Relevant bibliographies by topics / CNF/Epoxy Glass Fiber

Academic literature on the topic 'CNF/Epoxy Glass Fiber'

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Published: 10 December 2022
Last updated: 29 January 2023

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Journal articles on the topic "CNF/Epoxy Glass Fiber"

1

Chen, Xing Kai. "Research on Properties of CNF/Glass Fiber/Epoxy Composites." Applied Mechanics and Materials 513-517 (February 2014): 161–64. http://dx.doi.org/10.4028/www.scientific.net/amm.513-517.161.

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In the present investigation, carbon nanofibers (CNF) were dispersed in epoxy matrix to form CNF/glass fiber/epoxy composites. Before blending, CNF was oxidated to get more functional groups on CNF and improve the interface combination between resin and CNF, the infrared spectrum was used to test the efficiency. After that, tensile modulus tests were carried on for CNF/glass fiber/epoxy composites with different CNF fractions, the results indicated that there were slight improvements of tensile modulus when adding CNF. At 3.0 wt% of CNF, composites have the high improvement of tensile modulus, but the reinforcement of CNF decreased at 5.0 wt% of CNF. And the CNF reinforcement efficiency was analyzed using modified Coxs model and rule of mixture.
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Taheri-Behrooz, F., M. Esmkhani, and A. Yaghoobi-Chatroodi. "Effect of testing procedure on the in-plane shear properties of CNF/glass/epoxy composites." Polymers and Polymer Composites 28, no. 3 (August 6, 2019): 159–69. http://dx.doi.org/10.1177/0967391119867200.

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Many investigations have demonstrated that the addition of nanoscale particles could affect in-plane shear properties of the laminated composites. Besides, a variety of testing procedures were introduced to evaluate the in-plane shear properties of the multiscale composite materials. In the current research, Iosipescu shear, double V-notched rail, and off-axis tensile testing methods were used to measure in-plane shear modulus and strength of the glass/epoxy and carbon nanofiber (CNF) as 0.25 wt% CNF/glass/epoxy laminated composites. In-plane shear properties of the CNF/glass/epoxy specimens were increased in comparison with the neat glass/epoxy specimens using all three testing procedures. However, the improvements were not identical for all the testing methods. The maximum improvements in the in-plane shear modulus and strength recorded using off-axis tensile test method were as 11% and 15.6%, respectively. In the off-axis tensile test method, all in-plane stress components are activated in the fracture plane parallel to the fiber orientation which are responsible for the failure initiation and propagation. Consequently, enhancing the resin’s mechanical property and interface bonding quality using CNF could remarkably enhance the in-plane shear property of the CNF/glass/epoxy specimens. On the other hand, the special fiber orientation of the specimens in Iosipescu shear and V-notched rail methods prevents the reinforcing effects of the CNF particles to be effectively revealed.
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Rathore, Dinesh Kumar, Rajesh Kumar Prusty, and Bankim Chandra Ray. "An Assessment of Mechanical Performance of CNF Modified Glass Fiber/Epoxy Composites under Elevated Temperatures." Materials Science Forum 978 (February 2020): 311–15. http://dx.doi.org/10.4028/www.scientific.net/msf.978.311.

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The objective of this research is to evaluate the temperature dependent strengthening mechanism of 0.5 wt.% carbon nanofiber reinforced glass fiber/epoxy (CNF-GE) as a function of environmental temperature. Flexural response of the CNF-GE composite has been studied at 30°C, 70°C and 110°C temperatures and compared over control glass fiber/epoxy (GE) composite. When flexural test was conducted at room temperature, CNF-GE composite exhibited about 29% improvement in strength, over control GE composite. With increase in environmental temperature, the extent of strength enhancement continued to decrease and at 110°C, the strength of the CNF-GE composite was found to be about 12% lower than control GE composite. Visco-elastic properties of CNF-GE and control GE composites have also been studied in the temperature range of 40 to 200°C.
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Sarim, Ali, Bo Ming Zhang, and Chang Chun Wang. "Effect of Processing Techniques Used for Improvement of Mechanical Properties of Glass Fiber Epoxy Nano Composites." Applied Mechanics and Materials 332 (July 2013): 363–68. http://dx.doi.org/10.4028/www.scientific.net/amm.332.363.

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The incorporation of carbon nanofibers with a high aspect ratio and extremely large surface area into glass/epoxy polymers improve their mechanical properties significantly. Previously large number of efforts have been made to improve mechanical properties by mixing carbon nanofibers into resin, however, it may raise high viscosities which create difficulties during manufacturing of polymer composite samples. Presently, an attempt has been made to improve mechanical properties of nanocomposites by using, a different technique i.e spraying the Carbon nanoFibers (CNF) on glass fabric layers before impregnating it with epoxy resin. This paper presents influence of two different processing techniques used for manufacturing of polymer nanocomposites. Firstly, solution was prepared to obtain well dispersed epoxy resin filled with 1.0 wt % CNF, to impregnate carbon fabric in a vacuum assisted resin transfer molding (VARTM) setup for sampling. Secondly, the nanocomposite samples were prepared using a spraying methodology i.e dispersing the CNF solution on carbon fabric and followed by VARTM. Tensile, compression and flexural tests were performed to evaluate the effectiveness of CNF addition on the improvement of mechanical properties by using both techniques. Results indicated, CNF addition offered simultaneous increase in mechanical properties in different percentages by using both the processes respectively. SEM analysis of fractured surfaces has also been carried out to examine the micro structural details of in-depth study.
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Wang, Yanlei, Yongshuai Wang, Baoguo Han, Baolin Wan, Gaochuang Cai, and Ruijuan Chang. "In Situ Strain and Damage Monitoring of GFRP Laminates Incorporating Carbon Nanofibers under Tension." Polymers 10, no. 7 (July 16, 2018): 777. http://dx.doi.org/10.3390/polym10070777.

