Flow of a nonlinear viscoelastic liquid in cylindrical channels

1972 ◽  
Vol 4 (4-6) ◽  
pp. 883-889
Author(s):  
V. G. Litvinov
Keyword(s):  
Viscoelastic Liquid ◽  
Nonlinear Viscoelastic

Hydrodynamics of a Centrifugal Nonlinear-Viscoelastic Liquid Film

2019 ◽  
Vol 92 (4) ◽  
pp. 923-928
Author(s):  
N. Kh. Zinnatullin ◽  
G. N. Zinnatullina ◽  
E. I. Kul’ment’eva
Keyword(s):  
Liquid Film ◽  
Viscoelastic Liquid ◽  
Nonlinear Viscoelastic

Effects of Viscoelastic Lubricant on Squeeze Film Lubrication Between Impinging Spheres

1968 ◽  
Vol 90 (1) ◽  
pp. 113-116 ◽  
Author(s):  
V. C. Mow
Keyword(s):  
Asymptotic Solution ◽  
Film Flow ◽  
Viscoelastic Liquid ◽  
Squeeze Film ◽  
Nonlinear Viscoelastic ◽  
Pressure Peak ◽  
Viscoelastic Constants ◽  
Film Lubrication

An asymptotic solution is obtained for squeeze film flow between impinging spheres. The lubricant is assumed to be a four-constant, nonlinear, viscoelastic liquid. The pressure peak in the lubricant is very sensitive to the values of viscoelastic constants. The results agree qualitatively with those observed experimentally.

Rheological characterization of tack and viscoelasticity of compositions of crepe coating used in the Yankee dryer

TAPPI Journal ◽  
2019 ◽  
Vol 18 (11) ◽  
pp. 641-649
Author(s):  
JOSHUA OMAMBALA ◽  
CARL MCINTYRE
Keyword(s):  
Normal Force ◽  
Weight Ratio ◽  
Good Combination ◽  
Rheological Characterization ◽  
Nonlinear Viscoelastic ◽  
Coating Composition ◽  
Linear And Nonlinear ◽  
Work Done ◽  
Tissue Production

The vast majority of tissue production uses creping to achieve the required set of properties on the base sheet. The Yankee coating helps to develop the desired crepe that in turn determines properties such as bulk and softness. The adhesion of the sheet to the Yankee surface is a very important characteristic to consider in achieving the desired crepe. The coating mix usually consists of the adhesive, modifier, and release. A good combination of these components is essential to achieving the desired properties of the tissue or towel, which often are determined by trials on the machine that can be time consuming and lead to costly rejects. In this paper, five compositions of an industrial Yankee coating adhesive, modifier, and release were examined rheologically. The weight ratio of the adhesive was kept constant at 30% in all five compositions and the modifier and release ratios were varied. The normal force and work done by the different compositions have been shown at various temperatures simulating that of the Yankee surface, and the oscillatory test was carried out to explain the linear and nonlinear viscoelastic characteristic of the optimal coating composition.

Nonlinear Viscoelastic Finite Element Analysis of Adhesive Joints

1988 ◽  
Vol 16 (3) ◽  
pp. 146-170 ◽  
Author(s):  
S. Roy ◽  
J. N. Reddy
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Viscoelastic Behavior ◽  
Bonded Joints ◽  
Adhesively Bonded ◽  
Element Analysis ◽  
Adhesively Bonded Joints ◽  
Nonlinear Viscoelastic ◽  
Structural Failures ◽  
Updated Lagrangian

Abstract A good understanding of the process of adhesion from the mechanics viewpoint and the predictive capability for structural failures associated with adhesively bonded joints require a realistic modeling (both constitutive and kinematic) of the constituent materials. The present investigation deals with the development of an Updated Lagrangian formulation and the associated finite element analysis of adhesively bonded joints. The formulation accounts for the geometric nonlinearity of the adherends and the nonlinear viscoelastic behavior of the adhesive. Sample numerical problems are presented to show the stress and strain distributions in bonded joints.

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