Rheology and Non-Newtonian Fluids

Irgens, Fridtjov

doi:10.1007/978-3-319-01053-3

Cited by 136 publications

(108 citation statements)

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“…An excellent appraisal of the departure of rheological fluids from Newtonian behavior has been provided by Chaabra and Richardson [5] and also more recently by Irgens [6]. Viscoelastic fluids belong to the class of non-Newtonian fluids which exhibit both viscous and elastic effects, in varying proportions depending on the constitution of the liquid.…”

Section: Introductionmentioning

confidence: 99%

Analytical solutions for wall slip effects on magnetohydrodynamic oscillatory rotating plate and channel flows in porous media using a fractional Burgers viscoelastic model

Maqbool¹,

Bég

Sohail

et al. 2016

Eur. Phys. J. Plus

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Section: Introductionmentioning

confidence: 99%

Analytical solutions for wall slip effects on magnetohydrodynamic oscillatory rotating plate and channel flows in porous media using a fractional Burgers viscoelastic model

Maqbool¹,

Bég

Sohail

et al. 2016

Eur. Phys. J. Plus

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“…Liquid has a definite volume, but not a definite form [61]. A common property of liquid is that they can only transmit a pressure to solid or liquid surfaces bounding the liquid.…”

Section: Non-newtonian Fluids For Liquid Body Armourmentioning

confidence: 99%

“…A common property of liquid is that they can only transmit a pressure to solid or liquid surfaces bounding the liquid. Tangential forces on such surfaces will first occur when there is a relative motion between the liquid and the solid or liquid surface [60][61][62]. Such forces are frictional forces on the surface of bodies moving through air or water.…”

Section: Non-newtonian Fluids For Liquid Body Armourmentioning

confidence: 99%

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Contemporary Personal Ballistic Protection (PBP)

Ciesielska–Wróbel¹

2017

Textiles for Advanced Applications

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The review concerns existing contemporary protective equipment and their components serving against ballistic and non-ballistic threats of different sorts. The main focus, however, is on the personal ballistic protection (PBP) based on textile components and their role in the protective elements. Soft ballistic protections are crucial Soft ballistic protections are crucial elements of PBP, for example in military and law enforcements. Although the subject of PBP was limited in this chapter to soft ballistic protection, other elements, e.g. hard ballistic protection, stab-resistant vests, dual threat, so-called in-conjunction protective elements, modern helmets, were also mentioned in this chapter to demonstrate positioning of the soft ballistic protection and other elements in the global personal protection approach. Apart from it, the chapter contains selected information concerning high-performance polymers and fibres as well as a brief notes about their application in protective panels being basic elements of any protective element. The final remarks concern the most up-to-date approach in relation to ballistic protection, which is immersing high-performance fibres into non-Newtonian liquid substances having the ability of ordering their chemical particles and changing into a high concentration and high segregation lattice under the influence of kinetic energy impact.

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“…This non-Newtonian fluid behavior is described by the model developed originally by Norton [3] to describe creep in steel at high-temperatures, see also Irgens [4] and Besson et al [5]. Another interesting conclusion is that the rateindependent part of the model simply consists of an elastic spring, see also Dall' Asta and Ragni [6].…”

Section: Introductionmentioning

confidence: 96%

Energy and Transmissibility in Nonlinear Viscous Base Isolators

Μάρκου¹,

Manolis²

2016

Journal of Theoretical and Applied Mechanics

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Abstract. High damping rubber bearings (HDRB) are the most commonly used base isolators in buildings and are often combined with other systems, such as sliding bearings. Their mechanical behaviour is highly nonlinear and dependent on a number of factors. At first, a physical process is suggested here to explain the empirical formula introduced by J.M. Kelly in 1991, where the dissipated energy of a HDRB under cyclic testing, at constant frequency, is proportional to the amplitude of the shear strain, raised to a power of approximately 1.50. This physical process is best described by non-Newtonian fluid behaviour, originally developed by F.H. Norton in 1929 to describe creep in steel at high-temperatures. The constitutive model used includes a viscous term, that depends on the absolute value of the velocity, raised to a non-integer power. The identification of a three parameter Kelvin model, the simplest possible system with nonlinear viscosity, is also suggested here. Furthermore, a more advanced model with variable damping coefficient is implemented to better model in this complex mechanical process. Next, the assumption of strain-rate dependence in their rubber layers under cyclic loading is examined in order to best interpret experimental results on the transmission of motion between the upper and lower surfaces of HDRB. More specifically, the stress-relaxation phenomenon observed with time in HRDB can be reproduced numerically, only if the constitutive model includes a viscous term, that depends on the absolute value of the velocity raised to a non-integer power, i. e., the Norton fluid previously mentioned. Thus, it becomes possible to compute the displacement transmissibility function between the top and bottom surfaces of HDRB base isolator systems and to draw engineering-type conclusions, relevant to their design under timeharmonic loads.

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Rheology and Non-Newtonian Fluids

Cited by 136 publications

References 0 publications

Analytical solutions for wall slip effects on magnetohydrodynamic oscillatory rotating plate and channel flows in porous media using a fractional Burgers viscoelastic model

Analytical solutions for wall slip effects on magnetohydrodynamic oscillatory rotating plate and channel flows in porous media using a fractional Burgers viscoelastic model

Contemporary Personal Ballistic Protection (PBP)

Energy and Transmissibility in Nonlinear Viscous Base Isolators

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