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In this study, conductive carbon nanofibers (CNFs) were dispersed into epoxy resin and then infused into glass fiber fabric to fabricate CNF/glass fiber-reinforced polymer (GFRP) laminates. The electrical resistance and strain of CNF/GFRP laminates were measured simultaneously during tensile loadings to investigate the in situ strain and damage monitoring capability of CNF/GFRP laminates. The damage evolution and conduction mechanisms of the laminates were also presented. The results indicated that the percolation threshold of CNFs content for CNF/GFRP laminates was 0.86 wt % based on a typical power law. The resistance response during monotonic tensile loading could be classified into three stages corresponding to different damage mechanisms, which demonstrated a good ability of in situ damage monitoring of the CNF/GFRP laminates. In addition, the capacity of in situ strain monitoring of the laminates during small strain stages was also confirmed according to the synchronous and reversible resistance responses to strain under constant cyclic tensile loading. Moreover, the analysis of the resistance responses during incremental amplitude cyclic tensile loading with the maximum strain of 1.5% suggested that in situ strain and damage monitoring of the CNF/GFRP laminates were feasible and stable.
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Nisha, M. S., and Dalbir Singh. "Manufacturing of Smart Nanomaterials for Structural Health Monitoring (SHM) in Aerospace Application Using CNT and CNF." Journal of Nano Research 37 (December 2015): 42–50. http://dx.doi.org/10.4028/www.scientific.net/jnanor.37.42.

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In this present work, the experimental study of developing the smart material by using 2 different preparation methods for developing nanomaterial for Glass fiber reinforced polymers (GFRP) in order to determine the structural damage. The first method deals with the development of Fiber mat using PVA-CNF (Poly vinyl Alcohol-Carbon nanoFiber) and PVA-CNT (Poly vinyl Alcohol – Carbon nanoTube) , which is embedded into the GFRP. Second method deals with the dispersion of both CNF and MWCNT with epoxy matrix (sonication process) to manufacture GFRP by using Vacuum Resin Transfer Molding (VARTM) process. Embedding CNT and CNF fiber is easy which does not downgrade the material’s mechanical properties. PVA-CNF and PVA-CNT sensors were placed at various orientations and different wt. % of CNT and CNF fiber mat were manufacture and embedded on the GFRP has been done in first method, and in the second method, dispersion of the CNF-MWCNT with various wt. % in the GFRP composite has been done. The various incremental loading-unloading step had been applied to the manufactured specimens and their corresponding electrical resistance were observed. The electrical conductivity of the fiber sensor and nanomatrix were compared, due to its resistivity effect on the specimens will be monitored and simultaneously the potential for stress/strain and damage monitoring during the mechanical tests can be assessed.
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Sarim, Ali, Bo Ming Zhang, and Chang Chun Wang. "Tensile and Compression Behavior of Woven Glass/Epoxy Nano Composites Based on Spraying Methodology." Applied Mechanics and Materials 446-447 (November 2013): 27–31. http://dx.doi.org/10.4028/www.scientific.net/amm.446-447.27.

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Nanocomposites have been utilized increasingly because of their high strength, stiffness, toughness, and through-thickness properties. The incorporation of carbon nanofibers with a high aspect ratio and extremely large surface area into glass/epoxy polymer composites improve their tensile and compression properties significantly. Although a number of efforts have been made to improve various properties by mixing nanoparticles directly into resin, however, it could lead to high viscosities which create problems during processing. In this particular study, an attempt has been made to investigate tensile and compression behavior of nanocomposites by using, state of the art, a different technique i.e spraying the Carbon nanoFibers (CNF) on dry woven glass pre-form before infusion. The nanocomposite samples were prepared using a spraying methodology i.e dispersing the 2.0 weight percent CNF solution on glass fabric, and evaporating the solvent such that only nanofibers remain on perform, followed by Vacuum Assisted Resin Transfer Molding (VARTM). Tensile and compression tests were performed to evaluate the effectiveness and behavior of CNF addition on these mechanical properties. Results indicated simultaneous improvement in tensile and compression properties by incorporating a very small amount of carbon nanofibers into the matrix system. 1821 percent improvement in tensile strength and 6-9 percent in compressive strength, with respect to the neat composite. The rise in their modulus has also been discussed in detail and part of this study. For in-depth analysis, microscopic approaches were also carried out to investigate the fracture behavior and mechanism of material. Scanning electron microscopy of fractured surfaces revealed improved primary fibermatrix adhesion and indications of CNF-induced matrix toughening due to the presence of CNFs. SEM evaluation also revealed relatively less damage in the tested fracture surfaces of the nanophased composites in terms of matrix failure, fiber breakage, matrixfiber de-bonding, and de-lamination, compared to the neat system.
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Song, Jun Hee. "Manufacturing method of carbon and glass fabric composites with dispersed nanofibers using vacuum-assisted resin transfer molding." e-Polymers 14, no. 5 (September 1, 2014): 345–52. http://dx.doi.org/10.1515/epoly-2014-0091.

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AbstractFiber-reinforced composites have favorable structural characteristics such as their light weight, high specific strength, and high stiffness. Vacuum-assisted resin transfer molding (VARTM), used for manufacturing these composites, is relatively simple and provides materials with excellent mechanical properties. In this study, the author investigated the utility of VARTM in improving the performance of a carbon nanofiber (CNF)/carbon fiber composite impregnated with thermosetting resin. Processing parameters were determined, and the integrity of the manufactured composites was assessed. Carbon and glass fibers were used as reinforcing materials in an epoxy resin matrix. CNFs, which have excellent thermal and electrical characteristics, were dispersed in the composites. The pore sizes using the 0°/90°- and 90°/45° types of laminates were about 45 and 50 μm, respectively. The integrated composites produced had low porosity (below 3.7×10-5%).
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Abasi, Falak O., and Raghad U. Aabass. "Thermo-mechanical behavior of epoxy composite reinforced by carbon and Kevlar fiber." MATEC Web of Conferences 225 (2018): 01022. http://dx.doi.org/10.1051/matecconf/201822501022.

