Effect of particle dipolar interactions on the viscoelastic response of dilute ferrofluids undergoing oscillatory shear

2021 ◽  
Vol 33 (9) ◽  
pp. 092004
Author(s):  
Francisco Ricardo Cunha ◽  
Adriano Possebon Rosa
Keyword(s):  
Oscillatory Shear ◽  
Viscoelastic Response ◽  
Dipolar Interactions

Interfacial viscoelastic response to oscillatory shear deformations

1987 ◽  
Vol 119 (2) ◽  
pp. 303-314 ◽  
Author(s):  
J Prieditis ◽  
N.R Amundson ◽  
R.W Flumerfelt
Keyword(s):  
Oscillatory Shear ◽  
Viscoelastic Response ◽  
Shear Deformations

Nonlinear Viscoelastic Response of Crumb Rubber Modified Asphalt Binder Under Large Strains

2020 ◽  
Vol 2674 (3) ◽  
pp. 139-149
Author(s):  
Saqib Gulzar ◽  
B. Shane Underwood
Keyword(s):  
Asphalt Binder ◽  
Crumb Rubber ◽  
Oscillatory Shear ◽  
Asphalt Binders ◽  
Large Strains ◽  
Viscoelastic Response ◽  
Modified Asphalt ◽  
Nonlinear Viscoelastic ◽  
Modified Asphalt Binder ◽  
Polymer Modified Asphalt

Agencies have been increasing their use of polymer modified asphalt binders in recent years to address performance issues and lengthen the useful life of their pavements. When deployed these materials likely experience strain levels exceeding their linear viscoelastic (LVE) limits. The same situation exists in non-polymer modified asphalt binders as well, but the effect may be more pronounced in polymer modified systems because of their bi-phasic nature. In this study, terminally blended crumb rubber (CR-TB) modified asphalt is studied to understand and quantify the nonlinear viscoelastic response under large strains. The CR-TB binders are extensively used in pavements subjected to high vehicular loads and extreme climatic conditions; thereby, their response under large strains becomes more critical. The current standard characterization techniques are based on LVE response using small amplitude oscillatory shear rheology only and do not consider the behavior of binders under large strains. In this study, large amplitude oscillatory shear (LAOS) rheology is used as a framework to more thoroughly investigate the complete response of the CR-TB modified asphalt binder under large strains at 30°C, 40°C, 50°C, and 60°C and at the frequencies of 0.5, 1, and 5 Hz. The LAOS response is analyzed using Fourier-transform rheology and the orthogonal stress decomposition method involving Chebyshev polynomial representation. It is found that nonlinearity manifests greatly in this study material as strain levels increase and frequencies decrease. The relative nonlinearity increases with increasing strain amplitude and is more significant towards lower end of the tested temperature range. The CR-TB binder shows strain-stiffening/softening and shear-thinning/thickening behavior depending upon a specific temperature, strain level, and frequency.

scholarly journals Non-linear viscoelastic response of magnetic fiber suspensions in oscillatory shear

2011 ◽  
Vol 166 (7-8) ◽  
pp. 373-385 ◽  
Author(s):  
P. Kuzhir ◽  
A. Gómez-Ramírez ◽  
M.T. López-López ◽  
G. Bossis ◽  
A.Yu. Zubarev
Keyword(s):  
Oscillatory Shear ◽  
Viscoelastic Response ◽  
Fiber Suspensions ◽  
Non Linear ◽  
Linear Viscoelastic

THE MAGNETIC PROPERTIES OF A FERROFLUID WITH DIPOLAR INTERACTIONS

1985 ◽  
Vol 46 (C6) ◽  
pp. C6-283-C6-286
Author(s):  
A. Bradbury ◽  
S. Menear ◽  
R. W. Chantrell ◽  
K. O'Grady
Keyword(s):  
Magnetic Properties ◽  
Dipolar Interactions

Efficient Treatment of Fixed and Induced Dipolar Interactions

2000 ◽  
Vol 653 ◽  
Author(s):  
Celeste Sagui ◽  
Thoma Darden
Keyword(s):  
Molecular Dynamics ◽  
Md Simulations ◽  
Lagrangian Formalism ◽  
Dipolar Interactions ◽  
Time Step ◽  
Efficient Treatment ◽  
Particle Mesh Ewald ◽  
Fixed Charges ◽  
Self Consistency ◽  
Induced Dipoles

AbstractFixed and induced point dipoles have been implemented in the Ewald and Particle-Mesh Ewald (PME) formalisms. During molecular dynamics (MD) the induced dipoles can be propagated along with the atomic positions either by interation to self-consistency at each time step, or by a Car-Parrinello (CP) technique using an extended Lagrangian formalism. The use of PME for electrostatics of fixed charges and induced dipoles together with a CP treatment of dipole propagation in MD simulations leads to a cost overhead of only 33% above that of MD simulations using standard PME with fixed charges, allowing the study of polarizability in largemacromolecular systems.

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