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Viscoelasticity of new generation thermoplastic polyurethane vibration isolators
Bek, Marko (Avtor), Betjes, Joris (Avtor), Bernstorff, Bernd Steffen von (Avtor), Emri, Igor (Avtor)

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Izvleček
This paper presents the analysis of pressure dependence of three thermoplastic polyurethane (TPU) materials on vibration isolation. The three TPU Elastollan materials are 1190A, 1175A, and 1195D. The aim of this investigation was to analyze how much the performance of isolation can be enhanced using patented Dissipative bulk and granular systems technology . The technology uses granular polymeric materials to enhance materials properties (without changing its chemical or molecular composition) by exposing them to "self-pressurization," which shifts material energy absorption maxima toward lower frequencies, to match the excitation frequency of dynamic loading to which a mechanical system is exposed. Relaxation experiments on materials were performed at different iso- baric and isothermal states to construct mastercurves, the time-temperature-pressure interrelation was modeled using the Fillers-Moonan-Tschoegl model. Dynamic material functions, related to isolation stiffness and energy absorption, were determined with the Schwarzl approximation. An increase in stiffness and energy absorption at selected hydrostatic pressure, compared to its stiffness and energy absorption at ambient conditions, is represented with K_k(p, [omega]), defining the increase in stiffness and K_d (p, [omega]), defining the increase in energy absorption. The study showed that close to the glassy state, moduli of 1190A and 1195D are about 6-9 times higher compared to 1175A, whereas their properties at ambient conditions are, for all practical purposes, the same. TPU 1190A turns out to be most sen- sitive to pressure: at 300 MPa its properties are shifted for 5.5 decades, while for 1195D and 1175A this shift is only 3.5 and 1.5 decades, respectively. In conclusion, the stiffness and energy absorption of isolation may be increased with pressure for about 100 times for 1190A and 1195D and for about 10 times for 1175A. Published by AIP Publishing.

Jezik:Angleški jezik
Ključne besede:vibration isolators, viscoelasticity, hydrostatics, polymers, continuum mechanics
Vrsta gradiva:Delo ni kategorizirano (r6)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FS - Fakulteta za strojništvo
Št. strani:18
Številčenje:12, 29
UDK:539.3:678
COBISS.SI-ID:15825947 Povezava se odpre v novem oknu
Število ogledov:655
Število prenosov:461
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Gradivo je del revije

Naslov:Physics of Fluids
Založnik:AIP Publishing
ISSN:1070-6631
COBISS.SI-ID:37828865 Povezava se odpre v novem oknu

Gradivo je financirano iz projekta

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Številka projekta:P2-0264
Naslov:Trajnostni polimerni materiali in tehnologije

Licence

Licenca:CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
Opis:Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.
Začetek licenciranja:08.01.2018

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:izolatorji vibracij, viskoelastičnost, hidrostatičnost, polimeri, mehanika kontinuuma

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