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Newer manufacturing techniques were invented and introduced during the last few decades; some of them were increasingly popular due to their enhanced advantages and ease of manufacturing over the conventional processes. Polymer composite material such as glass, carbon and Kevlar fiber reinforced composite are popular in high performance and light weight applications such as aerospace and automobile fields. This research has been done by reinforcing the matrix (epoxy) resin with two kinds of the reinforcement fibers. One weight fractions were used (20%) wt., Epoxy reinforced with chopped carbon fiber and second reinforcement was epoxy reinforced with hybrid reinforcements Kevlar fiber and improved one was the three laminates Kevlar fiber and chopped carbon fibers reinforced epoxy resin. After preparation of composite materials some of the mechanical properties have been studied. Four different fiber loading, i.e., 0 wt. %, 20wt. % CCF, 20wt. % SKF, AND 20wt. %CCF + 20wt. % SKF were taken for evaluating the above said properties. The thermal and mechanical properties, i.e., hardness load, impact strength, flexural strength (bending load), and thermal conductivity are determined to represent the behaviour of composite structures with that of fibers loading. The results show that with the increase in fiber loading the mechanical properties of carbon fiber reinforced epoxy composites increases as compared to short carbon fiber reinforced epoxy composites except in case of hardness, short carbon fiber reinforced composites shows better results. Similarly, flexural strength test, Impact test, and Brinell hardness test the results show the flexural strength, impact strength of the hybrid composites values were increased with existence of Kevlar fibers, while the hardness was decrease. But the reinforcement with carbon fibers increases the hardness and decreases other tests.
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Kim, Jin Bong, Sang Kwan Lee, and Chun Gon Kim. "Comparison of Carbon-Based Nano Materials as Conductive Fillers for Single Layer Microwave Absorber." Key Engineering Materials 334-335 (March 2007): 837–40. http://dx.doi.org/10.4028/www.scientific.net/kem.334-335.837.

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In this paper, we have studied the permittivities of E-glass fabric/epoxy composite laminates containing three different types of carbon-based nano conductive fillers such as carbon black (CB), carbon nano fiber (CNF) and multi-wall carbon nano tube (MWNT). The measurements were performed for permittivities at the frequency band of 0.5 GHz ~ 18.0 GHz using a vector network analyzer with a 7 mm coaxial air line. The experimental results show that the complex permittivities of the composites depend strongly on the natures and concentrations of the conductive fillers. The real and imaginary parts of the complex permittivities of the composites were proportional to the filler concentrations. But, depending on the types of fillers and frequency band, the increasing rates of the real and imaginary parts with respect to the filler concentrations were all different. At the frequency of 10 GHz, the rates in the CNF filled composite and the MWNT filled composite were much larger then those of the CB filled composite. Between the CNF filled composite and MWNT filled composite, however, the former showed a little higher increasing rates than the other. These different rates can have great effect on the thickness in designing the single layer microwave absorbers. The effect of the different rates was examined by using Cole-Cole plots; the plot is composed of a single layer absorber solution line and permittivity lines of these three types of composites.
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Dissertations / Theses on the topic "CNF/Epoxy Glass Fiber"

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Chen, Yu. "Finite element micromechanical modeling of glass fiber/epoxy cross-ply laminates." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0008/MQ60110.pdf.

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Yang, Bing. "Bending, compression, and shear behavior of woven glass fiber/epoxy composites." Thesis, Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/8710.

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Aussawasathien, Darunee. "ELECTROSPUN CONDUCTING NANOFIBER-BASED MATERIALS AND THEIR CHARACTERIZATIONS: EFFECTS OF FIBER CHARACTERISTICS ON PROPERTIES AND APPLICATIONS." Akron, OH : University of Akron, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=akron1145050541.

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Dissertation (Ph. D.)--University of Akron, Dept. of Polymer Engineering, 2006.
"May, 2006." Title from electronic dissertation title page (viewed 10/11/2006) Advisor, Erol Sancaktar; Committee members, James L. White, Kyonsuku Min, Darrell H. Reneker, Wieslaw Binienda; Department Chair, Sadhan C. Jana; Dean of the College, Frank N. Kelley; Dean of the Graduate School, George R. Newkome. Includes bibliographical references.
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Magrini, Michael A. "Fiber reinforced thermoplastics for ballistic impact." Birmingham, Ala. : University of Alabama at Birmingham, 2010. https://www.mhsl.uab.edu/dt/2010m/magrini.pdf.

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Bilyeu, Bryan. "Characterization of Cure Kinetics and Physical Properties of a High Performance, Glass Fiber-Reinforced Epoxy Prepreg and a Novel Fluorine-Modified, Amine-Cured Commercial Epoxy." Thesis, University of North Texas, 2003. https://digital.library.unt.edu/ark:/67531/metadc4437/.

