Results 231 to 240 of about 29,601 (260)

Relaxation Modulus Model of Aged Asphalt Mixture

Journal of Highway and Transportation Research and Development (English Edition), 2015
AbstractThe asphalt mixture, AC - 13 C, is aged in an oven for five different periods, and then, stress relaxation tests are conducted at −5°C on the aged samples to study the effect of aging on the relaxation of the asphalt mixtures and to build the relaxation modulus of the asphalt mixture coupled with the aging factor.
Xiao-ge Tian, Liang-jun Liu, Fa-mei Yu, Lin He   +3 more
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Fitting methods for relaxation modulus of viscoelastic materials

Journal of Central South University of Technology, 2007
Based on viscoelastic theory, two new computational methods of solving linear equations and minimum value of the 1-norm were put forward for transforming Kohlrausch-William-Watts (KWW) function of viscoelastic materials to the generalized Maxwell model. The computational methods for the Maxwell model fitting were achieved in MATLAB software.
Ji-an Duan, Cheng-ling Yang, Ci-jun Shuai   +2 more
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RELAXATION OF ELASTIC MODULUS AFTER COLD-ROLLING

1985
The structural relaxation after cold-rolling (30%) of Metglas 2826A (Fe32Ni36Cr14P12B6) was measured by means of elastic modulus and internal friction in a vibrating-reed system during stepwise annealing. Relaxation occurs already at room temperature and increases Young's modulus up to 160 °C. At higher temperatures the effect changes its sign. It will
Klaus BOTHE, Hartmut NEUHÄUSER
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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 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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On the nature of the shear viscosity and shear modulus relaxation in metallic glasses

Journal of Physics: Condensed Matter, 2013
Analysis of independent isothermal and linear heating creep and shear modulus measurements performed on bulk Pd- and Zr-based metallic glasses provides evidence that the relaxation of their viscoelastic and elastic properties is controlled by 'defects', which respond to stress and temperature similarly to dumbbell interstitials in simple crystalline ...
A N, Tsyplakov, V A, Khonik, A S, Makarov, Yu P, Mitrofanov, G V, Afonin, N P, Kobelev, R A, Konchakov, A V, Lysenko   +7 more
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From dynamic modulus via different relaxation spectra to relaxation and creep functions

Rheologica Acta, 2001
The main goal of the paper is to compare predictive power of relaxation spectra found by different methods of calculations. The experimental data were obtained for a new family of propylene random copolymers with 1-pentene as a comonomer. The results of measurements include flow curves, viscoelastic properties, creep curves and rubbery elasticity of ...
Alexander Ya. Malkin, Irima Masalova
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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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STRUCTURAL RELAXATION OF Cu67Ti33 MONITORED BY ELASTIC MODULUS

1985
Elastic modulus and internal friction of Cu67Ti33 metallic glass were measured by means of the vibrating-reed technique. Structural relaxation and crystallization were studied in situ during a stepwise annealing treatment from room temperature up to 700 K.
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Determination of Young's Modulus Under Conditions of Relaxation

1957
Equipment for the determination of Young's modulus is described, and methods for obtaining improved axial alignment are recommended. Statistical analyses show the effect of five methods of gripping specimens on the apparent Young's modulus and the degree of misalignment.
openaire   +1 more source