Results 231 to 240 of about 27,965 (266)

Establishing continuous relaxation spectrum based on complex modulus tests to construct relaxation modulus master curves in compliance with linear viscoelastic theory

Construction and Building Materials, 2018
Abstract A number of methods have been developed to determine the relaxation modulus, which is a fundamental material property that characterizes the rheological behavior of viscoelastic materials. However, the relaxation modulus master curves constructed using the current methods are likely to be accompanied by evident deficiencies. To correct these
Hanqi Liu, Rong Luo, Huijie Lv
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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
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ChemInform Abstract: STRESS RELAXATION MODULUS OF A COMMERCIAL GLASS

Chemischer Informationsdienst, 1973
AbstractDer Spannungsrelaxationsmodul unter Kompression wurde an einem Behälterglas (71 Gew.% S102, 15 Na2O; 4,5 MgO; 8 CaO; 1,5 Al2O3) untersucht.
J. J. MILLS, J. L. SIEVERT
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Dielectric relaxation studies of nanocrystalline CuAlO2 using modulus formalism

Journal of Applied Physics, 2007
Transparent semiconductor CuAlO2 in nanodimension was prepared by mechanical alloying of Cu2O and α-Al2O3 powders in toluene medium. The formation of single phase CuAlO2 with an average crystallite size of 45 nm was confirmed by x-ray diffraction analysis. The nanocrystalline nature of CuAlO2 was confirmed by atomic force microscopy.
T. Prakash, K. Padma Prasad, R. Kavitha, S. Ramasamy, B. S. Murty   +4 more
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Stress Relaxation and Tensile Modulus of Polymeric Fibers

Textile Research Journal, 1991
With increasingly diversified demands on the mechanical properties of polymeric fibers, the question of whether properties can be varied independently or are related has become imperative. This report is concerned with the relation between tensile modulus and stress relaxation.
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Elastic modulus and relaxation times in telechelic associating polymers

Colloid and Polymer Science, 2003
Dynamic mechanical measurements have been performed on solutions of HEUR-associating polymers with different molar mass, end-cap length, and extent of modification. These systems appear as Maxwellian fluids although at high frequencies a short-time relaxation process is evidenced for the systems with a strong hydrophobicity.
Jean-François Le Meins, Jean-François Tassin   +1 more
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Calculation of discrete relaxation modulus and creep compliance

Rheologica Acta, 1999
Muntz theorems from classical approximation theory are used to lay the mathematical foundations for discrete spectral representations of the relaxation modulus and creep conpliance. Algorithms that can automatically generate nonnegative discrete relaxation and retardation strengths are formulated by using the nonnegative least square method.
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Alternative Function to Represent Relaxation Modulus of Viscoelastic Materials

Journal of Materials in Civil Engineering, 2012
The generalized Maxwell model has been widely adopted for the prediction of relaxation modulus of viscoelastic materials, specifically asphalt materials. For practical reasons, relaxation modulus is rarely measured; instead it is predicted from creep compliance tests.
Chun-Hsing Ho, Pedro Romero
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Thermally stimulated modulus relaxation in polymers: method and interpretation

Polymer, 1997
Abstract We have measured the thermally stimulated decay of the dielectric modulus M(T, t) for poly(vinylacetate) by monitoring the electric field E(t) under the condition of a constant dielectric displacement for t > 0. This thermally stimulated polarization experiment is realized by cooling the sample at zero field to well below its glass ...
Wagner, H., Richert, R.
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Dynamic master curves from the stretched exponential relaxation modulus

Journal of Polymer Science Part B: Polymer Physics, 1997
The stretched exponential relaxation modulus of regular and polymer modified asphalts is studied. It is shown that this relaxation function can generate the dynamic functions of these materials very well on any finite interval of the reduced frequencies (master curves). By continuation one can, in principle, cover the whole region of master curves of G′
L. Zanzotto, J. Stastna
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