000014096 001__ 14096
000014096 005__ 20161115100141.0
000014096 04107 $$aeng
000014096 046__ $$k2016-08-21
000014096 100__ $$aSahraoui, Sohbi
000014096 24500 $$aFractional derivatives model to predict high frequency moduli of acoustic foams

000014096 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000014096 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000014096 506__ $$arestricted
000014096 520__ $$2eng$$aThis paper presents a time domain method to determine viscoelastic properties of open-cell foams on a wide frequency range. This method is based on the adjustment of the stress-time relationship, obtained from relaxation tests on polymeric foams samples under static compression, with the four fractional derivatives Zener model. The experimental relaxation function, well described by the Mittag-Leffler function, allows to predict straightforward the frequency-dependence of complex modulus of polyurethane foams. A curve was reconstructed on the reduced frequency range (0.1Hz – 1 MHz) using the time-temperature superposition principle. Very good agreement was obtained between experimental complex moduli values and the fractional Zener model predictions. The proposed time domain method may constitute an improved alternative to resonant and non-resonant techniques often used for dynamic characterization of polymers for the determination of viscoelastic moduli on a broad frequency range.

000014096 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000014096 653__ $$a

000014096 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000014096 720__ $$aSahraoui, Sohbi
000014096 8560_ $$ffischerc@itam.cas.cz
000014096 8564_ $$s130367$$uhttps://invenio.itam.cas.cz/record/14096/files/PO.FS09-2.02.279.pdf$$yOriginal version of the author's contribution as presented on CD,  page 3462, code PO.FS09-2.02.279
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000014096 962__ $$r13812
000014096 980__ $$aPAPER