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Kinetic equation parameters for the curing reaction of a commercial glass fiber reinforced high performance epoxy prepreg composed of the tetrafunctional epoxy tetraglycidyl 4,4-diaminodiphenyl methane (TGDDM), the tetrafunctional amine curing agent 4,4'-diaminodiphenylsulfone (DDS) and an ionic initiator/accelerator, are determined by various thermal analysis techniques and the results compared. The reaction is monitored by heat generated determined by differential scanning calorimetry (DSC) and by high speed DSC when the reaction rate is high. The changes in physical properties indicating increasing conversion are followed by shifts in glass transition temperature determined by DSC, temperature-modulated DSC (TMDSC), step scan DSC and high speed DSC, thermomechanical (TMA) and dynamic mechanical (DMA) analysis and thermally stimulated depolarization (TSD). Changes in viscosity, also indicative of degree of conversion, are monitored by DMA. Thermal stability as a function of degree of cure is monitored by thermogravimetric analysis (TGA). The parameters of the general kinetic equations, including activation energy and rate constant, are explained and used to compare results of various techniques. The utilities of the kinetic descriptions are demonstrated in the construction of a useful time-temperature-transformation (TTT) diagram and a continuous heating transformation (CHT) diagram for rapid determination of processing parameters in the processing of prepregs. Shrinkage due to both resin consolidation and fiber rearrangement is measured as the linear expansion of the piston on a quartz dilatometry cell using TMA. The shrinkage of prepregs was determined to depend on the curing temperature, pressure applied and the fiber orientation. Chemical modification of an epoxy was done by mixing a fluorinated aromatic amine (aniline) with a standard aliphatic amine as a curing agent for a commercial Diglycidylether of Bisphenol-A (DGEBA) epoxy. The resulting cured network was tested for wear resistance using tribological techniques. Of the six anilines, 3-fluoroaniline and 4-fluoroaniline were determined to have lower wear than the unmodified epoxy, while the others showed much higher wear rates.
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Bozkurt, Emrah Tanoğlu Metin. "Mechanical and thermal properties of non-crimp glass fiber reinforced composites with silicate nanoparticule modified epoxy matrix/." [s.l.]: [s.n.], 2006. http://library.iyte.edu.tr/tezler/master/makinamuh/T000517.pdf.

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Thesis (Master)--İzmir Institute of Technology, İzmir, 2006
Keywords: polymer composites, Nanoparticles, glass fiber, mechanical properties, thermal properties. Includes bibliographical references (leaves 75-79).
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Totten, Kyle. "Determination of the tensile strength of the fiber/matrix interface for glass/epoxy & carbon/vinyl ester." Thesis, Florida Atlantic University, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10096031.

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The tensile strength of the fiber/matrix interface was determined through the development of an innovative test procedure. A miniature tensile coupon with a through-thickness oriented, embedded single fiber was designed. Tensile testing was conducted in a scanning electron microscope (SEM) while the failure process could be observed. Finite element stress analysis was conducted to determine the state of stress at the fiber/matrix interface in the tensile loaded specimen, and the strength of the interface. Test specimens consisting of dry E-glass/epoxy and dry and seawater saturated carbon/vinylester 510A were prepared and tested. The load at the onset of debonding was combined with the radial stress distribution near the free surface of the specimen to reduce the interfacial tensile strength (σi). For glass/epoxy, σi was 36.7±8.8 MPa. For the dry and seawater saturated carbon/vinylester specimens the tensile strengths of the interface were 23.0±6.6 and 25.2±4.1 MPa, respectively. The difference is not significant.

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Ertekin, Ayca. "Analysis of Wetting, Flow and End-use Properties of Resin Transfer Molded Nanoreinforced Epoxy-glass Fiber Hybrid Composites." University of Akron / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=akron1203418277.

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Al-Edhari, Mohammed F. "The Influence of Varying Fiber Stacking Sequence on the Tensile, Impact, and Water Absorption Properties of Unidirectional Flax/E-Glass Fiber Reinforced Epoxy Composite." DigitalCommons@USU, 2017. https://digitalcommons.usu.edu/etd/6862.

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This thesis includes the study of the mechanical performance of two different types of fibers reinforced hybrid composites. Two kinds of fibers, natural fiber (flax) and synthetic fiber (E-glass), are used to reinforce epoxy resin. To evaluate the effective properties of the hybrid composites, a micromechanical analysis of the structure genome (SG) of a unidirectional fiber hybrid composites is performed using nite element analysis (FEA). Both fibers are assumed to be circular and packed in a hexagonal pattern. The effects of varying volume fractions and fiber locations, of the two fibers, on the elastic properties of the hybrid composites are studied using FEA. Rule of hybrid mixtures (RoHM) and Halpin-Tsai equations, which are analytical equations, are used as a preliminary prediction of the elastic constants of the hybrid composites. Then, the comparison is made between FEA and analytical results. The predicted elastic constants through numerical homogenization are in good a agreement with analytical results. The effect of changing fiber locations on the tensile strength of hybrid composite is investigated using tensile tests. Impact strength of single fiber composites and ax/glass fiber hybrid composites, in which various stacking sequences of ax and glass fibers are used, are obtained using Charpy impact tests. Moisture absorption test was performed by immersing single fiber composites and various stacking sequences of hybrid composites in deionized water at room temperature for a week. To investigate the effect of water absorption on the tensile properties of composite, tensile test was done on various stacking sequences of the hybrid composite. FEA and analytical equations showed that Young's and shear moduli increased and the axial Poison's ratio decreased linearly with the glass fiber content. Also, FEA showed that changing fiber locations have no effect on the effective properties of the hybrid composite. However, changing fiber stacking sequences showed a significant effect on tensile strength, impact strength, and water absorption properties of the hybrid composites. It was concluded that better design of the hybrid composite was achieved when glass fibers placed on the extreme positions and flax fibers in the middle. Positive hybrid effect is achieved from hybridization of E-glass fiber with flax fiber.
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Papangelou, Christopher G. "Material Properties and Volumetric Porosity of Biomaterials for Use in Hard Tissue Replacement." Scholar Commons, 2005. https://scholarcommons.usf.edu/etd/808.

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Metal implants are a type of hard tissue replacement currently used. Metals used for implants include: stainless steel, titanium, chrome, and cobalt alloys. Such implants often fail at the interface with bone. Metal implants fail when the surface of the implant is coated with an osteoconductive material. An osteoconductive material provides scaffolding for cellular migration, cellular attachment, and cellular distribution. A reason for metal implant failure could be the vastly different material properties than bone. Motivation for the research was to find a suitable bone substitute other than metal. Materials considered were: zirconia toughened alumina, carbon fiber reinforced epoxy, and glass fiber reinforced epoxy. Those materials have been used in previous biological applications and can be cast into complex configurations. Objectives of the study were to compare material properties of the composites to bone. A method to create porosity was then tested in the material that was similar to bone in critical material property. Some of the materials were statistically similar to bone in yield strength. Method to create interconnected porosity in those materials resulted in 49% void space.
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Books on the topic "CNF/Epoxy Glass Fiber"

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Keinanen, Heikki. Interlaminar mode-II fracture toughness of a glass-fiber epoxy laminate. Espoo, Finland: Technical Research Centre of Finland, 1992.

