pulse on the impact strength of the specimens.
Book Synopsis Electrical and Impact Characterization of Carbon Fiber Polymer Matrix Composites by : Alan Emad Zantout
Download or read book Electrical and Impact Characterization of Carbon Fiber Polymer Matrix Composites written by Alan Emad Zantout and published by . This book was released on 2009 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electrical and Thermal Behavior of IM7/977-3 Carbon Fiber Polymer Matrix Composites Subjected to Time-varying and Steady Electric Currents by : Phillip Eugene Deierling
Download or read book Electrical and Thermal Behavior of IM7/977-3 Carbon Fiber Polymer Matrix Composites Subjected to Time-varying and Steady Electric Currents written by Phillip Eugene Deierling and published by . This book was released on 2010 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electrical and thermal behavior of the carbon fiber polymer matrix composites subjected to time-varying and steady electric currents is studied. A fully automated experimental setup for real time measurements of the electric current, resistance, voltage, and temperature in carbon fiber polymer matrix composites has been developed. A series of electrical characterization tests on IM7/977-3 unidirectional and symmetric cross-ply composite laminates have been performed and the effects of electric current magnitude and duration, electrical resistance, and associated thermal effects have been investigated. It is determined that voltage-current relationship stays ohmic for up to 50 A steady currents, electrical resistance exhibits time-dependent behavior. It is also found that application of an electric current leads to a significant temperature rise in the composites that is a result of the intense Joule heat produced in the electrically conductive carbon fibers as well as in the composite-electrode contact.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1991 with total page 1460 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Book Synopsis Low Velocity Impact Characterization of Carbon Fiber Reinforced Epoxy Composites Modified with MWCNT/nanoclay Binary Nanoparticles Subjected to Marine Environmental Conditioning by : Md Ekramul Islam
Download or read book Low Velocity Impact Characterization of Carbon Fiber Reinforced Epoxy Composites Modified with MWCNT/nanoclay Binary Nanoparticles Subjected to Marine Environmental Conditioning written by Md Ekramul Islam and published by . This book was released on 2014 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Carbon Fibers by : Plastics and Rubber Institute
Download or read book Carbon Fibers written by Plastics and Rubber Institute and published by William Andrew. This book was released on 1986 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Surface Characterization of Carbon Fiber Polymer Composites and Aluminum Alloys After Laser Interference Structuring by :
Download or read book Surface Characterization of Carbon Fiber Polymer Composites and Aluminum Alloys After Laser Interference Structuring written by and published by . This book was released on 2016 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Here, the increasing use of Carbon Fiber-reinforced Polymer matrix Composites (CFPC) and aluminum alloys as lightweight materials in the automotive and aerospace industries demands enhanced surface preparation and control of surface morphology prior to joining. In this study, surfaces of both composite and aluminum were prepared for joining using an Nd:YAG laser in a two-beam interference setup, enabling the (a) structuring of the AL 5182 surface, (b) removal of the resin layer on top of carbon fibers, and (c) structuring of the carbon fibers. CFPC specimens of T700S carbon fiber, Prepreg - T83 epoxy, 5 ply thick, 0/90o plaques were used. The effect of laser fluence, scanning speed, and number of shots-per-spot was investigated on the removal rate of the resin without an excessive damage of the fibers. Optical micrographs, 3D imaging, and scanning electron microscope (SEM) imaging were used to study the effect of the laser processing on surface morphology.
Book Synopsis Fundamental Studies of Low Velocity Impact Resistance of Graphite Fiber Reinforced Polymer Matrix Composites by : Kenneth J. Bowles
Download or read book Fundamental Studies of Low Velocity Impact Resistance of Graphite Fiber Reinforced Polymer Matrix Composites written by Kenneth J. Bowles and published by . This book was released on 1985 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of Electrical and Impact Properties of Carbon Fiber Reinforced Polymer Matrix Composites with Carbon Nanotube Buckypaper Layers by : Christopher Brandon Hill
Download or read book Investigation of Electrical and Impact Properties of Carbon Fiber Reinforced Polymer Matrix Composites with Carbon Nanotube Buckypaper Layers written by Christopher Brandon Hill and published by . This book was released on 2012 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon fiber reinforced composite materials have become commonplace in many industries including aerospace, automotive, and sporting goods. Previous research has determined a coupling relationship between the mechanical and electrical properties of these materials where the application of electrical current has been shown to improve their mechanical strengths. The next generations of these composites have started to be produced with the addition of nanocarbon buckypaper layers which provide even greater strength and electrical conductivity potentials. The focus of this current research was to characterize these new composites and compare their electro-mechanical coupling capabilities to those composites which do not contain any nanocarbons.
