Thematische Bibliographien / Elastomere

Inhaltsverzeichnis

  1. Zeitschriftenartikel
  2. Dissertationen
  3. Bücher
  4. Buchteile
  5. Konferenzberichte
  6. Berichte der Organisationen

Auswahl der wissenschaftlichen Literatur zum Thema „Elastomere“

Autor: Grafiati
Veröffentlicht am 4. Juni 2021
Zuletzt aktualisiert am 25. Mai 2024

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Zeitschriftenartikel zum Thema "Elastomere"

1

Kaal, William, und Sebastian Rieß. „Elastomere Sensorwerkstoffe zur Digitalisierung industrieller Prozesse“. Konstruktion 71, Nr. 05 (2019): IW4—IW6. http://dx.doi.org/10.37544/0720-5953-2019-05-70.

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Die Digitalisierung industrieller Prozesse erfordert eine möglichst hohe Integrationsdichte von Sensoren in mechanische Teilkomponenten von industriellen Anlagen. Am Fraunhofer LBF konnte die Nutzbarkeit dielektrische Elastomere in Verbindung mit speziell entwickelten strukturierten Elektroden für dynamische Kraftmessungen nachgewiesen und deren Integration in einen Flachsensor sowie in ein elastisches Elastomer-Maschinenlager gezeigt werden.
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Baaser, Herbert. „Simulationsmodelle für Elastomere“. ATZ - Automobiltechnische Zeitschrift 112, Nr. 5 (Mai 2010): 364–69. http://dx.doi.org/10.1007/bf03222170.

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3

Hetterich, Martina, und Dirk Butschkau. „Flammwidrige thermoplastische Elastomere“. adhäsion KLEBEN & DICHTEN 63, Nr. 11 (November 2019): 26–29. http://dx.doi.org/10.1007/s35145-019-0072-3.

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4

Wendorff, J. H. „Piezoelektrische flüssigkristalline Elastomere“. Angewandte Chemie 103, Nr. 4 (April 1991): 416–17. http://dx.doi.org/10.1002/ange.19911030408.

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5

Agafonov, Alexander V., Anton S. Kraev, Alexander E. Baranchikov und Vladimir K. Ivanov. „Electrorheological Properties of Polydimethylsiloxane/TiO2-Based Composite Elastomers“. Polymers 12, Nr. 9 (18.09.2020): 2137. http://dx.doi.org/10.3390/polym12092137.

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Electrorheological elastomers based on polydimethylsiloxane filled with hydrated titanium dioxide with a particle size of 100–200 nm were obtained by polymerization of the elastomeric matrix, either in the presence, or in the absence, of an external electric field. The viscoelastic and dielectric properties of the obtained elastomers were compared. Analysis of the storage modulus and loss modulus of the filled elastomers made it possible to reveal the influence of the electric field on the Payne effect in electrorheological elastomers. The elastomer vulcanized in the electric field showed high values of electrorheological sensitivity, 250% for storage modulus and 1100% for loss modulus. It was shown, for the first time, that vulcanization of filled elastomers in the electric field leads to a significant decrease in the degree of crosslinking in the elastomer. This effect should be taken into account in the design of electroactive elastomeric materials.
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Herrmann, Konrad, Peter Strobel und Anton Stibler. „Neues Härtemessverfahren für sehr weiche Elastomere“. Materials Testing 44, Nr. 3 (01.03.2002): 83–86. http://dx.doi.org/10.1515/mt-2002-440308.

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7

Ikeda, Tomiki, Jun-ichi Mamiya und Yanlei Yu. „Photomechanik flüssigkristalliner Elastomere und anderer Polymere“. Angewandte Chemie 119, Nr. 4 (15.01.2007): 512–35. http://dx.doi.org/10.1002/ange.200602372.