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Monitoring fiber stress during curing of single fiber glass- and graphite-epoxy composites. [Washington, DC]: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Program, 1994.

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United States. National Aeronautics and Space Administration., ed. Ten year-environmental test of glass fiber/epoxy pressure vessels. [Washington, DC]: National Aeronautics and Space Administration, 1985.

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Ten year-environmental test of glass fiber/epoxy pressure vessels. [Washington, DC]: National Aeronautics and Space Administration, 1985.

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Ten year-environmental test of glass fiber/epoxy pressure vessels. [Washington, DC]: National Aeronautics and Space Administration, 1985.

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P, Kosuri Ranga, Bowles Kenneth J, and United States. National Aeronautics and Space Administration. Scientific and Technical Information Program., eds. Monitoring fiber stress during curing of single fiber glass- and graphite-expoxy composites. [Washington, DC]: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Program, 1994.

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C, Smith, Lumban-Tobing F, and Langley Research Center, eds. Analysis of thick sandwich shells with embedded ceramic tiles. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1996.

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An examination of impact damage in glass/phenolic and aluminum honeycomb core composite panels. Washington, D.C: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division, 1990.

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National Aeronautics and Space Administration and NASA. Composite Drill Stem of Epoxy Fiber Glass Reinforced with Boron Filaments and a Retrievable Core Liner/Sample Return Container for the Apollo Lunar Surface Drill: August 1 1970. Independently Published, 2022.

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Kevin, O'Brien T., Rousseau Carl Q, and United States. National Aeronautics and Space Administration., eds. Fatigue life methodology for tapered composite flexbeam laminates. [Washington, DC: National Aeronautics and Space Administration, 1997.

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Book chapters on the topic "CNF/Epoxy Glass Fiber"

1

Alsarayefi, Saad, and Károly Jálics. "Micromechanical Analysis of Glass Fiber/Epoxy Lamina." In Vehicle and Automotive Engineering 3, 101–11. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-9529-5_9.

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Zeleke, Abebe, and Hailu Shimels Gebremedhen. "Characterization of Sisal-Glass Fiber Reinforced Epoxy Hybrid Composite." In Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 341–56. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-80618-7_23.

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Neves, Roberta M., Francisco M. Monticeli, José Humberto S. Almeida, and Heitor Luiz Ornaghi. "Hybrid Vegetable/Glass Fiber Epoxy Composites: A Systematic Review." In Composites Science and Technology, 1–53. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-1854-3_1.

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Tsai, Jia Lin, Jui Ching Kuo, and Shin Ming Hsu. "Fabrication and Mechanical Properties of Glass Fiber/Epoxy Nanocomposites." In Materials Science Forum, 37–42. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-990-3.37.

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Hsieh, K. H., S. T. Lee, D. C. Liao, D. W. Wu, and C. C. M. Ma. "Glass-Fiber Composites from Polyurethane and Epoxy Interpenetrating Polymer Networks." In Interpenetrating Polymer Networks, 427–46. Washington, DC: American Chemical Society, 1994. http://dx.doi.org/10.1021/ba-1994-0239.ch021.

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Kumari, Punita, Ashraf Alam, and Saahil. "Mechanical Properties Enrichment of Glass Fiber Epoxy by Sugarcane Baggage." In Lecture Notes in Mechanical Engineering, 203–12. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-4140-5_17.

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Chaudhary, Arun Kumar, Prakash Chandra Gope, and Vinay Kumar Singh. "Studies on Fracture Performance of Bio-fiber-Silica-glass Fiber Reinforced Epoxy Hybrid Composites." In Experimental and Applied Mechanics, Volume 6, 363–68. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4614-0222-0_44.

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Sonker, Tripti, Ajaya Bharti, and Pranshu Malviya. "Tensile and Fatigue Behavior of Glass Fiber Laminated Aluminum-Reinforced Epoxy Composite." In Advances in Lightweight Materials and Structures, 319–28. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-7827-4_32.

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Shinde, Rajaram M., Suresh M. Sawant, and L. B. Raut. "Design and Optimization of Epoxy/Glass Fiber Drive Shaft for Passenger Vehicle." In Techno-Societal 2018, 987–98. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-16962-6_97.

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Gassan, J. "Influence of fiber-matrix adhesion on the fatigue behavior of cross-ply glass-fiber epoxy composites." In Recent Developments in Durability Analysis of Composite Systems, 109–12. London: CRC Press, 2021. http://dx.doi.org/10.1201/9781003211181-14.

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Conference papers on the topic "CNF/Epoxy Glass Fiber"

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SARR,, MOUHAMADOU MOUSTAPHA, HIRAKU INOUE, and TATSURO KOSAKA. "IMPROVEMENT OF FLEXURAL STRENGTH AND FATIGUE PROPERTIES OF GLASS FIBER/EPOXY COMPOSITES BY GRAFTING CELLULOSE NANOFIBERS ONTO THE REINFORCING FIBERS." In Thirty-sixth Technical Conference. Destech Publications, Inc., 2021. http://dx.doi.org/10.12783/asc36/35866.