Book Synopsis The Durability Characterization of High Temperature Polymer Matrix - Carbon Fiber Composites for Future Air Force Applications by :
Download or read book The Durability Characterization of High Temperature Polymer Matrix - Carbon Fiber Composites for Future Air Force Applications written by and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Potential critical physical and chemical aging mechanisms in terms of damage initiation and propagation of bismaleimide, BMI and polymide, PI, - carbon fiber composites in future aerospace stress, time temperature moisture chemical service environments will be characterized. This characterization will be conducted on the molecular, microscopic and macroscopic structural levels in order to develop structural performance phase diagrams for mechanics model-structural design analyses and associated materials structural optimization at all dimensional levels.
Book Synopsis Impact Properties of Carbon Fiber Reinforced Polymer Matrix Composites by : Philippe Michael Dekleva
Download or read book Impact Properties of Carbon Fiber Reinforced Polymer Matrix Composites written by Philippe Michael Dekleva and published by . This book was released on 1992 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Rate Dependent and Low Velocity Impact Characterization of Composites by : Timothy Michael Briggs
Download or read book Rate Dependent and Low Velocity Impact Characterization of Composites written by Timothy Michael Briggs and published by . This book was released on 2010 with total page 577 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Experimental Study of Fluid Structure Interaction of Carbon Composites Under Low Velocity Impact by :
Download or read book An Experimental Study of Fluid Structure Interaction of Carbon Composites Under Low Velocity Impact written by and published by . This book was released on 2009 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of fluid force on the natural frequencies and damping ratios of vibrating structures in contact with fluid is known as the Fluid Structure Interaction (FSI) problem. It can be interpreted as an added mass to the vibrating structure in the analysis of the dynamic response. Because the density of water is much greater than air, the added mass effect becomes even more critical in understanding the dynamic response of composites in water surroundings. In this study, experimental testing was carried out to investigate FSI of composite laminates immersed in fluid and subjected to low-velocity impact. Square composite laminates of carbon fiber weave and vinyl ester resin of size 305 mm and 2.38 mm nominal thickness were subjected to low velocity impact loading, using a specially developed vertical drop-weight testing machine. The composite samples were fitted with gages to provide real-time information on strain levels generated during impact. Impact tests were performed on four side clamped laminates in air-backed, water-backed, and dry surroundings, and at various impact energies for investigation. The findings of this study will provide a better understanding for the use of composite materials in underwater structural applications where impact loading is expected.
Book Synopsis Characterization of Carbon Fibers Recovered by Pyrolysis of Cured Prepregs and Their Reuse in New Composites by : Andrea Fernández
Download or read book Characterization of Carbon Fibers Recovered by Pyrolysis of Cured Prepregs and Their Reuse in New Composites written by Andrea Fernández and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The applications of composite materials are rapidly growing. In the aeronautical sector, composites account for up to 50% of the weight of a modern typical commercial aircraft. However, the amount of composites currently recycled is less than 5% of the total amount produced. With environmental concerns becoming an increasingly influential topic, recyclability of composite materials is a key issue. Furthermore, several related European laws have been passed to minimize the environmental impact of composite structures and to make rational use of landfills. In this chapter, the authors analyze recycling techniques for carbon fiber composites with thermoset polymer matrix. The objective is to reuse the fibers in new, lower cost composites with similar properties. Starting from a pyrolysis step, followed by oxidation, an evaluation of the different parameters of the recycling process has been performed. The characterization of the fibers includes tensile tests, scanning electron microscopy, and Raman spectroscopy. The recycled fibers presented a reduction of their initial tensile strength lower than 10%. Then, remanufacturing of laminates using the recycled fibers was achieved by resin film infusion, obtaining laminates with properties similar to the brand-new composites. These results have the potential to be exploited by the automotive, aeronautical, wind energy, construction, and other sectors.
