Determination of the Viscoelastic Properties of Polymer Films Using a Compensated Phase-Locked Oscillator Circuit

2002 ◽  
Vol 74 (1) ◽  
pp. 125-131 ◽  
Author(s):  
Seok-Won Lee ◽  
William D. Hinsberg ◽  
Kay K. Kanazawa
Keyword(s):  
Polymer Films ◽  
Viscoelastic Properties ◽  
Oscillator Circuit

MODELING OF NONLINEAR VIBRATION PROBLEMS WITH FLUID FLOWS THROUGH PIPELINES

2018 ◽  
pp. 44-47
Author(s):  
F.J. Тurayev
Keyword(s):  
Differential Equations ◽  
Nonlinear Vibration ◽  
Viscoelastic Properties ◽  
Construction Material ◽  
Fluid Flows ◽  
Variable Coefficients ◽  
Algebraic Equations ◽  
Flowing Liquid ◽  
Vibration Problems

In this paper, mathematical model of nonlinear vibration problems with fluid flows through pipelines have been developed. Using the Bubnov–Galerkin method for the boundary conditions, the resulting nonlinear integro-differential equations with partial derivatives are reduced to solving systems of nonlinear ordinary integro-differential equations with both constant and variable coefficients as functions of time.A system of algebraic equations is obtained according to numerical method for the unknowns. The influence of the singularity of heredity kernels on the vibrations of structures possessing viscoelastic properties is numerically investigated.It was found that the determination of the effect of viscoelastic properties of the construction material on vibrations of the pipeline with a flowing liquid requires applying weakly singular hereditary kernels with an Abel type singularity.

Combined determination of the mechanical characteristics of polymer films

1968 ◽  
Vol 1 (5) ◽  
pp. 84-87
Author(s):  
O. F. Shlenskii ◽  
N. N. Khovanskaya ◽  
V. V. Lavrent'ev
Keyword(s):  
Polymer Films ◽  
Mechanical Characteristics

Determination of the Viscoelastic Properties of Apple Flesh

1976 ◽  
Vol 19 (2) ◽  
pp. 0346-0348 ◽  
Author(s):  
J. G. De Baerdemaeker ◽  
L. J. Segerlind
Keyword(s):  
Viscoelastic Properties
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