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Recently, cellulose nanofibers (CNFs) have been added as a modifier to fiber- reinforced polymer composites (FRPs) to improve their mechanical performance. In this study, vacuum impregnation of CNFs onto glass fibers (GF) was proposed to avoid processing high viscosity resin or the formation of aggregations in the matrix. Therefore, different CNF concentrations (from 0 to 0.1 wt%) were prepared and used to investigate the effect of CNFs on flexural properties of GF-CNF/epoxy composites by three-point bending tests. A field-emission scanning electron microscope was used to characterize the strengthening mechanisms. Fatigue tests were conducted at a stress ratio of 0.1 and a frequency of 5 Hz. The results indicated an improvement in flexural properties of glass fiber-reinforced polymer with increasing CNF concentrations. The flexural strength of CNF-modified GF/Epoxy composites (GF-CNF/EP) increased slightly up to 6 %. However, the fatigue life was significantly improved by 5 times in comparison with the neat GF/epoxy composite. This suggested that the use of CNFs onto the GF surface can contribute to improving the flexural fatigue of GFRP. Mouhamadou
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Kawada, H., S. Sato, and M. Kameya. "Modification of the Interface in Carbon Nanotube-Grafted T-Glass Fiber." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-89318.

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In recent years, carbon nanotubes (CNTs) have attracted a lot of interest as an additional component in fiber reinforced plastics (FRP) to improve the properties of the fiber/matrix interface. An improvement of the apparent interfacial shear strength (ISS) was achieved by grafting CNTs onto reinforcement fibers instead of dispersing CNTs in the matrix. In one study, composites containing CNT-grafted fibers and epoxy resin demonstrated 26% ISS improvement over the baseline composites. However, few studies are focused on glass fibers, due to their low heat resistance. In this study, the effects of grafting CNTs onto T-glass fibers were evaluated by investigating the mechanical and interfacial properties of the CNT-grafted fiber/epoxy resin model composites. Elastic shear-lag analysis was also used to investigate the effect of CNTs on ISS. We used the chemical vapor deposition (CVD) method to graft CNTs onto T-glass fibers. As a result, CNTs were grafted relatively uniformly and cylindrically onto the fibers, which indicates that the CNT-grafting process was appropriate. The CNT-grafted fiber/epoxy resin model composites showed a significant (46∼67%) increase of interfacial shear strength. The formation of an interfacial region containing CNTs was observed around each fiber. Elastic shear-lag analysis showed a 20% increase of ISS. Those results imply that the elastic modulus of the interfacial region around the fibers was higher than that of epoxy resin.
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Aussawasathien, Darunee, and Erol Sancaktar. "Mechanical Properties of Electrospun Carbon Nano Fiber (ECNF)/Epoxy Nanocomposites." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-34403.

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Electrospun polyacrylonitrile (PAN) fiber precursor based Carbon Nanofiber (CNF) mats were produced and impregnated with epoxy resin. The mechanical properties of as-prepared nanofibers in the mat and short fiber filled epoxy nanocomposite forms were determined to demonstrate the effect of fiber aspect ratio and interconnecting network on those properties. Our experimental results reveal that epoxy nanocomposites containing Electrospun Carbon Nano Fibers (ECNF) with high fiber aspect ratio and high interconnecting network in the non-woven mat form yield better mechanical properties than those filled with short ECNFs. The ECNF mat in epoxy nanocomposites provides better homogeneity, more interlocking network, and easier preparation than short ECNFs. Mechanical properties of ECNF mat-epoxy nanocomposites, which we obtained using tensile and flexural tests, such as stiffness and modulus increased, while toughness and flexural strength decreased, compared to the neat epoxy resin. Dynamic Mechanical Analysis (DMA) results showed, higher modulus for ECNF mat-epoxy nanocomposites, compared to those for neat epoxy resin and short ECNF-epoxy nanocomposites. The epoxy nanocomposites had high modulus, even though the glass transition temperature, Tg values dropped at some extents of ECNF mat contents when compared with the neat epoxy resin. The cure reaction was retarded since the amount of epoxy and hardener decreased at high ECNF contents together with the hindering effect of the ECNF mat to the diffusion of epoxy resin and curing agent, leading to low crosslinking efficiency.
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Jain, Rajan, Hashim Hassan, Weinong Chen, Tyler N. Tallman, and Nesredin Kedir. "Electrical Self-Sensing of Pulsed Laser Ablation in Nanofiller-Modified Composites." In ASME 2021 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/smasis2021-67779.

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Abstract Laser-to-composite interactions are becoming increasingly common in diverse applications such as diagnostics, fabrication and machining, and weapons systems. Despite a lack of physical contact, lasers can induce seemingly imperceptible structural damage to materials. In safety-critical venues like aerospace, automotive, and civil infrastructure where composites are playing an increasingly prominent role, it is desirable to have means of sensing laser exposure on a composite material. Self-sensing materials may be a powerful method of addressing this need. Herein, we present an initial exploratory study on the potential of using changes in electrical measurements as a way of detecting laser exposure to a carbon nanofiber (CNF)-modified glass fiber/epoxy laminate. CNFs were dispersed in liquid epoxy resin prior to laminate fabrication via hand layup. The dispersed CNFs form a three-dimensional conductive network which allows for electrical measurements to be taken from the traditionally insulating glass fiber/epoxy material system. It is expected that damage to the network will disrupt the electrical pathways, thereby causing the material to exhibit slightly higher resistance. To test laser sensing capabilities, a resistance baseline of the CNF-modified glass fiber/epoxy was first established before laser exposure. The specimens were then exposed to an infra-red laser operating at 1064 nm, 35 kHz, and pulse duration of 8.2 ns. The specimens were irradiated for a total of 20 seconds (4 exposures each at 5 seconds). The resistances of the specimens were then measured again post-ablation. It was found that the average resistance increased by about 18 percent. This established that the laser was indeed causing damage to the specimen sufficient to evoke a change in electrical properties. To expand on this result, electrical impedance tomography (EIT) was employed for localization of 1, 3, and 5-second laser exposure on a larger specimen. EIT was not only successful in detecting damage that was virtually imperceptible to the human-eye, but it also accurately localized the exposure sites. The post-ablation conductivity of the exposure sites decreased in a manner that was comparable to the resistance increases obtained during prior resistance change testing. Based on this preliminary study, this research could lead to the development of a real-time exposure detection and tracking system for the measurement, fabrication, and defense industries.
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Karnik, I. T., and T. N. Tallman. "The Effect of Fatigue Loading on Electrical Impedance in Open-Hole Carbon Nanofiber-Modified Glass Fiber/Epoxy Composites." In ASME 2020 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/smasis2020-2220.