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8

Biggs, James, Karsten Danielmeier, Julia Hitzbleck, Jens Krause, Tom Kridl, Stephan Nowak, Enrico Orselli et al. „Elektroaktive Polymere: Entwicklungen und Perspektiven dielektrischer Elastomere“. Angewandte Chemie 125, Nr. 36 (22.07.2013): 9581–95. http://dx.doi.org/10.1002/ange.201301918.

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Yu, Yanlei, und Tomiki Ikeda. „Weiche Aktuatoren auf der Basis flüssigkristalliner Elastomere“. Angewandte Chemie 118, Nr. 33 (18.08.2006): 5542–44. http://dx.doi.org/10.1002/ange.200601760.

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10

Fritz, Hans-Gerhard. „Neue Thermoplastische Elastomere: Rezeptierung, Aufbereitung und Werkstoffeigenschaften“. Chemie Ingenieur Technik 67, Nr. 5 (Mai 1995): 560–69. http://dx.doi.org/10.1002/cite.330670505.

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Dissertationen zum Thema "Elastomere"

1

Papke, Nicolai [Verfasser], und Josef [Akademischer Betreuer] Karger-Kocsis. „Neue thermoplastische Elastomere mit co-kontinuierlicher Phasenstruktur auf Basis von Polyester/Elastomer Blends unter Verwendung gezielt chemischer funktionalisierter Elastomere / Nicolai Papke ; Betreuer: Josef Karger-Kocsis“. Kaiserslautern : Technische Universität Kaiserslautern, 2019. http://d-nb.info/1197055347/34.

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2

Komp, Ansgar Michael. „Smektische Elastomere mit perfluorierten Mesogenen“. [S.l. : s.n.], 2006.

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3

Tscheschel, André. „Räumliche Statistik zur Charakterisierung gefüllter Elastomere“. [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=974004901.

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Heger, Matthias. „Entwicklung eines Stereolithographieharzes für elastomere Produkte“. [S.l. : s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=962747858.

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Tscheschel, André. „Räumliche Statistik zur Charakterisierung gefüllter Elastomere“. Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola&quot, 2009. http://nbn-resolving.de/urn:nbn:de:swb:105-887670.

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Im Mittelpunkt der Dissertation stehen räumlich-statistische Verfahren zur Charakterisierung der Verteilung von Füllstoffen (Ruß oder Silica) innerhalb der Polymermatrix von gefüllten Elastomeren. Das Variogramm und andere Zufallsfeldcharakteristiken werden dazu benutzt, um die in TEM-Aufnahmen von Dünnschnitten gefüllter Elastomere sichtbar werdende Füllstoffverteilung statistisch zu beschreiben. Mit Hilfe von Shot-Noise-Prozessen wird eine Verbindung zwischen der räumlichen Verteilung der kugelförmigen Füllstoffprimärpartikel und den TEM-Aufnahmen hergestellt. Mit einer stochastischen Optimierungsmethode kann das System der auf die Bildebene projizierten Primärpartikel auch aus TEM-Aufnahmen rekonstruiert werden, was zu einer robusten Charakterisierung der Füllstoffdispersion führt. Weitere wichtige Punkte der Arbeit stellen die statistische Charakterisierung einzelner Füllstoff-Aggregate sowie die Untersuchung der spezifischen Euler-Zahl des polymeren Netzwerkes dar.
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Peters, Martin. „Laserstrahlschweissen thermoplastischer Elastomere unter fluider Umgebung /“. Aachen : Mainz, 2006. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=016148526&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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MORRIS, ALUN. „Aspects de l'adhesion elastomere/metal poreux“. Paris, ENMP, 1996. http://www.theses.fr/1996ENMP0619.

