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Integration method with time step control for viscoplasticity and creep.
Integration method with time step control was proposed for viscoplasticity and creep.
BA - Obecná matematika
- 2000 •
- D
Rok uplatnění
D - Stať ve sborníku
Application of empirical viscoplastic models from the viewpoint of viscous and plastic effects
The tranformations enable to compare the viscous and plastic components (that participate in the behaviour of viscoplastic materials studied) according to the range of shearing parameters were they are measured, as the tranformed rheograms a...
BK - Mechanika tekutin
- 2004 •
- D
Rok uplatnění
D - Stať ve sborníku
Mutual Contribution of Viscous and Plastic Effects in Viscoplastic Fluids.
The notion of a viscoplastic material is inextricably linked with the notion of the so-called yield stress. In the past approximately 15 years this term has been frequently discussed in the literature, and in some papers its very existence i...
BK - Mechanika tekutin
- 2002 •
- D
Rok uplatnění
D - Stať ve sborníku
Calculations of volume flow at laminar flow of viscoplastic lubricants via circular cross-section tubes
A description of four models hierarchy is introduced in the paper. It enables movement calculation of viscoplastic lubricants at laminar flow via circular cross-section tubes....
BK - Mechanika tekutin
- 2008 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Axial flow of viscoplastic fluids obeying Robertson-Stiff model in concentric annuli
Axial Couette-Poiseuille flow of viscoplastic fluid obeying Robertson-Stiff model through the concentric annulus with the stationary outer cylinder and the inner one moving with a constant velocity is analysed......
BK - Mechanika tekutin
- 2004 •
- D
Rok uplatnění
D - Stať ve sborníku
FEM Implementation of Unified Viscoplastic Chaboche Model
The implementation of a viscoplastic Chaboche type material model in the framework of the finite element method (FEM) is presented in this paper. The multiaxial version of unified viscoplastic Chaboche model is implemented as a user...
Applied mechanics
- 2017 •
- D
Rok uplatnění
D - Stať ve sborníku
Calculation of volume flow at laminar flow of viscoplastic lubricants via circular diameter tubes
A hierarchy of four models for viscoplastic lubricants flow through pipes with circular cross-section is introduced. Different levels of complexity are used. For each model mathematical description is discussed. Actual calculation for two lu...
BK - Mechanika tekutin
- 2008 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
On the empirical modelling of non-Newtonian viscous and viscoplastic fluids
The aim of this contribution is to present a new empirical constitutive equation (with 7 parameters) enabling to model simultaneously both viscoplastic materials and purely viscous materials but not only with monotonous dependence of viscosi...
BK - Mechanika tekutin
- 2005 •
- D
Rok uplatnění
D - Stať ve sborníku
On empirical modelling of viscoplastic fluids
The aim of this contribution is to present an empirical model taking into account ageing of highly concentrated emulsions. This model enables smooth passage from modelling of viscoelastic fluid (shear-thinning behaviour) corresponding to a "fresh" ma...
BK - Mechanika tekutin
- 2004 •
- D
Rok uplatnění
D - Stať ve sborníku
On the choice of an adequate phenomenological model for viscoplastic fluids
At present a series of phenomenological models are used for the description of flow curves of viscoplastic materials. Their application for the given materials hitherto subjects to the two following factors: number of entering parameters and...
BK - Mechanika tekutin
- 2004 •
- D
Rok uplatnění
D - Stať ve sborníku
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