Results 211 to 220 of about 8,782 (261)

Vanishing Relaxation Limit of Viscoelasticity

Mathematics and Mechanics of Solids, 1996
A rate-type viscoelastic material with very small relaxation time parameter should be almost an elastic material intuitively. In this paper, we shall prove that smooth solutions of initial-boundary value problems, with periodic boundary conditions of a one-dimensional elastic body, can be obtained as the vanishing relaxation limits of the corresponding
Wu, Yumei, Liu, I-Shih
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Viscoelastic relaxation in fluids

Bulletin of the Russian Academy of Sciences: Physics, 2015
The shear elasticity of different fluids are studied experimentally at relatively low frequencies of 40 and 74 kHz. The real and imaginary shear moduli of several liquids are measured using the acoustic resonance method. A low-frequency viscoelastic relaxation process is assumed to occur in a fluid with a period of relaxation much longer than the ...
B. B. Badmaev, B. B. Damdinov, T. S. Dembelova   +2 more
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Stress Relaxation of Viscoelastic Material

Transactions of the Society of Rheology, 1974
The stress relaxation of viscoelastic material after cessation of steady-state flow has been investigated. A method is proposed that allows fairly accurate prediction of the shear stress component, P12(t), as well as the first normal stress component, P11–P22(t), for a relatively wide range of time and shear rates.
B. Hlaváček, J. F. Stanislav, F. A. Seyer   +2 more
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Viscoelastic relaxations in thermotropic polybibenzoates

Journal of Non-Crystalline Solids, 1991
Abstract The dynamic mechanical relaxations of two thermotropic polybibenzoates containing the biphenyl group in the main chain have been determined in the temperature range from −150 to 130°C, at several frequencies. The two polyesters are poly(heptamethylene p , p ′-bibenzoate) (P7MB) and poly(oxyditrimethylene p , p ′-bibenzoate) (PDTMB).
J.M Pereña, M.M Marugán, A Bello, E Pérez   +3 more
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Magnetic Relaxation in a Viscoelastic Ferrocolloid

Colloid Journal, 2020
A method has been proposed for calculating linear dynamic magnetization of a viscoelastic ferrocolloid in a constant magnetic field (displacement field). The magnetic phase of the colloid consists of Brownian ferromagnetic nanoparticles placed into a Jeffry’s fluid.
V. V. Rusakov, Yu. L. Raikher
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Viscoelastic Relaxation in Hydrated Melts

The Journal of Chemical Physics, 1971
Measurements of longitudinal absorption for the system Ca(NO3)2·3.2H2O reveal the presence of a relaxation process. This relaxation is viscoelastic, i.e., the liquid is transformed into a pseudoglass. Shear velocity measurements conform the appearance of a viscoelastic relaxation with the condition τv≈τs in this system.
G. S. Darbari, M. R. Richelson, S. Petrucci   +2 more
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Viscoelastic Relaxation in B2O3

1978
The relative ease with which its viscosity can be measured over a wide range of temperature (260–1600°C) has made B2O3 one of the materials most often used to test viscosity theories. It exhibits two Arrhenius regions: a high temperature region between 800–1400°C and a low temperature one, 260–350°C.
P. B. Macedo, C. J. Montrose, C. T. Moynihan, C. C. Lai   +3 more
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Relaxation in elastic and viscoelastic materials

Journal of Materials Science, 1984
The mechanical compliance and modulus retardation/relaxation functions are examined in terms of a general behaviour which contains more than one process. An analytical approach to the transformation in the anelastic response between the compliance and the modulus is derived and applied to a cooperative model of relaxation behaviour. In particular it is
Robert M. Hill, Leonard A. Dissado
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The Relaxed Work Functional in Linear Viscoelasticity

Mathematics and Mechanics of Solids, 2004
The relaxed work from a history H' to a history H is defined as the minimum work required to approach H via a sequence of continuations of H'. I prove three basic properties of the relaxed work: subadditivity, lower semicontinuity with respect to H for fixed H', and two dissipation inequalities.
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Viscoelastic relaxation of polydimethylsiloxane liquids

Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1964
Abstract The shear mechanical impedance of six polydimethylsiloxane liquids of viscosity grades ranging from 100 to 100000 cS has been measured over the frequency range 10 kc/s to 78 Mc/s, and at temperatures from –50 to +50 °C. It was found possible to reduce the experimental data for each liquid to give a single curve for each ...
A. J. Barlow, G. Harrison, J. Lamb
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