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L'objectif de cette etude est la caracterisation des aspects de l'adhesion de polymeres sur substrats poreux. Apres l'impregnation d'un metal poreux par un elastomere polyurethanne nous eviterons la rupture catastrophique de l'interface. L'infiltration du polymere dans le reseau poreux augmente l'ancrage mecanique a l'interface et par consequent ameliore l'adherence du polymere sur du metal par rapport a un systeme dependant uniquement des interactions et/ou liaisons interfaciales. Nous avons determine l'influence de plusieurs parametres sur l'infiltration du polymere dans les substrats poreux temps, pression, pourcentage de porosite, metal (acier inoxydable, alliage de titane ti-6al-4v, alliage de cobalt-chrome-molybdene). Nous avons etabli une mesure de base de l'adhesion sur les metaux denses en fonction du metal et de l'etat de surface (polie, sablee, primaire. . . ). Ensuite nous avons montre l'influence du pourcentage de porosite et des caracteristiques des pores sur la resistance de l'interface polymere-metal poreux. Nous voyons experimentalement que l'augmentation de l'energie apparente d'adhesion obtenue avec les substrats poreux est due a l'ancrage des fibrilles du polymere dans les pores. Dans la modelisation du comportement de l'interface en torsion nous considerons qu'elle reste intacte jusqu'a une valeur de deformation de cisaillement critique, g#c. Au dela nous avons la rupture de l'interface plane suivi de la formation de fibrilles a partir du polymere ancre dans les interstices. La deformation de cisaillement critique, g#c, est consideree comme valeur intrinseque correspondant a l'adhesion du systeme polymere-metal. La variation du comportement et des changements structuraux macromoleculaires des polyurethannes due au vieillissement hygrothermique est aussi abordee
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Paul, Steffen. „Spritzgußsimulation als Kopplungselement von CAD und CAE“. Universitätsbibliothek Chemnitz, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-142037.

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Weiss, Felix. „Lyotrop flüssigkristalline Epoxid-Amin-Additionspolymere und Elastomere“. [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=970132581.

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Kremer, Kai Karsten. „Qualitätskontrolle mit mobiler NMR : Elastomere und Kunststoffe /“. Aachen : Shaker, 2006. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=014911600&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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Bücher zum Thema "Elastomere"

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Besdo, Dieter, Bodo Heimann, Manfred Klüppel, Matthias Kröger, Peter Wriggers und Udo Nackenhorst, Hrsg. Elastomere Friction. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-10657-6.

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Besdo, Dieter. Elastomere Friction: Theory, Experiment and Simulation. Berlin, Heidelberg: Springer-Verlag Berlin Heidelberg, 2010.

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3

International Seminar on Elastomers (1988 University of Akron). International Seminar on Elastomers: Papers presented at the International Seminar on Elastomers, held at the Gardner Center of the University of Akron, 26-28 October 1988. Herausgegeben von White James Lindsay 1938- und Murakami Kenkichi 1926-. New York, NY: Wiley, 1989.

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4

Joseph, Mongiello, und Business Communications Co, Hrsg. Thermoplastic elastomers: New expectations. Stamford, Conn., U.S.A: Business Communications Co., 1985.

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1934-, Mark James E., und Erman Burak, Hrsg. Science and technology of rubber. 3. Aufl. Amsterdam: Elsevier Academic Press, 2005.

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Limited, Rapra Technology, Hrsg. New opportunities for thermoplastic elastomers: A one-day seminar. Shawbury: RAPRA Technology, 1996.

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Mongiello, Joseph. Thermoplastic elastomers. Norwalk, CT (25 Van Zant Street, Norwalk 06855): Business Communications Co., 1989.

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Elastomer molding technology: A comprehensive and unified approach to materials, methods, and mold design for elastomers. Hudson, OH: Elastech, 2003.

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Pruett, Kenneth M. Chemical resistance guide for elastomers: A guide to chemical resistance of rubber and elastomeric compounds. La Mesa, Calif: Compass Publications, 1988.

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Hepburn, C. Polyurethane Elastomers. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2924-4.

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Buchteile zum Thema "Elastomere"

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Rinnbauer, Meike, Günter Stein, Volker Peterseim und Meike Rinnbauer. „Elastomere“. In Kunststoffe, 1203–68. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-16173-5_3.

