Orthotropic photoviscoelasticity: Determination of mean stresses and strains in linear-viscoelastic fibrous composites

1994 ◽  
Vol 30 (3) ◽  
pp. 203-209
Author(s):  
V. P. Netrebko
Keyword(s):  
Fibrous Composites ◽  
Linear Viscoelastic ◽  
Mean Stresses

scholarly journals Determination of linear viscoelastic properties of an entangled polymer melt by probe rheology simulations

2016 ◽  
Vol 93 (1) ◽  
Author(s):  
Mir Karim ◽  
Tsutomu Indei ◽  
Jay D. Schieber ◽  
Rajesh Khare
Keyword(s):  
Viscoelastic Properties ◽  
Polymer Melt ◽  
Linear Viscoelastic ◽  
Entangled Polymer

scholarly journals i-Rheo: determining the linear viscoelastic moduli of colloidal dispersions from step-stress measurements

2020 ◽  
Vol 22 (7) ◽  
pp. 3839-3848
Author(s):  
Rodrigo Rivas-Barbosa ◽  
Manuel A. Escobedo-Sánchez ◽  
Manlio Tassieri ◽  
Marco Laurati
Keyword(s):  
Fourier Transform ◽  
Accurate Determination ◽  
Colloidal Dispersions ◽  
Stress Measurements ◽  
Viscoelastic Moduli ◽  
Linear Viscoelastic ◽  
The Fourier Transform

The Fourier transform-based method ‘i-Rheo’ allows the accurate determination of material viscoelastic moduli from step-stress measurements.

Determination of the parameters of a linear-viscoelastic thin layer using the normally-incident ultrasonic waves

2010 ◽  
Vol 19 (7) ◽  
pp. 074301
Author(s):  
Yao Gui-Jin ◽  
Lü Wei-Guo ◽  
Song Ruo-Long ◽  
Cui Zhi-Wen ◽  
Zhang Xiang-Lin ◽  
...  
Keyword(s):  
Thin Layer ◽  
Ultrasonic Waves ◽  
Linear Viscoelastic

scholarly journals Theoretical and Experimental Study of the Distribution of Stress Waves in Linear Viscoelastic Media

2019 ◽  
pp. 1-7
Author(s):  
N. V. Olali ◽  
M. A. Orukari ◽  
N. M. Zazymko ◽  
M. P. Malezhyk
Keyword(s):  
Stress Waves ◽  
Pressure Waves ◽  
Fourier Decomposition ◽  
Longitudinal Waves ◽  
Viscoelastic Media ◽  
Photoelastic Experiment ◽  
Epoxy Material ◽  
Linear Viscoelastic ◽  
Distribution Of Stress

The influence of viscoelastic properties of an optically sensitive epoxy material on the propagation of pressure waves in a rod was carried out. In the article of determination of the visco-elastic operator, the theoretical relations for the case of propagation of longitudinal waves are obtained based on the results of a photoelastic experiment. The noticeable difference between the experimental data and the calculation at the pulse end can be explained by the change in the propagation velocity of the Fourier decomposition component of the real impulse.

scholarly journals Dynamic Response of Zener-Modelled Linearly Viscoelastic Systems under Harmonic Excitation

Symmetry ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1050 ◽  
Author(s):  
Polidor Bratu ◽  
Cornelia Dobrescu
Keyword(s):  
Experimental Tests ◽  
Harmonic Excitation ◽  
Natural Soil ◽  
Response Data ◽  
High Loading Rate ◽  
Insulation Systems ◽  
Linear Viscoelastic ◽  
Vibration Parameters ◽  
Mineral Aggregates

A comprehensive investigation, including analytical modelling, numerical analysis and experimental tests, has been carried out on many linear viscoelastic systems and structures. This approach is the result of research conducted by two research institutes, ICECON and INCERC Bucharest, from Romania. Thus, analyses were performed on the dynamic behaviour of composite viscoelastic materials, anti-vibration viscoelastic systems made of discrete physical devices, road structures consisting of layers of natural soil with mineral aggregates and asphalt mixtures, and mixed mechanic insulation systems for industrial vibrations formed of elastic and viscous devices. The objectives pursued were as follows: (a) providing a mass dosage of the mixture of earth (clay, sand, mineral aggregates, water, and stabilizer) in five variants; (b) carrying out a test run with a Bomag vibratory roller with variable vibration parameters; (c) Experimental evaluation of the vibration parameters and the force transmitted to the ground, correlated with the determination of the compaction layer; (d) use of methods of analysis for physic-mechanical and geotechnical parameters; (e) rheological and numerical modeling based on Zener schematics, so the consistency and veracity of the experimental data with the numerical simulation can be determined. Finally, a study is presented for a test track, where experimental and correlated input and response data are determined to validate the rheological model with a high loading rate.

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