Results 11 to 20 of about 29,601 (260)
Young's modulus and ?-relaxation of amorphous polymers [PDF]
Journal de Physique III, 1991 The mechanical behaviour of polymers have been studied as a function of time and temperature. The influence of a critical temperature or critical strain rate have been pointed out which may be related to relaxation phenomena. This study, carried out on Poly Methyl Methacrylate, shows that this relaxation phenomena can be associated to the β-relaxation.
Muracciole, Jean-Michel, Bertin, Y.
openaire +2 more sources
New normalized constant modulus algorithms with relaxation [PDF]
IEEE Signal Processing Letters, 1997 A new normalized constant modulus algorithm is proposed that has a more desirable error performance surface (EPS) than the existing constant modulus blind equalization algorithms. We show that for an autoregressive channel, a well-known class of undesirable local solutions (ULSs) does not exist.
Tanrikulu, O +2 more
openaire +3 more sources
Structural Relaxation Monitored by Instantaneous Shear Modulus [PDF]
Physical Review Letters, 1998 This paper reports on aging of the silicone oil MS704 for sudden changes of temperature from 210.5 to 209.0 K and from 207.5 to 209.0 K studied by continuously monitoring the instantaneous shear modulus G‘. The results are interpreted within the Tool-Narayanaswamy formalism with a reduced time definition based on a recently proposed expression for the ...
Olsen, Niels Boye +2 more
openaire +2 more sources
Simple average expression for shear-stress relaxation modulus [PDF]
Physical Review E, 2016 Focusing on isotropic elastic networks we propose a novel simple-average expression $G(t) = μ_A - h(t)$ for the computational determination of the shear-stress relaxation modulus $G(t)$ of a classical elastic solid or fluid and its equilibrium modulus $\G_{eq} = \lim_{t \to \infty} G(t)$. Here, $μ_A = G(0)$ characterizes the shear transformation of the
Wittmer, J. P., Xu, H., Baschnagel, J.
openaire +4 more sources
Instantaneous Modulus Test of Solid Propellant and the Impact on the Structural Integrity of the Charge [PDF]
Hangkong bingqiHydroxyl-terminated polybutadiene (HTPB) propellant is investigated in this study. At three initial tensile strain rates of 100 %/s, 50 %/s and 12 %/s, the propellant relaxation modulus tests are carried out, and the relaxation modulus curves of the ...
Wang Yibo, Tang Qi, Dong Meng, Jiang Pengchen
doaj +1 more source
Nonlinear Analysis of Thermoviscoelasticity of Laminated Composites [PDF]
Engineering and Technology Journal, 2010 The nonlinear thermoviscoelastic behavior of composite thin plates isinvestigated. An experimental program covers an achievement of creep tests under different temperatures, dimensions of specimens and distribution loads to describe the equation of creep
Muhsin J.Jweeg +2 more
doaj +1 more source
Relaxation modulus—complex modulus interconversion for linear viscoelastic materials
Mechanics of Time-Dependent Materials, 2012 ORONA ...
García Barruetabeña, Jon +5 more
openaire +2 more sources
Effect of Microstructure on Micro-Mechanical Properties of Composite Solid Propellant
Micromachines, 2021 This study was aimed at determining the effect of microstructure on the macro-mechanical behavior of a composite solid propellant. The microstructure model of a composite solid propellant was generated using molecular dynamics algorithm.
Tianpeng Li +3 more
doaj +1 more source
Dynamic Characteristic Master Curve and Parameters of Different Asphalt Mixtures
Applied Sciences, 2022 Using an AMPT tester and based on laboratory tests, this paper performed a comparative study on the dynamic characteristics of different asphalt mixtures, analyzed the influence of different asphalt binders on the characteristic parameters of the dynamic
Shijie Ma +5 more
doaj +1 more source
On weak regularity requirements of the relaxation modulus in viscoelasticity [PDF]
Communications in Applied and Industrial Mathematics, 2019 Abstract The existence and uniqueness of solution to a one-dimensional hyperbolic integro-differential problem arising in viscoelasticity is here considered. The kernel, in the linear viscoelasticity equation, represents the relaxation function which is characteristic of the considered material.
Carillo, Sandra +3 more
openaire +5 more sources