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2

Laska, Reinhold, und Christian Felsch. „Elastomere“. In Werkstoffkunde für Ingenieure, 307–10. Wiesbaden: Vieweg+Teubner Verlag, 1992. http://dx.doi.org/10.1007/978-3-663-07833-3_10.

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Koltzenburg, Sebastian, Michael Maskos und Oskar Nuyken. „Elastomere“. In Polymere: Synthese, Eigenschaften und Anwendungen, 497–510. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-34773-3_18.

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Kaiser, Wolfgang. „Elastomere“. In Kunststoffchemie für Ingenieure, 503–22. München: Carl Hanser Verlag GmbH & Co. KG, 2015. http://dx.doi.org/10.3139/9783446447745.013.

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Kaiser, Wolfgang. „Elastomere“. In Kunststoffchemie für Ingenieure, 511–30. 5. Aufl. München: Carl Hanser Verlag GmbH & Co. KG, 2021. http://dx.doi.org/10.3139/9783446466029.013.

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Baur, Erwin, Guenther Harsch und Martin Moneke. „Elastomere“. In Werkstoff-Führer Kunststoffe, 229–46. München: Carl Hanser Verlag GmbH & Co. KG, 2019. http://dx.doi.org/10.3139/9783446460676.014.

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Kaiser, Wolfgang. „Elastomere“. In Kunststoffchemie für Ingenieure, 511–30. München, Germany: Carl Hanser Verlag GmbH & Co. KG, 2021. http://dx.doi.org/10.1007/978-3-446-46602-9_13.

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Baur, Erwin, Günther Harsch und Martin Moneke. „Elastomere“. In Werkstoff-Führer Kunststoffe, 229–46. München, Germany: Carl Hanser Verlag GmbH & Co. KG, 2019. http://dx.doi.org/10.1007/978-3-446-46067-6_14.

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Koltzenburg, Sebastian, Michael Maskos und Oskar Nuyken. „Elastomere“. In Polymere: Synthese, Eigenschaften und Anwendungen, 551–66. Berlin, Heidelberg: Springer Berlin Heidelberg, 2024. http://dx.doi.org/10.1007/978-3-662-64601-4_18.

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Bruder, Ulf. „Thermoplastische Elastomere“. In Kunststofftechnik leicht gemacht, 36–45. München, Germany: Carl Hanser Verlag GmbH & Co. KG, 2016. http://dx.doi.org/10.1007/978-3-446-44981-7_4.

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Konferenzberichte zum Thema "Elastomere"

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Palmskog, Goran F., und Britt-Mari Svensson. „Polyimide waveguide and laser diode encapsulated with silicone elastomere“. In OE/LASE '94, herausgegeben von Ray T. Chen und John A. Neff. SPIE, 1994. http://dx.doi.org/10.1117/12.174515.

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Kunnil, Manoj, David Yamarthi und Santhosh K. Kompally. „Finite Element Analysis of Elastomers Using ANSYS“. In 2012 20th International Conference on Nuclear Engineering and the ASME 2012 Power Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/icone20-power2012-54342.

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Elastomeric materials have a capability to withstand large deformations and still be able to fully recover their original dimensions. Natural and synthetic elastomers and their derivatives can reach strains as high as 500–1000%. Engineering materials, such as crystalline metals are classified as linear elastic solids, whereas elastomeric materials are considered as nonlinear elastic solids. Elastomers present a very complicated mechanical behavior that exceed the linear elastic theory and contain large deformations, plastic and viscoelastic properties. Finite element (FE) is a powerful tool to analyze such elastomers. Design of elastomeric systems in an industrial scenario generally requires (i) reliability and (ii) a minimum cycle time. This paper starts with a review of the hyperelastic theory, followed by a detailed discussion on the process involved in the material characterization of hyperelastic material like DuPont™ Viton® fluoroelastomer and polyacrylic elastomer in industrial application point of view. The paper also discusses guidelines to be followed in the various stages of material characterization such as testing, sampling and finite element simulation. Numerical stability issues associated with elastomeric modeling in finite element context and a set of guidelines to be followed in finite element analysis of elastomers are illustrated through a DuPont™ Viton® fluoroelastomer and polyacrylic elastomer pad vibration isolation systems. The above technique has been applied for designing vibration isolation systems for generators.
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Bastola, Anil K., Milan Paudel und Lin Li. „3D Printed Magnetorheological Elastomers“. In ASME 2017 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/smasis2017-3732.

