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    Wyświetlanie 1-12 z 12
    Tytuł:
    A Comparative Study of Tribological Behavior of Moglice and DK-6(PT) Composites
    Autorzy:
    Pashechko, Mykhailo
    Ishchenko, Аnatoliy
    Radionenko, Aleksandr
    Kindrachuk, Myroslav
    Tisov, Oleksandr
    Powiązania:
    https://bibliotekanauki.pl/articles/2022309.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    polymer matrix composites
    friction coefficient
    wear
    tribometer
    hardness
    Opis:
    Authors have produced new polymer-based composite material DK-6(PT) for substitution of Moglice (Diamant) polymer. We manufactured and used sliding-friction test apparatus (pin-on-disc) capable of testing three specimens simultaneously, much reducing time for the test. The monitoring of the material curing process and the Shore hardness test indicate minor difference from reference material. Measurements were carried out during the curing period, since it is important to know change in this parameter over time. The wear test proved that DK-6(PT) composite in the long-time test has good wear resistance: over 80 km of the friction path, the wear loss of both materials is approximately the same. Furthermore, the friction factor of DK-6(PT) is 5–10% less than that of Moglice. Thus, the studied new polymeric composite may compete with well-known material Moglice and significantly cut the expenses for reconditioning of worn slide ways of metal working equipment.
    Źródło:
    Advances in Science and Technology. Research Journal; 2022, 16, 1; 149-157
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improving Sound Absorption Property of Polyurethane Foams by Adding Tea-Leaf Fibers
    Autorzy:
    Ekici, B.
    Kentli, A.
    Kücük, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/176664.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    fibers
    polymer-matrix composites
    sound absorption
    tea-leaf
    luffa-cylindrica
    Opis:
    The sound absorption property of polyurethane (PU) foams loaded with natural tea-leaf fibers and luffa cylindrica (LC) has been studied. The results show a significant improvement in the sound absorption property parallel to an increase in the amount of tea-leaf fibers (TLF). Using luffa-cylindrica as a filler material improves sound absorption properties of soft foam at all frequency ranges. Moreover, an increase in the thickness of the sample resulted in an improvement of the sound absorption property. It is pleasing to see that adding tea-leaf fibers and luffa-cylindrica to the polyurethane foam demonstrate a significant contribution to sound absorption properties of the material and it encourages using environmental friendly products as sound absorption material in further studies.
    Źródło:
    Archives of Acoustics; 2012, 37, 4; 515-520
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of material parameters for microbuckling analysis of fiber reinforced polymer matrix composites
    Autorzy:
    Romanowicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/265194.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    polymer-matrix composites
    buckling
    micromechanics
    finite element analysis
    kompozyty z matrycą polimerową
    wyboczenie
    mikromechanika
    metoda elementów skończonych
    Opis:
    This research focuses on studying the effect of the constitutive law adopted for a matrix material on the compressive response of a unidirectional fiber reinforced polymer matrix composite. To investigate this effect, a periodic unit cell model of a unidirectional composite with an initial fiber waviness and inelastic behavior of the matrix was used. The sensitivity of the compressive strength to the hydrostatic pressure, the flow rule and the fiber misalignment angle were presented. The model was verified against an analytical solution and experimental data. Results of this study indicate that a micromechanical model with correctly identified material parameters provides a useful alternative to theoretical models and experimentation.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2015, 20, 2; 373-383
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biodegradable Poly(Lactic Acid)/Multiwalled Carbon Nanotube Nanocomposite Fabrication Using Casting And Hot Press Techniques
    Wytwarzanie biodegradowalnych nanokompozytów typu poli(kwas mlekowy)/wielościenne nanorurki węglowe technikami odlewania i prasowania na gorąco
    Autorzy:
    Park, S. G.
    Abdal-Hay, A.
