Predictive/fitting capabilities of differential constitutive models for polymer melts - reduction of non-linear parameters in the eXtended Pom-Pom model

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985874%3A_____%2F14%3A00428884" target="_blank" >RIV/67985874:_____/14:00428884 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/s00396-014-3308-7" target="_blank" >http://dx.doi.org/10.1007/s00396-014-3308-7</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00396-014-3308-7" target="_blank" >10.1007/s00396-014-3308-7</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Predictive/fitting capabilities of differential constitutive models for polymer melts - reduction of non-linear parameters in the eXtended Pom-Pom model

Popis výsledku v původním jazyce

A phenomenological modification of the eXtended Pom-Pom (XPP) model is proposed with the aim to reduce the number of free nonlinear parameters. The modified XPP model includes three parameters per mode in total (two linear viscoelastic parameters—linear relaxation time λ and shear modulus G, and one nonlinear parameter). The original XPP model contains five parameters (two linear viscoelastic parameters and three nonlinear ones, one nonlinear parameter participates in the second normal stress difference prediction). The predictive/fitting capabilities of the modified model are compared with the Giesekus, eXtended Pom-Pom, and modified Leonov models using various low-density PE materials in steady and transient shear and uniaxial elongational flows. It has been found that the modified model is capable of predicting/fitting the rheological properties, with the exception of the second normal stress difference, for studied LDPE materials with sufficient accuracy, including strain hardening in uniaxial elongational flow.

Název v anglickém jazyce

Predictive/fitting capabilities of differential constitutive models for polymer melts - reduction of non-linear parameters in the eXtended Pom-Pom model

Popis výsledku anglicky

A phenomenological modification of the eXtended Pom-Pom (XPP) model is proposed with the aim to reduce the number of free nonlinear parameters. The modified XPP model includes three parameters per mode in total (two linear viscoelastic parameters—linear relaxation time λ and shear modulus G, and one nonlinear parameter). The original XPP model contains five parameters (two linear viscoelastic parameters and three nonlinear ones, one nonlinear parameter participates in the second normal stress difference prediction). The predictive/fitting capabilities of the modified model are compared with the Giesekus, eXtended Pom-Pom, and modified Leonov models using various low-density PE materials in steady and transient shear and uniaxial elongational flows. It has been found that the modified model is capable of predicting/fitting the rheological properties, with the exception of the second normal stress difference, for studied LDPE materials with sufficient accuracy, including strain hardening in uniaxial elongational flow.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

<a href="/cs/project/GA103%2F09%2F2066" target="_blank" >GA103/09/2066: Analýza a vývoj konstitutivních rovnic pro popis nenewtonských kapalin</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

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

292

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

11

Strana od-do

—

Kód UT WoS článku

000343910100001

EID výsledku v databázi Scopus

2-s2.0-84949097760