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In this study, 3D printed magnetorheological (MR) elastomer has been characterized through a force vibration testing. The 3D printed MR elastomer is a composite consisting three different materials, magnetic particles and two different elastomers. The MR elastomers were printed layer-by-layer by encapsulating MR fluid within the polymeric elastomer and then allowed to cure at room temperature. The 3D printing allowed to print various patterns of magnetic particles within the elastomeric matrix. In the presence of an external magnetic field, both elastic and damping properties of the 3D printed MR elastomers were changed. Natural frequency, stiffness, damping ratio, damping coefficient, and shear modulus were increased with increasing magnetic field. For the single degree-of-freedoms system, shear mode MR elastomers suppressed the transmitted vibration amplitude up to 31.4% when the magnetic field was 550 mT. The results showed that the 3D printed MR elastomer could be used as a tunable spring element for vibration absorption or isolation applications. However, further optimization of the magnetic particles’ configurations should be performed to obtain the higher MR effect.
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Petrach, Elaine, Ismat Abu-Isa und Xia Wang. „Improvement of Mechanical Properties of Elastomer-Plastic Conductive Composites for Bipolar Plates in Proton Exchange Membrane Fuel Cells“. In ASME 2010 8th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2010. http://dx.doi.org/10.1115/fuelcell2010-33071.

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Bipolar plates account for about 80% of the fuel cell stack weight. The use of low density and high strength conductive composites for making bipolar plates will result in a lighter and more compact fuel cell stack assembly. Light weight composites were developed based on a two component elastomeric silicone RTV matrix. However, two shortcomings of this composite material are low mechanical strength and relatively high permeability to gases. The purpose of this paper is to develop a new composite material which will overcome high permeability and low strength issues through the use of elastomer-plastic blends as the composite matrix. The elastomer-plastic blends consist of vinyl ester with either urethane elastomer or ethylene-propylene-diene (EPDM) rubber. The chosen elastomers have higher tensile strength and lower gas permeability than silicone rubber. The elastomers will be blended with vinyl ester thermoset plastic to further enhance these characteristics. Synergistic conductive filler system developed in previous work will be used for the new composites to make them conductive. Compatibility of blends ranging in concentration from pure plastic to pure elastomeric composition will be presented along with in-plane electrical resistivity and mechanical properties.
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Fripp, Michael, Rutger Evers, Stephen Greci, Brandon Least, Christopher Pelto, Christopher Rodriguez, Taylor Stein, Lori Wiltz und Allan Zhong. „Novel Expanding Metal Alloy for Non-Elastomeric Sealing and Anchoring“. In SPE Annual Technical Conference and Exhibition. SPE, 2022. http://dx.doi.org/10.2118/210273-ms.

