Temat: elastomers - Katalog OPAC zbiorów

Skocz do pozycji: 1.

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

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Skocz do pozycji: 2.

Tytuł:: Polymers foam structure numerical identification
Autorzy:: Rumianek, P.
Żach, P
Powiązania:: https://bibliotekanauki.pl/articles/248077.pdf
Data publikacji:: 2014
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: elastomers
polymers foam
oscillation
very large reversible deformation
Opis:: Polymers found regard among engineers and researcher their special proprieties. Now, we find using the polymers at present in the most advanced technically the branches of industry. In construction of machines, more and more often are practical used hyperdeform materials. The group of construction materials, called hyperdeformable, includes among others: elastomers, plastics made based on rubber, thermoplastic structures, such as polycarbonate, gels and sols, composites and foams: open and closed pores. Porous structures are produced on the basis of different materials, synthetic thermoplastic polymers and thermosetting. The problem of porous materials is taken in many research centres in the world. Porous materials (also called cellular plastics, foam plastics or foamed plastics) include gas phase dispersed in a solid phase of polymeric material. Properties of such systems depend on the properties of the polymer warp and cell structure comprising the gas phase. Approach previously used to anticipate and interpret the behaviour of the hyperdeformable structures, using the theory of hyperelastic materials, does not resolve the issue because it only describes the elastic properties. The article presents an original methodology developed structural identification the viscoelastic properties of hyperdeformable materials, and in particular modern construction materials from the group of plastics and composites of elastomers, foams, etc
Źródło:: Journal of KONES; 2014, 21, 3; 259-263
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Oscillation systems from hyper-deforms elements
Autorzy:: Żach, P.
Powiązania:: https://bibliotekanauki.pl/articles/241526.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: elastomers
incompressible materials
oscillation
very large reversible deformation
Opis:: In construction of machines more and more often are used materials called hyper-elastic, for example: foam structures, materials based on natural and synthetic rubbers and other materials subjecting large deformations. The porous structures are produced on the basis of different synthetic materials, thermoplastic polymers and thermosetting. Subject of porous materials is studied by many scientists around the world. Porous materials (also called cellular plastics, foam plastics or foamed plastics) include gas phase dispersed in a solid phase of polymeric material. Properties of such systems depends on the properties of the polymer warp and cell structure, comprising the gas phase. Approach previously used to anticipate and interpreting the behaviour of the hyper-deformable structures, which use the theory of hyperelastic materials, does not resolve the issue because it only describes the elastic properties. The article presents an original methodology developed structural identification the viscoelastic properties of hyperdeformable materials, and in particular modern construction materials from the group of plastics and composites of elastomers, foams, etc. The aim of the article was an oscillation analysis in systems from elements of incompressible and the description of phenomena setting in during of work of suchlike systems.
Źródło:: Journal of KONES; 2015, 22, 4; 335-341
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Hyperelastic polynomial models in plastics behaviour analyses
Autorzy:: Żach, P
Powiązania:: https://bibliotekanauki.pl/articles/246289.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: incompressible materials
elastomers
oscillation
very large reversible deformations
vibration
Opis:: The issue of vibration damping occurs in many mechanical problems in the operation of various devices, in the automotive industry engineering, aerospace. In the case where damping by selection of the masses and dimensions is not possible due to various reasons or for other reasons it was abandoned, vibration dampers are used. Minimization of adverse impact of dynamic interaction effects is an important research and technical problem. Passive energy absorbers used today (complex of bumpers, passenger lifts buffers typically allows to the safe dissipation of energy within a certain range of loads. In the case of high-impact loading variability is desirable to use an adaptive energy absorption system capable of rapid change their dynamic characteristics. The main issue in the analysis of interactions impact of dynamic loads on objects is dispersion (dissipation) of kinetic energy during impact. In constructions of polymer composite structures the sources of energy dissipation are: matrix of polystructural viscoelasticity, morphology of material, defect of structure, thermoplastic and viscoplastic dumping. In construction of machines more and more often be practical used materials name hyper-elastic. To description of elastic proprieties it’s possible to use the worked out theories well in which the most important they are the multinomial models and them special coincidence: Mooney’s – Rivlin’s, Yeoh’s. In this paper, is presented numerical behaviour analyses materials with large deformation.
Źródło:: Journal of KONES; 2013, 20, 1; 381-386
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: The hyperdeform materials in systems of vibrations machines
Autorzy:: Żach, P.
Powiązania:: https://bibliotekanauki.pl/articles/246701.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: incompressible materials
elastomers
oscillation
very large reversible deformations
vibration
Opis:: In construction of machines more and more often be practical used materials name hyper-elastic for example: foamy structures, materials of base natural and synthetic rubbers and another of large reversible deformations. To description of elastic proprieties, it is possible to use the worked out theories well in which the most important they are the multinomial models and them special coincidence: Mooney-Rivlin, Yeoh and Ogden. Precise description propriety in questions dissipation the energy, dumping of vibration is a fault currently. The aim of the article is the analysis oscillation in systems from elements of incompressible and the description of phenomena setting during of work of such like systems. In this paper, is presented built methodology of elasticity propriety materials with large deformation. An assumption is a dissipation function we have present in analogous figure to elasticity function, well known with theory of hyperelastic materials. A description of model of internal damping was proposed with the proof the influence of component part of polynomial: figure and volumetric. The numeric permissive on comparison of received conception of description of hyperelastic material worked out in support about theoretical foundations with results of experimental investigations analyses' be become executed.