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Abstract Composite materials are ideal for many weight-conscious applications such as aerospace and automotive structures because of their exceptionally high specific properties. However, composite materials are susceptible to complex damage and difficult-to-predict damage growth. This necessitates the application of structural health monitoring (SHM) for in-operation monitoring of damage formation and accumulation. Self-sensing materials are strong candidates for composite SHM because they do not suffer from limitations associated with traditional, point-based sensors. A common approach to self-sensing is the piezoresistive effect in nanofiller-modified materials. To date, work in the area of self-sensing via the piezoresistive effect has focused overwhelmingly on the direct current (DC) response of these materials. This is an important limitation because alternating current (AC) effects inherently provide more information by relating both impedance and phase to damage. Therefore, this work explores the effect of high-cycle fatigue loading on the AC response of carbon nanofiber (CNF)-modified glass fiber/epoxy laminates. Specifically, impedance magnitude and phase angle are both measured through the thickness and along the length of a tension-tension fatigue-loaded specimen with an open-hole stress concentration as a function of load cycle and up to 10 MHz. The collected impedance data is then fit to an equivalent circuit model and correlated to stiffness changes. This means that changes in equivalent circuit behavior can be used to track fatigue-induced softening in self-sensing composites. In light of these promising preliminary results, AC effects appear to have considerable potential for real-time tracking of damage accumulation.
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Shrigandhi, Ganesh, Mihil Shah, and Basavaraj S. Kothavale. "First-Ply Failure Pressure of Symmetric Laminated Hybrid Composite CNG Tank." In ASME 2021 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/imece2021-70945.

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Abstract In recent years, compressed natural gas (CNG) as a fuel for the automobile is overgrowing, as it is cheap and environmental friendly compared to gasoline and diesel fuel. To improve fuel efficiency, lightweight composite pressure vessel tanks are used for the storage of CNG. Due to high specific strength, fiber-reinforced composites are most widely used. Synthetic fibers like carbon, glass fiber are used for the fabrication of these pressure vessels. In the last few decades, due to environmental concerns, the hybridization of synthetic fiber with natural fiber has gained the attention of researchers. This paper focuses study on the effect of adding natural fiber on first ply failure (FPF) pressure based on the Tsai-Wu failure criterion. The laminate stacking sequence on first ply failure pressure for carbon/epoxy, E-glass/epoxy, and hybridization of these fibers with abaca fiber is studied. Abaca is strongest among other natural fibers as it contains high cellulose which is responsible for strength of the fiber. CNG tank with a 30-liter capacity, inside diameter 261mm, thickness 12 mm, applied pressure of 25 MPa with both ends closed is considered. Stacking sequence of symmetric laminate [(90)2/∓θ/(90)2]S, for different orientation of helical winding i.e. θ = 15°, 25°, 35°, 45°, 55°, 60°, 75° is analysed for these composite materials. A hybrid tube made of synthetic and natural fiber with uniform thickness is considered. The simulation results of the first ply failure pressure are compared with theoretical results. Autodesk Helius Composite software is used for calculating material properties and, first, ply failure analysis. It is observed that burst pressure decreases as helical angle θ increases, and for the stacking sequence of [(90)2/∓15°/(90)2]S burst pressure is maximum for all tubes. The Burst pressure of the hybrid carbon/Abaca tube reduces by 69.5% to 42% for winding angle between 15° to 45° compared to standard carbon tube. For hybrid E-Glass/Abaca tube, burst pressure reduction was 21% to 4.7% for winding angle between 15° to 45° compared to standard E-Glass tube. For hybrid Carbon/Abaca tube, the drop in burst pressure is less 23.7% to 1.74%, respectively, compared to carbon tube for helical angle in the range 55° to 75°. Slight improvement in burst pressure (1.14% to 7.5%) is observed for the helical angle between 55° to 75° in the case of a hybrid E-Glass/Abaca tube compared to the E-Glass tube only. For the E-Glass tube, intermediate lamina can be replaced by Abaca fiber.
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Vairis, Achilles, Nikolaos D. Alexopoulos, Evangelos P. Favvas, and Stefanos Nitodas. "Strain Sensing of Glass Fiber Reinforced Coupons by Using Carbon Nanotube Doped Resin." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-63805.

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Addition of different percentages of multi-wall carbon nanotubes (MWCNTs) on the mechanical behaviour of epoxy resin as well as glass fiber composite with symmetrical stacking sequence is assessed. GFRPs were manufactured with the vacuum assisted resin infusion (VARI) process. Performed tensile tests showed that the addition of the CNTs increased the modulus of elasticity with a simultaneously dramatic ductility decrease. The real merit of the CNT addition is the enhancement the composites multi-functionability; piezo-resistivity was recorded to further exploit the self-sensing ability of the innovative composites.
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Ikikardaslar, Kerim Tuna, Mahmoud K. Ardebili, and Feridun Delale. "Sensing Artificial Hole and Crack in Carbon Nanotube Enhanced Glass-Fiber Reinforced Composite Panel." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-71516.