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Abstract A new class of expanding isolation systems has been enabled by the creation of a uniquely engineered expanding metal alloy. The engineered metal alloy expands downhole and chemically transforms from a metal alloy into a rock-like seal. This novel metal alloy results in a sealing system that combines the operational simplicity of swellable elastomers with the robustness of non-elastomeric seals and includes an anchoring capability to the seal. Swellable elastomers have provided effective zonal isolation since their introduction in the early 2000s. Swellable elastomers expand by absorbing fluids within the matrix of the elastomer. This absorption causes the swellable elastomer to expand in size and results in a high-pressure seal for zonal isolation. Despite the widespread success of swellable packers, for some applications a non-elastomeric seal for zonal isolation is preferred and more reliable. Applications benefit from non-elastomeric seals for zonal isolation due to temperature, pressure, or chemical compatibility reasons. Other applications, such as fluid injection operations, require anchoring capabilities which can be challenging with swellable elastomers. The new engineered metal alloy chemically reacts with the downhole water-based fluids and expands into a strong rock-like material that provides non-elastomeric zonal isolation with pressure and anchoring capabilities exceeding swellable technology at higher expansion ratios. In addition, water swellable elastomers are not suitable for applications which have a high salinity brine or produced water as the setting fluid. By contrast the expanding metal alloy chemical reaction is enhanced by increasing salinity. The expanding metal alloy bonds with the water-based fluid in the wellbore and this chemical reaction causes the metal to expand into a rock-like material. The chemical reaction results in a new material that is larger than the original alloy. Unlike a swellable elastomer which absorbs fluids (a purely physical process governed by thermodynamics and osmosis), the metal alloy's molecular structure chemically transforms, incorporating the water molecules to create a new material. The metal alloy can expand over 80% as it transforms into its final state as a rock-like seal. Extensive small-scale and full-scale tests were conducted to reliably and consistently map the metamorphosis from the engineered metal alloy into the rock-like material. These tests required developing new methods for testing the material including designing new test fixtures and new test procedures. Testing proved seals were created in smooth cylinders as well as in irregular shapes and with a wide range of brine types and brine concentrations. The result is an expanding engineered alloy that creates a robust and durable seal with anchoring capabilities across a wide range of downhole conditions. A novel non-elastomeric zonal isolation system is composed of a new expanding metal alloy that expands in water-based wellbore fluid, completion fluid, or formation fluid. The performance of this new material has been demonstrated through experimental testing. This paper discusses the development and initial testing of this new expanding metal and the process of forming a robust and reliable downhole seal with anchoring capabilities.
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Schaaf, Kristin L., und Sia Nemat-Nasser. „Blast Resistant Elastomeric Polymer-by-Design“. In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-64414.

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The essence of this research is to mitigate shock through material design. Here we seek to develop a thorough understanding of the material through experimental characterization methods that lend themselves to creating verifiable constitutive relations, all while working towards the development of a new blast resistant elastomeric composite material. The host elastomer, polyurea, is created by reacting Versalink P-1000 with Isonate 143L. This study evaluates the impact of both chemistry modifications and the integration of micro-scale additives on the polyurea material system properties and performance. The properties of the resultant elastomers and elastomeric composite materials are mechanically and thermally characterized using durometer testing, dynamic mechanical analysis (DMA) testing, and differential scanning calorimetry (DSC) testing in order to determine the hardness, storage and loss moduli, and glass transition temperature of the composites, respectively. Preliminary results indicate that the durometer and dynamic mechanical properties of the material can be significantly altered through such modifications. The work described here is part of an ongoing effort to develop and verify rules and tools for creating elastomer-based composite materials with optimally designed compositions and characteristics.
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Graham, Robin M., und Martine LaBerge. „Alternative Bearing Surfaces for Arthroplasty“. In ASME 1997 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/imece1997-0357.

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Abstract Elastomeric materials have been suggested for use in total joint arthroplasty as an alternative to ultra high molecular weight polyethylene (UHMWPE).1–2 As a bearing material operating under mixed lubrication regimes, UHMWPE is subject to wear. Wear particles cause an adverse tissue reaction eventually resulting in loosening of the prosthesis. The modulus of elasticity of the UHMWPE does not allow sufficient deformation of asperities which would increase the film thickness between the bearing surfaces and prevent wear. Elastomers, however, can deform under pressure and enhance lubrication by the formation of a fluid film through elastohydrodynamic and micro-elastohydrodynamic lubrication.3 However, elastomeric coatings are subject to fatigue and debonding from their rigid substrates. To promote fluid film lubrication and prevent failure associated with the use of soft elastomeric bearings, a “true cushion” bearing was designed consisting of a soft elastomer sandwiched between a thin rigid coating and a thick rigid substrate of similar chemistry. This study was aimed at characterizing the frictional behavior of this construct in a lubricated environment as compared to UHMWPE and a non-coated soft elastomeric bearing.
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8

Rodriguez, Oscar O., Arturo A. Fuentes, Constantine Tarawneh und Robert E. Jones. „Hysteresis Heating of Railroad Bearing Thermoplastic Elastomer Suspension Element“. In 2017 Joint Rail Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/jrc2017-2257.