    Lim, J. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/356593.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    CNTs
    biodegradable polymer
    advanced polymer matrix composites
    hot press
    mechanical properties
    polimer biodegradowalny
    zaawansowane kompozyty polimerowe
    prasowanie na gorąco
    właściwości mechaniczne
    Opis:
    Biodegradable advanced polymer composites have recently received a large amount of attention. The present study aimed to design poly(lactic acid) multiwalled carbon nanotube nanocomposites (PLA/MWCNTs) using a simple fabrication technique. A PLA sheet was first dissolved in dichloromethane, and MWCNTs were subsequently added at various concentrations (0.5, 1.5 and 5%) while applying shear strain stirring to achieve dispersion of carbon nanotubes (CNTs). These solutions were then molded and a hot press was used to generate sheets free of voids with entrapped solvent. The prepared samples were characterized using field emission scanning electron microscopy (FE-SEM), x-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA). Our data showed composite samples free of defects and voids, indicating that the hot press is capable of generating sufficiently compact polymer matrices. Additionally, TGA and FTIR showed significant bonding interactions between the PLA matrix and the nano-fillers. Collectively, our results suggest that incorporation of CNTs as nano-fillers into biodegradable polymers may have multiple applications in many different sectors.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 2B; 1557-1559
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Indentation Hardness and Tribological Wear under the Conditions of Sliding Friction of the Surface Layer of Composites Based on Methacrylate Resins with Ceramic Nanofiller
    Autorzy:
    Pieniak, Daniel
    Gauda, Konrad
    Powiązania:
    https://bibliotekanauki.pl/articles/101963.pdf
    Data publikacji:
    2020
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    nanocomposites
    polymer matrix ceramic composites
    indentation hardness
    wear
    nanokompozyty
    kompozyty ceramiczne z osnową polimerową
    twardość wgłębienia
    zużycie
    Opis:
    The biomaterials, which are the subject of this work, are the dental restorative materials classified as light cured polymer matrix ceramic composites or resin based composites. The dental composite materials are needed for the repairment of human teeth. Fillings and other dental applications are exposed to the biomechanical loading in the chewing process. The wear resistance and hardness are important functional properties. Currently, nanofiller composites play an important role among dental composites. The objective of this paper was to study and analyze the friction, mechanical and wear properties of the surface of polymer matrix ceramic filed nanocomposites. Three material groups were used, one commercial composite Filek Z550 (3M ESPE, USA) and two experimental composites Ex-nano(G) and Ex-flow(G). The microindentation tests were conducted on the Micro Combi Tester device (Anton Paar GmbH, Germany). Rotating sliding ball-on-disc friction tests were performed against an alumina ball on 5 N load at 1 Hz in the bath of artificial saliva at 37°C. The linear wear and friction coefficients were evaluated. In the light of the obtained results of contact and friction strength tests, it was found that the performance depends on the production technology of the polymer-ceramic composites. The test results indicate that the share of filler nanoparticles the in experimental composites is advantageous due to the tribological wear.
    Źródło:
    Advances in Science and Technology. Research Journal; 2020, 14, 2; 112-119
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical and Experimental Analysis for Shape Improvement of a Cruciform Composite Laminates Specimen
    Numeryczna i eksperymentalna analiza poprawy kształtu próbek o kształcie krzyżowym wykonanych z laminatu
    Autorzy:
    Gutiérrez, J. C.
    Lozano, A.
    Manzano, A.
    Flores, M. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/234347.pdf
    Data publikacji:
    2016
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    polymer-matrix composites
    PMC
    mechanical properties
    finite element analysis
    FEA
    non-destructive testing
    Biaxial testing
    cruciform specimen
    kompozyty z matrycą polimerową
    właściwości mechaniczne
    analiza metodą elementów skończonych
    badania nieniszczące
    testowanie dwuosiowe
    Opis:
    The use of composite materials has spread to different applications among which, those using thin sheet plates subjected to biaxial loads are commonly used in the car and aerospace industries. Hence, there is need of a reliable specimen to test these materials under biaxial loads. This reliability depends on measurements that are accurate and repeatable. Thus these measurements depend on the proper design of specimens. This paper reviews the development of cruciform specimens of carbon fibre composite materials and how the geometric shape has evolved. Based on this review, a new geometric shape is proposed. This improvement is based on numerical analysis of the specimen and tests results of experimental measurements carried out using a four piston rig in an orthogonal arrangement. Deformation is measured in the centre of the specimen using strain gauges. By obtaining the principal stresses, it was found that maximum stresses occur in the centre of the specimen.
    Powszechnie stosowane są kompozyty poddawane testom dwuosiowym. Prawidłowe przeprowadzenie tego rodzaju testów jest trudne biorąc pod uwagę rozkład naprężeń badanych w próbce. Omówiono szereg struktur stosowanych dla uzyskania wyników dokładnych i powtarzalnych. Przeprowadzono analizę poprawy kształtu próbki rozpatrując laminat z udziałem włókien węglowych i żywicy epoksydowej. Przeprowadzono testy rozciągania dwuosiowego. Odkształcenia mierzono w centralnej części próbki stosując specjalne czujniki przesunięcia. Stwierdzono, że maksymalne naprężenia występują w środku próbki.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2016, 2 (116); 89-94
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dynamic mechanical analysis and thermal analysis of untreated Coccinia indica fiber composites
    Dynamiczna analiza mechaniczna i analiza termiczna kompozytów z niepoddanymi obróbce włóknami Coccinia indica
    Autorzy:
    Balu, S.
    Sampath, P. S.
    Bhuvaneshwaran, M.
    Chandrasekar, G.
    Karthik, A.