Źródło:: Journal of KONES; 2012, 19, 2; 587-590
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: The innovations in description of propriety of structures the hyper-elastic materials
Autorzy:: Żach, P.
Powiązania:: https://bibliotekanauki.pl/articles/247644.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: plastics
hyperelastic materials
numerical simulation
identification of propriety elastomers materials
Opis:: The hyper-elastic materials e.g.: the elastomers, frothed structures PUR about open and closed pores, the materials using the matrix of natural rubber materials whether as well as synthetic the gels be practical used in different engineer applications from over 30 year s. They really several summers and intensive works on field of materiał engineering made possible extension the spectres of uses as well as the utilization of elastomers compositions. In this paper, will be presented built methodology of elasticity propriety materials with large deformation. In article be become presented method of identification and description of hyper-elastic materials from special return on numeric models the attention. Quantitative analysis be becomes executed in support about executed experimental investigations. The numeric permissive on comparison of received conception of description of hyper-elastic material worked out in support about theoretical foundations with results of experimental investigations analyses be become executed.
Źródło:: Journal of KONES; 2010, 17, 3; 533-538
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Influence of hardness on mechanical properties of elastomers
Autorzy:: Ochelski, S.
Bogusz, P.
Kiczko, A.
Powiązania:: https://bibliotekanauki.pl/articles/246003.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: experimental research
elastomers
mechanical properties
relative damping coefficient
mechanical loss angle
Opis:: In this paper, elastomers with different hardness factors were examined to evaluate the influence of the hardness on their mechanical properties. The following hardness numbers, measured in Shore A hardness scale, were investigated: 40; 60; 70 and 90°. Basic mechanical tests i.e. axial tension and axial compression have been performed in order to calculate elastic properties and stress values corresponding to the fixed strains: epsilon = 0.2; 0.3 and 0.5. The sigma (epsilon) dependences from the tension and compression tests are nonlinear and have different shapes. The tension plot can be described by a convex parabola, while the compression curve can be approximated by a concave one. dynamic load tests with loading freąuencies 0.01; 0.1; 1.0 and 3,OHz were performed in order to determine the hysteresis loop and to obtain force and displacement dependences in time. From those results the following factors were calculated: relative damping coefficient and mechanical loss angle, as well as their dependence on load frequencies. The influence of hardness on both in-phase and out-of-phase components of normal modulus were investigated. The sensitivity of the examined elastomers to the loading rate was also investigated.
Źródło:: Journal of KONES; 2010, 17, 1; 317-325
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: The modelling of buckling fenders to protect the ship berthing process
Autorzy:: Galor, W.
Powiązania:: https://bibliotekanauki.pl/articles/243425.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: safety of navigation
berthing of ship
impact energy
buckling fenders
polyurethane elastomers
Opis:: The berthing of ship to the quay is the last stage of navigation process in marine shipping. During the ships berthing the impact in berth can occur and in result the appearing of energy in ship - fender device - berth system. The exceeding of admissible value of this energy leads to damage of one of these elements and in effect causes the accident. The accident can happen as unwanted event connected with negative consequences (damage of ship and port structure). It can be connected with ship's strike in quay. The fenders are devices to protect the port structures and ships bulk while berthing to the quay. Design and choice of fender system should contain selection suitable devices answering of existing or planning construction of structure, which select system should be protected. The buckling type of fenders (arch, conical shape) are the newest generation combining excellent absorbing energy with reaction forces of ship berthing. The paper presents the study of fenders designing based on analytical, experimental and numerical considerations. The paper presents an example of fenders designing. The buckling type of fenders achieved by carrying out of laboratory research was made. The Portowców Quay in Port of Świnoujście real research of ships berthing was carried out.
Źródło:: Journal of KONES; 2007, 14, 3; 169-175
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Investigation of plates covered with elastomeric coatings subjected to shock wave loading
Badanie płyt pokrytych warstwą elastomeru obciążonych falą uderzeniową
Autorzy:: Boczkowska, A.
Barnat, W.
Niezgoda, T.
Powiązania:: https://bibliotekanauki.pl/articles/241725.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: ochrona przed skutkami wybuchów
elastomery
nowe technologie
protection against blast damage
elastomers
new technologies
Opis:: The subject of investigation was numerical and experimental analysis of energy absorbing elastomeric layers in connection with experimental verification. The energy-absorbed layers were subjected to pressure impulse simulating a blast. The elaborated structures will be applied to solve problems connected with increasing the security of military vehicles and crucial oil and gas pipeline structures, particularly in dangerous locations, such as crossings over rivers etc. The constructions exposed to a violent crash or to the effect of a shock wave should have a structure enabling the absorption of a part of the crash-energy. Energy absorbing elements are most commonly made in a form of sandwich shells, the core of which is a system of suitable structural sections. Nevertheless, the application of elastomers may be of interest, because these materials possess the capabilities of absorbing the energy of a shock wave produced by a blast, and thus allow for a good protection. The analysis carried out will be useful for selection of kinds and parameters of energy-absorbing coatings, as well as for the future investigation aimed at determining the optimal parameters of energy-absorbing structures used in the armoured vehicles construction. In the paper, some aspects of an approach to the problems of energy absorption capabilities and crash energy dissipation were presented.