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Thermoplastic elastomers (TPE’s) are increasingly being used in rail service in load damping applications. They are superior to traditional elastomers primarily in their ease of fabrication. Like traditional elastomers they offer benefits including reduction in noise emissions and improved wear resistance in metal components that are in contact with such parts in the railcar suspension system. However, viscoelastic materials, such as the railroad bearing thermoplastic elastomer suspension element (or elastomeric pad), are known to develop self-heating (hysteresis) under cyclic loading, which can lead to undesirable consequences. Quantifying the hysteresis heating of the pad during operation is therefore essential to predict its dynamic response and structural integrity, as well as, to predict and understand the heat transfer paths from bearings into the truck assembly and other contacting components. This study investigates the internal heat generation in the suspension pad and its impact on the complete bearing assembly dynamics and thermal profile. Specifically, this paper presents an experimentally validated finite element thermal model of the elastomeric pad and its internal heat generation. The steady-state and transient-state temperature profiles produced by hysteresis heating of the elastomer pad are developed through a series of experiments and finite element analysis. The hysteresis heating is induced by the internal heat generation, which is a function of the loss modulus, strain, and frequency. Based on previous experimental studies, estimations of internally generated heat were obtained. The calculations show that the internal heat generation is impacted by temperature and frequency. At higher frequencies, the internally generated heat is significantly greater compared to lower frequencies, and at higher temperatures, the internally generated heat is significantly less compared to lower temperatures. However, during service operation, exposure of the suspension pad to higher loading frequencies above 10 Hz is less likely to occur. Therefore, internal heat generation values that have a significant impact on the suspension pad steady-state temperature are less likely to be reached. The commercial software package ALGOR 20.3TM is used to conduct the thermal finite element analysis. Different internal heating scenarios are simulated with the purpose of obtaining the bearing suspension element temperature distribution during normal and abnormal conditions. The results presented in this paper can be used in the future to acquire temperature distribution maps of complete bearing assemblies in service conditions and enable a refined model for the evolution of bearing temperature during operation.
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Idarraga, Guillermo, Liu Yang, Farhad Abad, Yang Huang, Saishuai Dai, Qing Xiao, Saeid Lotfian und Feargal Brennan. „Hyperelastic Modelling of Elastomers for Wave Energy Convertors“. In ASME 2023 42nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/omae2023-100523.

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Abstract Flexible Wave Energy Converters (WECs) have gained considerable attention in recent years due to their ability to adapt to the dynamic conditions of the waves. To reach commercialization, further analyses should be done to guarantee survivability, and numerical models have been used to predict the structural response of WECs. However, the accuracy of any prediction will depend on the validity of the hyperelastic model employed and the reliability of the test data input into the chosen model. In this work, two elastomers are selected and characterised by plane stress, plane strain and biaxial stress conditions. Hyperelastic models are evaluated using ABAQUS, and hyperelastic constants are obtained for each elastomer. For the validation of the hyperelastic constants, experiments are conducted for one of the elastomers on the top of an oscillating water column (OWC) WEC. From the experiments, the deformation of the elastomeric membrane under wave conditions is obtained and compared with the results of a numerical model using the hyperelastic constants. From the results, the hyperelastic models describe well the deformation trend of the membrane on the top of the OWC, however further analysis should be done to improve the accuracy of the models.
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Saarikoski, Tuomas, und Matti Pietola. „HIL Simulation of Elastomer Supported Machine Bed Dynamics“. In 8th FPNI Ph.D Symposium on Fluid Power. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/fpni2014-7847.

