On the response of nonlinear viscoelastic materials in creep and stress relaxation experiments in the lubricated squeeze flow setting

2016 ◽  
Vol 28 (10) ◽  
pp. 103102 ◽  
Author(s):  
Martin Řehoř ◽  
Vít Průša ◽  
Karel Tůma
Keyword(s):  
Stress Relaxation ◽  
Squeeze Flow ◽  
Viscoelastic Materials ◽  
Nonlinear Viscoelastic ◽  
Relaxation Experiments ◽  
Nonlinear Viscoelastic Materials ◽  
Creep And Stress Relaxation

scholarly journals Magnetic resonance elastography in nonlinear viscoelastic materials under load

2018 ◽  
Vol 18 (1) ◽  
pp. 111-135 ◽  
Author(s):  
Adela Capilnasiu ◽  
Myrianthi Hadjicharalambous ◽  
Daniel Fovargue ◽  
Dharmesh Patel ◽  
Ondrej Holub ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Magnetic Resonance Elastography ◽  
Viscoelastic Materials ◽  
Nonlinear Viscoelastic ◽  
Nonlinear Viscoelastic Materials

Study on Nonlinear Viscoelastic Properties of Asphalt Mixture Based on Stress Relaxation Test

2014 ◽  
Vol 563 ◽  
pp. 48-52
Author(s):  
Lei Chen ◽  
Zhi Xin Yu ◽  
Wei Ping Cui ◽  
Li Juan Qin
Keyword(s):  
Stress Relaxation ◽  
Asphalt Mixture ◽  
Viscoelastic Behavior ◽  
Exponential Model ◽  
Relaxation Test ◽  
Asphalt Binders ◽  
Stress Relaxation Test ◽  
Nonlinear Viscoelastic ◽  
Low Temperature Cracking ◽  
Relaxation Experiments

Development of normal stress in the direction perpendicular to the asphalt mixture is an important feature of the nonlinear viscoelastic behavior of asphalt binders. In this paper, this phenomenon was studied with the help of stress-relaxation experiments in torsion.  Results indicate that stress relaxation test by controlling strain could be used to evaluate the stress relaxation ability of asphalt mixture. With the aging degree of asphalt mixtures increased, the low temperature cracking resistance got worse; the higher the temperature is, the faster the stress relaxed; the smaller the initial strain, the worse the stress relaxation ability also. The viscoelasticity of asphalt mixture could be simulated by exponential model fractional and the experiments well supported the modeling results.

Comparison of a Novel Nonlinear Viscoelastic Finite Ramp Time Correction Method to a Heaviside Step Assumption

2011 ◽  
Author(s):  
Kevin L. Troyer ◽  
Christian M. Puttlitz
Keyword(s):  
Stress Relaxation ◽  
Soft Tissues ◽  
Viscoelastic Behavior ◽  
Relaxation Modulus ◽  
Correction Method ◽  
Nonlinear Viscoelastic ◽  
Instantaneous Strain ◽  
Relaxation Experiments ◽  
Time Correction

Connective soft tissues exhibit time-dependent, or viscoelastic, behavior. In order to characterize this behavior, stress relaxation experiments can be performed to determine the tissue’s relaxation modulus. Theoretically, the relaxation modulus describes the stress relaxation behavior of the tissue in response to an instantaneous (step) application of strain. However, a step increase in strain is experimentally impossible and a pure ramp load is intractable due to the inertial limitations of the testing device. Even small deviations from an instantaneous strain application may cause significant errors in the determination of the tissue’s relaxation modulus.

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