    Sagadevan, Suresh
    Powiązania:
    https://bibliotekanauki.pl/articles/945874.pdf
    Data publikacji:
    2020
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
    Tematy:
    polymer matrix composites
    Coccinia indica fiber (CIF)
    compression molding
    DMA
    TGA
    Coccinia indica fiber reinforced composites (CIFRCs)
    kompozyty na osnowie polimerowej
    włókno Coccinia indica (CIF)
    formowanie metodą wytłaczania
    kompozyty wzmocnione włóknem Coccinia indica (CIFRC)
    Opis:
    A natural fiber reinforced polymer matrix composites (FRCs) was prepared by the compression molding method. The natural fiber named Coccinia indica (CI) was employed to fabricate FRCs. The impact of fiber length on storage modulus, loss modulus and loss of weight in the FRCs were determined using dynamic mechanical analysis (DMA) and thermogravimetric analysis (TGA). The results revealed that a fiber length of 40 mm shows better storage modulus and nominal loss modulus owing to the higher interfacial bonding between fiber and matrix. In other investigated fiber lengths, the storage modulus is poor and loss modulus is high, which is due to inefficient stress transfer.
    Metodą wytłaczania przygotowano próbki kompozytów (FRC) na osnowie polimerowej wzmocnionej włóknami naturalnymi Coccinia indica (CI). Wpływ długości zastosowanych włókien na moduł zachowawczy, moduł stratności i ubytek masy badanych FRC oceniano za pomocą dynamicznej analizy mechanicznej (DMA) i analizy termograwimetrycznej (TGA). Stwierdzono, że kompozyty z udziałem włókien o długości 40 mm wykazują korzystniejszy moduł zachowawczy i nominalny moduł stratności, dzięki lepszemu wiązaniu międzyfazowemu włókna z osnową. W wypadku kompozytów z zawartością włókien o innych długościach moduł zachowawczy jest mały, a moduł stratności duży, co wynika z nieefektywnego przenoszenia naprężeń.
    Źródło:
    Polimery; 2020, 65, 5; 357-362
    0032-2725
    Pojawia się w:
    Polimery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Polymer matrix composite laminate under hygrothermal exposure
    Autorzy:
    Kormaníková, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/131582.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Komisja Inżynierii Budowlanej PAN Oddział w Katowicach
    Tematy:
    polymer matrix composites
    laminate plate
    hygrothermal model
    mechanical characteristics
    thermal strength of ratio
    moisture strength of ratio
    internal forces
    kompozyty z osnową polimerową
    płyta laminowana
    model higrotermiczny
    właściwości mechaniczne
    wytrzymałość cieplna
    wilgotność
    siły wewnętrzne
    Opis:
    The static load model of laminate with the hygrothermal load is considered in the paper. The corresponding ply properties are calculated using Mori-Tanaka method. A parametric study is conducted by varying the fiber volume fraction in one laminate layer and the fiber orientation of the angle plies in the laminate. The internal forces of laminate plate with symmetric and unsymmetric stacking of layers are investigated.
    Źródło:
    Roczniki Inżynierii Budowlanej; 2016, 16; 49-54
    1505-8425
    Pojawia się w:
    Roczniki Inżynierii Budowlanej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of Strenght Properties of Carbon Fibre-Reinforced Composites
    Autorzy:
    Bondyra, Agnieszka
    Łusiak, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/36811015.pdf
    Data publikacji:
    2023
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
    Tematy:
    polymer composites
    fibre composites
    static tensile testing
    carbon fibres
    fibre-matrix interface
    Opis:
    Tensile tests were carried out on three series of composite samples according to the ASTM (American Society for Testing and Materials). The materials tested were characterised by using the same manufacturing method. The specimens were hand-laminated using MGS L285/H285 epoxy resin. The feature that differentiates the structure of each laminate series is the type of reinforcement. A biaxial fabric IMS65 CTLX with a 0/90 arrangement was used to reinforce the C-series composite specimens; for the D-series, a symmetrical fabric Interglass 02037 with a 0/90 weave was used, and for the e-series specimens, a modular fabric IMS65 with a 45 weave was used. The share of composites in the manufacture of construction products is steadily increasing. This is due to the development of new technologies for manufacturing composite elements and composites, with properties that are more and more in line with the requirements of the industry resulting from technological progress. Composite products have to meet many performance requirements. Tensile testing is used to determine some of the key mechanical properties of laminates. Fibre-reinforced polymer (FRP) composites have been used in various engineering structures for many decades. Their unique physical and mechanical properties make them a well-known, most produced and most widely used type of composite materials. In the case of fibre composites, it is the fibres that take over the basic stresses and are responsible for achieving the appropriate stiffness and strength, while the matrix ensures optimum use of the properties of the fibres and gives shape to the manufactured element. The mechanical properties of the composite and its failure process are fundamentally dependent on the high strength of the fibres, the stiffness of the matrix and the strength of the fibre-matrix interface.
