Results 251 to 260 of about 35,679 (298)

stress generation modulus as a counterpart of the stress relaxation modulus

open access: yes, 1995
In order to measure the time dependence of the stress relaxation modulus, E, a stress-strain deformation has to precede which induces a stress within the viscoelastic sample from which the sample relaxes. The generation of stress is characterized by a strain rate-dependent and relaxation rate-dependent portion which exhibits a maximum value, E_max ...
Brückner, Rolf   +3 more
openaire   +3 more sources

The dielectric modulus: relaxation versus retardation

Solid State Ionics, 1998
Abstract Experiments which access the quantity e*(ω) are usually termed dielectric relaxation methods, although e*(ω) and e(t) actually refer to dielectric retardation. The true dielectric relaxation, the modulus M(t), corresponds to the decay of the electric field under the conditions of a constant dielectric displacement.
Ranko Richert
exaly   +4 more sources

Determination of the relaxation modulus of a linearly viscoelastic material

Mechanics of Time-Dependent Materials, 2006
In this paper, a numerical method for computing the relaxation modulus of a linearly viscoelastic material is presented. The method is valid for relaxation tests where a constant strain rate is followed by a constant strain. The method is similar to the procedure suggested by Zapas and Phillips.
Joonas Sorvari
exaly   +2 more sources

Exact computation of creep compliance and relaxation modulus from complex modulus measurement data

Mechanics of Materials, 2008
Abstract It is well-known that for a linear viscoelastic material, there is a relationship between the complex modulus, the creep function and the relaxation modulus. It should be sufficient to collect one of these functions by a measurement to obtain the two other functions. However, this process seems to be rarely used.
J.-M. Parot, B. Duperray
exaly   +2 more sources

Stress Relaxation Modulus of a Commercial Glass

Journal of the American Ceramic Society, 1973
The stress relaxation modulus in compression of a container glass was investigated over a wide range of strain, time, modulus, and temperature. The glass is a linear viscoelastic liquid up to 2% strain, and the modulus is a smooth function of time, with no pseudorubbery plateau apparent down to a modulus of 10° dynes/cm
J. J. MILLS, J. L. SIEVERT
openaire   +1 more source

Simultaneously obtaining the Young's relaxation modulus and shear relaxation modulus of an epoxy molding compound by using DMA

2014 IEEE 16th Electronics Packaging Technology Conference (EPTC), 2014
In this work, a methodology is developed for obtaining the Young's relaxation modulus and shear relaxation modulus simultaneously by using a single dynamic mechanical analysis (DMA) experiment. The bulk modulus is assumed as a constant and calculated by Poisson's ratio.
Dao-Long Chen   +5 more
openaire   +1 more source

MODULUS AND RELAXATION OF ELASTOMERS IN TORSION AT LOW TEMPERATURES

Industrial & Engineering Chemistry, 1952
Abstract Second-order transition temperatures, Ts, indicated by volume or specific heat data, have been reported for many high polymer elastomers. Studies of the modulus-temperature relationship in the vicinity of Ts have revealed that the modulus below Ts is always enormously higher than above Ts. In the transition region, roughly from Ts+10°C
Melvin Mooney, W. E. Wolstenholme
openaire   +1 more source

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