The role of the Gordon-Schowalter derivative term in the constitutive models - improved flexibility of the modified XPP model

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985874%3A_____%2F15%3A00438457" target="_blank" >RIV/67985874:_____/15:00438457 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/s00396-015-3498-7" target="_blank" >http://dx.doi.org/10.1007/s00396-015-3498-7</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00396-015-3498-7" target="_blank" >10.1007/s00396-015-3498-7</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The role of the Gordon-Schowalter derivative term in the constitutive models - improved flexibility of the modified XPP model

Popis výsledku v původním jazyce

Constitutive models that complete the set of equations describing the flow of polymer melts should respect objective thermodynamics and stability conditions ensuring their validity in the whole range of possible deformation flow. However, in practice a very good description of flow situations can be achieved with the models not complying with the physical assumptions in all respects. Analogously to the term characterizing yield stress in empirical viscoplastic models, the term represented by the Gordon-Schowalter (GS) derivative in the differential constitutive models contributes to better fitting the experimental data, especially shear thinning. Efficiency of the recently presented modified XPP model (just one non-linear parameter per mode) implementing the GS derivative term (one additional non-affine motion parameter per mode) is improved (documented on LDPE, HDPE, and PVB materials), and a comparison with the exponential PTT and PTT-XPP models (a priori containing the GS derivative

Název v anglickém jazyce

The role of the Gordon-Schowalter derivative term in the constitutive models - improved flexibility of the modified XPP model

Popis výsledku anglicky

Constitutive models that complete the set of equations describing the flow of polymer melts should respect objective thermodynamics and stability conditions ensuring their validity in the whole range of possible deformation flow. However, in practice a very good description of flow situations can be achieved with the models not complying with the physical assumptions in all respects. Analogously to the term characterizing yield stress in empirical viscoplastic models, the term represented by the Gordon-Schowalter (GS) derivative in the differential constitutive models contributes to better fitting the experimental data, especially shear thinning. Efficiency of the recently presented modified XPP model (just one non-linear parameter per mode) implementing the GS derivative term (one additional non-affine motion parameter per mode) is improved (documented on LDPE, HDPE, and PVB materials), and a comparison with the exponential PTT and PTT-XPP models (a priori containing the GS derivative

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BK - Mechanika tekutin

OECD FORD obor

—

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Colloid and Polymer Science

ISSN

0303-402X

e-ISSN

—

Svazek periodika

4

Číslo periodika v rámci svazku

293

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

10

Strana od-do

—

Kód UT WoS článku

000352074200023

EID výsledku v databázi Scopus

2-s2.0-84939947752