Przedmiotem badań była numeryczno-doświadczalna analiza energochłonnych elastomerowych warstw połączona z weryfikacją eksperymentalną. Warstwy energochłonne zostały obciążone impulsem ciśnienia symulującym wybuch. Opracowane struktury elastomerowe będą wykorzystywane do rozwiązywania problemów związanych ze zwiększenia bezpieczeństwa pojazdów wojskowych oraz newralgicznych konstrukcji rurociągów i gazociągów szczególnie w niebezpiecznych miejscach, takich jak przejścia nad rzekami itp. Konstrukcje, które mogą ulec szybkim zderzeniom lub narażone są na działanie fali uderzeniowej, powinny mieć strukturę umożliwiającą pochłaniającą część energii udaru. Elementy energochłonne najczęściej są budowane w postaci powłok przekładkowych, których rdzeniem jest układ odpowiednich kształtowników. Niemniej jednak interesujące jest zastosowanie elastomerów. Tworzywa te mające zdolności do pochłaniania energii fali uderzeniowej pochodzącej od wybuchu pozwalają na dobrą ochronę. Dokonana analiza będzie przydatna przy doborze rodzajów i parametrów warstw energochłonnych, posłuży też do dalszych badań, których zadaniem będzie określenie optymalnych parametrów struktur energochłonnych wykorzystywanych w budowie pojazdów opancerzonych. W poniższym artykule przedstawiono wycinek podejścia do problemu energochłonności oraz rozpraszania energii udaru.
Źródło:: Journal of KONES; 2007, 14, 1; 39-47
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Interaction testing of rapeseed methyl esters and their blends with diesel fuel on elastomers
Badania wzajemnego oddziaływania estrów metylowych oleju rzepakowego i ich mieszanin z olejem napędowym z elastomerami
Autorzy:: Baczewski, K.
Powiązania:: https://bibliotekanauki.pl/articles/243167.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: silniki spalinowe estry metylowe oleju rzepakowego (RME)
olej napędowy
elastomery
combustion engines
rapeseed methyl esters (RME)
diesel fuel
elastomers
Opis:: Several elastomers used as seals not compatibility with fatty acid methyl esters (FAME). The paper presents the results of laboratory investigations of five various elastomers (polyethylene rubber, fluorine rubber, butadiene-acrylonitryle rubber, epichlorodidrine rubber and commercial gasoline-resistant rubber) interaction of rapeseed methyl esters (RME) and their blends with diesel fuel. The test results showed that the elastomers made ofpolyethylene rubber and fluorine rubber are compatible with rapeseed methyl esters. The butadiene-acrylonitryle rubber, epichlorodidrine rubber and commercial gasoline-resistant rubber elastomers exhibited changes in physical properties: swelling in crease and hardness reduce in comparison with diesel fuel. Aged rapeseed methyl esters are more active to elastomers in comparison with fresh rapeseed methyl esters. The blends of rapeseed methyl esters with diesel fuel cause high changes of those elastomers volume, mass and hardness, already for blends contain 5% (by volume) of rapeseed methyl esters in comparison to diesel fuel.
Wiele elastomerów stosowanych na uszczelnienia jest mało odpornych na działanie estrów metylowych kwasów tłuszczowych (FAME). W referacie przedstawiono wyniki badań laboratoryjnych wzajemnego oddziaływania pięciu różnych elastomerów (z polietylenu, z kauczuku fluorowego, z kauczuku butadienowo-akrylonitrylowego, z kauczuku epichlorohydrynowego i handlowej gumy benzynoodpornej) z estrami metylowymi oleju rzepakowego (RME) i ich mieszaninami z olejem napędowym. Stwierdzono, że próbki elastomerów polietylenowych i z kauczuku fluorowego są odporne na działanie estrów metylowych oleju rzepakowego. Estry metylowe oleju rzepakowego powodują wzrost pęcznienia i spadek twardości elastomerów z kauczuku butadienowo-akrylonitrylowego, z kauczuku epichlorohydrynowego i z handlowej gumy benzynoodpornej. W porównaniu z olejem napędowym zestarzone estry metylowe oleju rzepakowego są bardziej aktywne w stosunku do elastomerów niż świeże estry metylowe oleju rzepakowego. Także mieszaniny estrów metylowych oleju rzepakowego z olejem napędowym powodują duże zmiany objętości, masy i twardości tych elastomerów, już przy zawartości 5% (objętościowo) estrów metylowych oleju rzepakowego w mieszaninie z olejem napędowym w porównaniu z olejem napędowym.
Źródło:: Journal of KONES; 2007, 14, 2; 19-25
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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