Continuous relaxation spectrum - its advantages and methods of calculation

• Autorzy: Malkin A. Y.
• Języki publikacji: EN

Abstrakty

EN

Some advantages in treating experimental data on viscoelastic properties of polymeric materials in terms of a continuous spectrum instead of generally used fitting these data by means of a discrete relaxation times spectrum were demonstrated. The proposed continuous spectrum of a power-like type contains only three adjustable parameters. They can be found from integral characteristics of viscoelastic material, such as instantaneous modules, Newtonian viscosity, areas under shear and normal stress relaxation curves. The proposed continuous spectrum correctly reflects main peculiarities of viscoelastic properties of real polymeric materials in a wide frequency range.

Słowa kluczowe

EN

relaxation spectrum; rheology; viscoelasticity; polymer melts; inverse problems

PL

reologia; materiały plastyczne

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2006
• Tom: Vol. 11, no 2
• Strony: 235--243
• Opis fizyczny: Bibliogr. 18 poz., wykr.

Twórcy

autor

Malkin A. Y.

• Institute of Petrochemical Synthesis, Russian Academy of Sciences, Moscow, Russia,

Bibliografia

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• Tschoegl N.W. and Emri I (1993): Generating line spectra from experimental responses, Part II. Storage and loss functions. - Rheol. Acta, vol.32, No.3, pp.322-327.
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• Winter H.H. (1997): Analysis of dynamic mechanical data: inversion into a relaxation time spectrum and consistency check. - J. Non-Newton, Fluid Mech., vol.68, No.2/3. pp.225-239.