Book Synopsis Impact Behaviour of Fibre-Reinforced Composite Materials and Structures by : S. R. Reid
Download or read book Impact Behaviour of Fibre-Reinforced Composite Materials and Structures written by S. R. Reid and published by Elsevier. This book was released on 2000-10-12 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study covers impact response, damage tolerance and failure of fibre-reinforced composite materials and structures. Materials development, analysis and prediction of structural behaviour and cost-effective design all have a bearing on the impact response of composites and this book brings together for the first time the most comprehensive and up-to-date research work from leading international experts. State of the art analysis of impact response, damage tolerance and failure of FRC materials Distinguished contributors provide expert analysis of the most recent materials and structures Valuable tool for R&D engineers, materials scientists and designers
Book Synopsis Processing and Characterization of Carbon Nanoparticle/fiber-reinforced Polymer Composites by : Alejandro Jose Rodriguez
Download or read book Processing and Characterization of Carbon Nanoparticle/fiber-reinforced Polymer Composites written by Alejandro Jose Rodriguez and published by . This book was released on 2010 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon nanotubes (CNTs) and carbon nanofibers (CNFs) have an exceptional combination of properties that make them ideal materials for use as reinforcing particles in advanced composites. This investigation was aimed at obtaining fundamental understanding of the processing and properties of carbon nanoparticle/fiber-reinforced polymer composites -defined as multiscalereinforced polymer composites (MRPCs)- manufactured through a practical and scalable process. Such process consists of two stages. The first stage involves the synthesis of multiscalereinforcement fabrics (MRFs) by electrophoretic deposition of carboxylic acid- or aminefunctionalized CNTs and CNFs onto the surface of carbon fiber layers in aqueous medium; while the second stage proceeds with the stacking of the MRFs and infusion of the resulting preforms with an epoxy-amine resin system to obtain the MRPC. MRPCs manufactured following the described approach were tested for mechanical and electrical properties. Mechanical test results showed an increase in interlaminar shear strength (ILSS), shear stiffness, and compressive strength of all panels manufactured. Panels containing amine-functionalized carbon nanoparticles had the highest increase in properties: 13% in ILSS, 2.5-4 fold in shear stiffness, and up to 15% in compressive strength. On the other hand, it was found that through-plane electrical conductivity of MRPCs increased by 100% when using unsized MRFs. Investigation into the enhancement mechanism of mechanical and electrical properties was also performed. Discussion of these mechanisms are presented with emphasis placed on the fiber/matrix interface and the load transfer mechanisms between matrix, carbon nanoparticles, and carbon fiber.
Book Synopsis High Performance Composite Materials: Characterization of Carbon Fiber Reinforced Epoxy Matrix Composites with Carbon Nanotubes as Reinforcement Agent Within the Matrix by : Ricardo Andrés Ochoa de la Rosa
Download or read book High Performance Composite Materials: Characterization of Carbon Fiber Reinforced Epoxy Matrix Composites with Carbon Nanotubes as Reinforcement Agent Within the Matrix written by Ricardo Andrés Ochoa de la Rosa and published by . This book was released on 2011 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project is about mechanical characterization of high performance, structural composite materials. Within the context of this project, a commercial, now available epoxy resin reinforced with carbon nanotubes (CNT’s) was compared with a high performance commercially available epoxy resin, also using unidirectional carbon fiber as reinforcement agent. CNT’s are a relatively new, interesting topic to study within the materials science, and because of the potential shown in previous studies, are of utter importance for critical structural applications, such as those found in the aerospace industry. During this project previous references were studied and used as comparison material to design the methodological framework followed in this work. To observe CNT’s benefits, samples tailored to American Society for Testing and Materials (ASTM) standards were manufactured and tested in order to quantify the mechanical properties discussed in this. ASTM standards provide both the sample dimension requirements and the testing procedure to be followed in order to obtain reliable, organized, meaningful data from proposed tests. Tensile, shear and flexural strain-strength tests were performed in samples using both kinds of resins. Data collected from tests was organized, plotted and analyzed to understand mechanical behavior of the samples during the tests. Main engineering values such as ultimate tensile strength, engineering stress, young’s modulus, shear strength and so were gathered and documented in this project. CNT’s reinforced epoxy samples outperformed the common epoxy samples in general, showing a better behavior as seen in the deformation energy absorbed in the samples in each test. It is encouraged to keep the research on the CNT’s topic as a promising and relevant technology called to grow in use and performance in the future, as well as to expand and improve the difficulties and limitations found in this project. This project shows that even when using a low CNT’s content as reinforcement agent within the matrix, evaluated mechanical properties are effectively enhanced, making the CNT’s a good candidate for future composite material components where weight saving and better structural mechanical performance is needed.