    Źródło:
    Transactions on Aerospace Research; 2023, 1 (270); 45-66
    0509-6669
    2545-2835
    Pojawia się w:
    Transactions on Aerospace Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Carbon fiber polymer composites
    Autorzy:
    Markovičová, Lenka
    Zatkalíková, Viera
    Hanusová, Patrícia
    Powiązania:
    https://bibliotekanauki.pl/articles/104047.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    carbon fibers
    polymer matrix
    composites
    mechanical properties
    włókna węglowe
    matryca polimerowa
    kompozyty
    właściwości mechaniczne
    Opis:
    Carbon fiber reinforced composite materials offer greater rigidity and strength than any other composites, but are much more expensive than e.g. glass fiber reinforced composite materials. Continuous fibers in polyester give the best properties. The fibers carry mechanical loads, the matrix transfers the loads to the fibers, is ductile and tough, protect the fibers from handling and environmental damage. The working temperature and the processing conditions of the composite depend on the matrix material. Polyesters are the most commonly used matrices because they offer good properties at relatively low cost. The strength of the composite increases along with the fiber-matrix ratio and the fiber orientation parallel to the load direction. The longer the fibers, the more effective the load transfer is. Increasing the thickness of the laminate leads to a reduction in the strength of the composite and the modulus of strength, since the likelihood of the presence of defects increases. The aim of this research is to analyze the change in the mechanical properties of the polymer composite. The polymer composite consists of carbon fibers and epoxy resin. The change in compressive strength in the longitudinal and transverse directions of the fiber orientation was evaluated. At the same time, the influence of the wet environment on the change of mechanical properties of the composite was evaluated.
    Źródło:
    Quality Production Improvement - QPI; 2019, 1, 1; 276-280
    2657-8603
    Pojawia się w:
    Quality Production Improvement - QPI
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of filler content on the viscosity of polymer composites
    Autorzy:
    Markovičová, Lenka
    Zatkalíková, Viera
    Kojnoková, Tatiana
    Powiązania:
    https://bibliotekanauki.pl/articles/34670835.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    ferrite filler
    polymer matrix
    composites
    polyethylene
    rheology
    wypełniacz ferrytowy
    matryca polimerowa
    kompozyty
    polietylen
    reologia
    Opis:
    Currently, research on materials containing magnetic magnetic particles give opportunity to the prepare and study of composites with interesting magnetic features. One possibility for producing such materials is the use of fillers with magnetic properties. The final properties of such composites depend mainly on characteristic polymer matrix. However, the addition of magnetic materials arose use of new technologies. Such builders include the magnetic ferrites. Metal hexaferrites represent well researched group of magnetic materials (Mallick, 1993). Their high values of magnetocrystalline anisotropy and saturation magnetization enable widespread application of these materials as permanent magnets. Low price and excellent chemical stability with suitable magnetic characteristics classified ferrites to one of the most important magnetic materials (Rigbi, 1988). The experimental material used was a composite formed by combining a polymer matrix (linear polyethylene HDPE), and the hard-magnetic strontium ferrite labeled FD 160S as a filler. Composites with different filler contents were prepared from the starting materials. The dependence of viscosity on the content of ferrite filler was determined by rheological measurements.
    Źródło:
    Quality Production Improvement - QPI; 2021, 3, 1; 293-298
    2657-8603
    Pojawia się w:
    Quality Production Improvement - QPI
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Metallic Additives to Polymer Matrix on Properties of Composite Adhesives Dedicated for Light Metal Joining
    Autorzy:
    Mamala, A.
    Kwaśniewski, P.
    Nowak, A.
    Grzebinoga, J.
    Ściężor, W.
    Kowal, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/353945.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    polymer-metal composites
    thermal conductivity
    epoxy matrix adhesives
    reinforcement with particles of non-ferrous metals
    Opis:
    The most recent and promising trends in development of renewable sources of energy are Combined Heat and Power (CHP) systems. The newest solutions from this field are hybrid compact solar panels. The correct operation of both systems, i.e. the photovoltaic panel and the heat exchanger requires an effective connection between the two. The adhesives utilized to interconnect above elements should provide a stable and hermetic joint able to withstand mechanical and thermal impacts of the surrounding environment factors. The paper presents the research results over the impact of the type and the amount of reinforcing phase on the physical and mechanical properties of epoxy resin matrix composites reinforced with particles of non-ferrous metals (Ag, Cu, W, Al), dedicated as adhesives for connections between photovoltaic panels and heat exchangers. Based on the experimental findings the usefulness of classical analytic models for valuation of polymer-metal composites properties was validated.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 4; 2287-2294
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-12 z 12

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