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This paper presents a Hardware-in-the-Loop (HIL) test setup used for studying the dynamics of an elastomer supported machine bed. The setup uses real elastomer dampers and modeled machine dynamics (process model) connected together via real-time interface. The HIL approach was chosen since the elastomers are a critical part of the system, however, determining their properties for engineering needs can be a challenging task. Accurate elastomer models include many parameters that can only be determined by experimentally, and even then their implementation for real-life applications is not always practical. Using real elastomers supports in the simulation removes uncertainties associated with classic elastomer models, while simulated process makes it possible to test different scenarios fast and with good repeatability. The process model includes a description of the machine body, a rotating unbalanced drive mechanism creating cyclic loading and external excitation forces acting on the machine. The method enables testing of machine bed supports in a realistic operating environment. A test rig was built for housing the elastomers incorporating a hydraulic actuator for producing the process movement. The hydraulic circuit was designed for good dynamic performance with predictive control to minimize delays in the real-time interface. It was found that the HIL-setup can provide fast and accurate information about the plant model behavior in different operating scenarios using the elastomer supports.
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Berichte der Organisationen zum Thema "Elastomere"

1

Banks, H. T., Laura K. Potter, Gabriella A. Pinter, M. J. Gaitens und L. C. Yanyo. Models for Nonlinear Elastomers. Fort Belvoir, VA: Defense Technical Information Center, Januar 2001. http://dx.doi.org/10.21236/ada454439.

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2

Wilder, B. Evaluation of filled elastomers. Office of Scientific and Technical Information (OSTI), Mai 1990. http://dx.doi.org/10.2172/6951943.

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3

Fletcher, R. W., und H. W. Cheung. Energetic Thermoplastic Elastomer Synthesis. Fort Belvoir, VA: Defense Technical Information Center, Januar 1989. http://dx.doi.org/10.21236/ada203594.

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4

Manser, G. E., und R. W. Fletcher. Energetic Thermoplastic Elastomer Synthesis. Fort Belvoir, VA: Defense Technical Information Center, April 1988. http://dx.doi.org/10.21236/ada196885.

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5

Chien, James C. Thermoplastic Elastomer LOVA Binders. Fort Belvoir, VA: Defense Technical Information Center, Mai 1991. http://dx.doi.org/10.21236/ada236586.

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6

Mark, J. E. Novel Methods for Reinforcing Elastomers. Fort Belvoir, VA: Defense Technical Information Center, April 1989. http://dx.doi.org/10.21236/ada210150.

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7

Schapery, R. A. Damage Evolution in Filled Elastomers. Fort Belvoir, VA: Defense Technical Information Center, August 1991. http://dx.doi.org/10.21236/ada240532.

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8

Guess, T. R. Isothermal aging of three polyurethane elastomers. Office of Scientific and Technical Information (OSTI), Mai 1996. http://dx.doi.org/10.2172/230372.

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9

Sandoval, Cynthia W., und Stephen A. Birdsell. Filled Elastomer Thickness Measurement Technique Evaluation. Office of Scientific and Technical Information (OSTI), März 2014. http://dx.doi.org/10.2172/1122049.

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10

Saini, Ravinder, Saeed Hassan und Abdulkhaliq Alshadidi. Effect of chemical disinfection on the dimensional stability of polyvinyl ether siloxane impression material: a systemic review and meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, Mai 2023. http://dx.doi.org/10.37766/inplasy2023.5.0042.

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Review question / Objective: Does chemical disinfection effects the accuracy and dimensional stability of the dental impressions made from PVES elastomers?” Eligibility criteria: All in vitro studies with data on the effects of disinfection on PVES were included. Studies were selected based on the following criteria: (1) studies should have comparison data between native and disinfected PVES impressions, (2) methods of disinfection should be chemical disinfectants, and (3) studies published in English.pves,
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