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Glass fabric epoxy resin based composite panels enhanced with carbon nanotubes were subjected to damage while changes in electrical resistance were obtained via embedded electrodes. The purpose of the study was to develop an alternative method to Electrical Impedance Tomography (EIT), which generates conductivity field, hence, indicating presence of various damages. The current method provides damage field by taking meticulous measurements of electrical resistance of panel. The method does not monitor conductivity as in the EIT but utilizes electrical resistance changes to detect damage. In the current form, it employs a network of 64 (8 × 8 grid) electrodes distributed evenly in a typical panel instead of the boundary electrodes used in EIT. Even though 64 electrodes were employed, fewer electrodes were sufficient to produce accurate indication of damage location and its size. In previous studies percolation threshold for carbon nanotube-epoxy mixture was determined, which enabled selection of optimal CNT concentration used in manufacturing of glass fiber reinforced panels. The glass fiber reinforced panels were manufactured by vacuum infusion method. The typical panel consisted of 10 glass fabric (S-2) plies. Copper electrodes were embedded beneath the top layer fabric ply. Electrical resistances measurements were obtained using four-probe technique. In the four-probe method, two outer electrodes are used to source a known current through the panel, while the two inner electrodes provide voltage drop needed to compute resistance. The technique minimizes contact resistance between electrodes and the composite, which could be order of magnitude larger than the material resistance being measured. Electrical resistance of cured glass fiber reinforced CNT-epoxy panels was first measured without any damage. Afterwards, damages in form of circular hole were inflicted to the panel starting with 1/8” diameter and enlarging it to 1/2” in steps of 1/8”. After the largest hole, 0.04” (∼1 mm) width cracks emanating from the hole were inflicted. During all measurements, electrical current passing through the source and sink electrodes was kept constant and changes in voltage from the inner probes were recorded. The thrust of the method is to incorporate a curve fit for quantifying the changes in resistance. The method can be applied to damage quantification in panels. The smaller spaced electrode distribution was more sensitive to smaller damages as expected, but the larger spaced electrodes network was sufficiently responsive to smallest damage. Experimental results were fairly good at predicting the damage and its magnitude. Results also indicated a very good agreement with the finite element simulations of the panels. Application of this technique can be a powerful tool for real time structural health monitoring of manufactured composites.
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SUNG, DAE HAN, SAGAR M. DOSHI, ANDREW N. RIDER, and ERIK T. THOSTENSON. "CURE BEHAVIOR OF NANOSTRUCTURED HIERARCHICAL COMPOSITES WITH FUNCTIONALIZED CARBON NANOTUBES." In Thirty-sixth Technical Conference. Destech Publications, Inc., 2021. http://dx.doi.org/10.12783/asc36/35895.

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Electrophoretic deposition is a promising technique to hybridize nanomaterials with conventional reinforcing materials for multifunctional applications. It utilizes the principle of electrophoresis, where electric potential drives charged particles dispersed in a liquid towards counter-charged substrates. Polymer matrix can be infused into the hybridized fibers to produce hierarchical polymer composites with reinforcements spanning several orders of magnitude in scale. This research addresses a key challenge associated with nanostructured composites produced by first dispersing the nanoscale reinforcement into the polymer matrix and then infusing into the fiber reinforcement (direct mix/infusion method). The key limitation is on the volume fraction of the nanoscale particles due to the drastic increase of the resin viscosity and the potential filtering effect of the particles during resin infusion. Our model system consists of an aqueous dispersion of carbon nanotubes (CNT) functionalized with a cationic polymer, polyethyleneimine (PEI), non-conductive glass fabric and epoxy resin. Amine functional groups of PEI are protonated under mildly acidic conditions, producing positively charged CNTs. A stable dispersion is formed through repulsive electrostatic forces among charged CNTs, which also facilitates deposition under applied electric fields. CNT-PEI films uniformly deposited via EPD on each filament throughout the fabric form a unique interface between reinforcing fiber and epoxy matrix. Concentrated amines from CNT-PEI coatings possibly alter the curing mechanism of infused epoxy resin, thereby creating the graded mechanical properties at the interface. In this study, curing kinetics and thermomechanical properties of epoxy resin are investigated with added PEI which provides stoichiometrically excessive amines. It is expected that the curing temperature profile can be designed to optimize the interfacial properties of electrophoretically processed CNT-PEI multiscale composites.
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MANOHARAN, NITHINKUMAR, and SUHASINI GURURAJA. "EFFECT OF CONTROLLED LOCAL MICROSTRUCTURAL MODIFICATION OF GLASS FIBER EPOXY COMPOSITES ON PROGRESSIVE DAMAGE PROPAGATION UNDER TENSILE LOADING." In Proceedings for the American Society for Composites-Thirty Seventh Technical Conference. Destech Publications, Inc., 2022. http://dx.doi.org/10.12783/asc37/36440.

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Advanced composite materials are defined by hierarchical, heterogeneous, and anisotropic behavior, resulting in complex, multi-scale progressive damage mechanisms, making failure predictions even under simple loading a challenging task. With the widespread usage of polymer composites for structural applications, holes, notches, and other geometric features are often needed for assembly and other functional requirements necessitating improvements to the local architecture around the holes to alleviate associated stress concentration effects. Multiwalled carbon nanotubes (MW-CNTs) when incorporated with epoxy matrix have shown to increase the open-hole tensile (OHT) strength of unidirectional glass fiber reinforced plastic (UD-GFRP) laminates by altering the inherent damage mechanisms. To assess the incipience of damage in MW-CNT modified UD-GFRP laminates, X-ray microcomputed tomography (CT) of the specimen before and after failure have been carried out in the current work. Future work is ongoing to perform in situ tensile testing assisted with X-ray micro-CT to have a better understanding of damage evolution in the specimens.
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Reports on the topic "CNF/Epoxy Glass Fiber"

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Wang, Timothy W., and Frank D. Blum. Interfacial Mobility and Its Effect on Flexural Strength and Fracture Toughness in Glass-Fiber Fabric Reinforced Epoxy Laminates. Fort Belvoir, VA: Defense Technical Information Center, November 1994. http://dx.doi.org/10.21236/ada288344.

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