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Implementation of the Leonov Model into FEM
The Leonov model, where the Eyring flow model is used to represent the plastic shear rate of the deformation of a material, appears to be a proper choice for the description of non-linear viscoelastic behavior of polymers. ...
JJ - Ostatní materiály
- 2005 •
- A
Rok uplatnění
A - Audiovizuální tvorba
Implementation of the Leonov Model into FEM
Summary: The Leonov model, where the Eyring flow model is used to represent the plastic shear rate of the deformation of a material, appears to be a proper choice for the description of non-linear viscoelastic behavior of p...
JJ - Ostatní materiály
- 2005 •
- D
Rok uplatnění
D - Stať ve sborníku
Investigation of Abrupt Contraction Flows of LDPE Melts with Advanced Differential Constitutive Equations
Theoretical and experimental analysis was performed for investigation of stress field generating during the abrupt contraction flow of LDPEs melts. For this purpose, flow visualization cell experiments and viscoelastic FEM analysis employing...
CD - Makromolekulární chemie
- 2006 •
- D
Rok uplatnění
D - Stať ve sborníku
Validation of Leonov model. Mixing and simulation.
Samples of rubber blends were prepared by mixing rubber with various amounts and types of carbon black. True stress -stretch ratio curves were simulated by Leonov model ....
JJ - Ostatní materiály
- 2014 •
- Vsouhrn
Rok uplatnění
Vsouhrn - Souhrnná výzkumná zpráva
Experimental and Numerical Analysis of Nonlinear Behaviour of Polymers
presents application of this material model to the prediction of the behavior of PR100/2+EM100E epoxy resin. The formulation of the generalized Leonov model is brieflyThe Leonov model, where the ...
JI - Kompositní materiály
- 2004 •
- D
Rok uplatnění
D - Stať ve sborníku
Nonlinear viscoelastic model for epoxy matrix based wound or woven composites
of the Leonov model, which is often the choice for the description of nonlinear vsicoelastic material model the paper presents verification of individual material parameters entering the model. Numerical implement...
JI - Kompositní materiály
- 2002 •
- D
Rok uplatnění
D - Stať ve sborníku
An appraisal of differential constitutive equations for polymer melts under various flow situations
Newly proposed Leonov model was compared with modified White-Metzner model and eXtended Pom-Pom model in steady shear and steady uniaxial flow situations for three different polymer melts: LDPE, mLLDPE, and PVB. It...
CD - Makromolekulární chemie
- 2003 •
- D
Rok uplatnění
D - Stať ve sborníku
Differential Viscoelastic Constitutive Equations in Steady Shear and Extensional Flows
A modification of the dissipation term in the Leonov model using relaxation-time-dependent adjustable parameters is proposed to increase its capability of the proposed modified Leonov model are compared with the eX...
CD - Makromolekulární chemie
- 2003 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Viscoelastic Constitutive Equations in Steady Shear and Extensional Flows
In this work, the recently introduced extended Pom-Pom model and the newly proposed modification of the Leonov model are tested in steady shear and uniaxial extensional flows for LDPE, mLLDPE and PVB melts for the purpose o...
CD - Makromolekulární chemie
- 2002 •
- D
Rok uplatnění
D - Stať ve sborníku
Material Parameters of Leonov's Model for Epoxy Matrix
This paper outlines the determination of material parameters of Leonov`s model for the description of the non-linear viscoelastic behavior of epoxy resins. The Eyring flow model is used to represent the plastic shear rate o...
JI - Kompositní materiály
- 2001 •
- D
Rok uplatnění
D - Stať ve sborníku
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