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    Wyświetlanie 1-4 z 4
    Tytuł:
    Numerical and Experimental Studies of Material Properties of Special - Purpose Material Twaron T750
    Numeryczne i eksperymentalne badania właściwości materiału specjalnego przeznaczenia Twaron 750
    Autorzy:
    Barnat, W.
    Sokołowski, D.
    Gieleta, R.
    Bogusz, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/232404.pdf
    Data publikacji:
    2015
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    dry aramid fabric
    mechanical properties
    finite element analysis
    sucha tkanina aramidowa
    właściwości mechaniczne
    analiza elementów skończonych
    Opis:
    The subject of this paper is an attempt to define the fundamental constants of materials for special-purpose material - aramid dry faricTwaronT750. During research on this problem, tensile tests of dry fabric TwaronT750 were made on an Istron 8802 strength testing machine. The test was filmed with a Phantom V12 high-speed camera. A numerical model of the fabric architecture was made using commercial HyperMesh and LS-DYNA software. In the numerical model a whole research area was represented.
    Tematem tego artykułu jest próba określenia podstawowych stałych materiałowych dla materiału specjalnego przeznaczenia, którym jest tkania aramidowa Twaron 750. W trakcie prowadzonych badań zostały wykonane próby rozciągania nieprzesyconej tkaniny Twaron 750 na maszynie wytrzymałościowej Instron 8802. Próba została sfilmowana przy użyciu szybkiej kamery PHANTOM V12. Model numeryczny oddający architekturę tkaniny został wykonany przy użyciu komercyjnego oprogramowania LS-DYNA. W modelu została odwzorowana cała przestrzeń badawcza rozciąganej próbki.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2015, 4 (112); 33-38
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Crushing behaviour of the PVC foam loaded with beaters of various shapes
    Autorzy:
    Bogusz, P.
    Gieleta, R.
    Stankiewicz, M.
    Konarzewski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/387664.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    polymer foam
    polyvinyl chloride foam
    hitting with a blunt object
    energy absorption
    impact tests
    experimental mechanics
    Opis:
    Statistically, at least 50% of all injuries experienced by police officers in the line of duty are due to assaults with blunt objects. Therefore, vests used by the police should provide not only good ballistic resistance, but also good protection against such threats. Foamed materials are possible to be used for body protectors or inserts of protective clothes. The effects of dynamic impact with beaters of different shapes onto behaviour of polymeric foamed material were determined. There were used four types of beaters: flat, cylindrical, edgy and cornered. Strikes with blunt objects such as a flat board, baseball bat, edgy brick, pavement brick or a sharp stone, to which a protective ware can be subjected, were simulated. The impact load was applied to the rectangular specimens, made of polyvinyl chloride foam, with a usage of a drop hammer. Plots of force versus compression for all the tested samples were obtained and analysed. The effects of impacts with beaters of different shapes onto foamed material samples were presented. A shape of the blunt object significantly influences crushing behaviour of the foamed material. The impact energy of a flat beater is absorbed effectively on a short distance, since it is spread on a relatively large surface. The cylindrical and edgy beaters did not cause fragmentation of the samples, however, on the upper surfaces of the samples, permanent deformations mapping the beaters shapes as well as some cracks occurred. An impact with a sharp object, for example, a cornered beater is very difficult to be neutralized by the foam material, because it is cumulated on a small area.
    Źródło:
    Acta Mechanica et Automatica; 2018, 12, 1; 23-30
    1898-4088
    2300-5319
    Pojawia się w:
    Acta Mechanica et Automatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental evaluation of energy absorbing properties of selected elastomer materials
    Autorzy:
    Stankiewicz, M.
    Popławski, A.
    Bogusz, P.
    Gieleta, R.
    Sławiński, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/247562.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    material research
    experiment
    elastomers
    polyurethanes
    energy absorption properties
    Opis:
    The paper presents identifying studies of mechanical properties of the selected materials from the group of elastomers including Asmathane (65 ShA), Easyprene FPS (30 ShA), Biresin (U1305). The tests were carried out at the Laboratory of Strength of Materials, the Department of Mechanics and Applied Computer Science, with the use of an especially designed stand for testing the energy absorption of materials. The research aims were to determine the basic properties and characteristics of the selected materials as well as to compare them and identify the material with the best energy-absorbing characteristics. For a single load-unload cycle, applied dynamically, the hysteresis loops were recorded. Energy-absorption of individual materials and maximum strength were determined. During the experimental test, a fast speed camera was used for accurately register the progress performance of the test. The pictures of the dynamic tests of materials behaviour are shown. The curves of the tested materials are compared in the graphs. The resulting data will help to create constitutive models of the tested materials, which in the next stages of the project will be used in numerical studies on the impact of detonation on the designed protective panel.
    Źródło:
    Journal of KONES; 2015, 22, 3; 241-248
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental validation of the numerical model of a car impact on a road barrier
    Autorzy:
    Barnat, W.
    Bogusz, P.
    Dziewulski, P.
    Gieleta, R.
    Kiczko, A.
    Klasztorny, A.
    Klasztorny, M.
    Niezgoda, T.
    Ochelski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/245936.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    car - road barrier system
    crash test
    experimental examinations
    numerical simulations
    numerical model validation
    Opis:
    This analysis considers the problem related to the transport safety improvement by applying specialized energy absorbing elements. The advanced finite element method was used to solve this problem. The obtained results permit to estimate the practical usability of the proposed solution. In previous works of the examination team [1-5] a series of numerical analysis of the car -- road barrier dynamical system, directed to the elaboration of the numerical model methodology of an impact problem with the use of chosen CAE programs, was submitted. In this article experimental results of a Suzuki Swift car impact into a standard road barrier arę presented. Tests were carried out at the Automotive Industry Institute (PIMOT) in Warsaw, with the use of a test sample of the road barrier. Presented results of experimental tests serve to validation of a numerical model of the aforementioned system. For the safety sake the car's speed during the experimental examinations was limited to 50 km/h. Moreover, the vehicle hit perpendicularly a properly modified road barrier's sector. Experimental initial boundary and constructional conditions were modelled in numerical examinations. in which a commonlv available Suzuki Swift car model, http://www.ncac.gwu.edu, was used. Numerical analysis was carried out with the use of LS-DYNA system.
    Źródło:
    Journal of KONES; 2010, 17, 1; 17-27
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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