A quasi-linear viscoelastic rheological model for thermoplastics and resins

• Autorzy: Suchocki C.

Warianty tytułu

PL

Model reologiczny quasi-liniowej lepkosprężystości dla termoplastów i żywic

• Języki publikacji: EN

Abstrakty

EN

A new rheological model for polymeric materials has been proposed. The model is based on the concept of utilizing the Knowles stored-energy potential within the framework of quasi-linear viscoelasticity theory. The quasi-linear viscoelastic constitutive equation in its general form has been formulated using the formalism of the internal state variables. The developed constitutive equation allows for capturing the nonlinear-viscoelastic behavior of many polymeric materials such as thermoplastics or resins. The model has been implemented into a FE system. An application of the developed constitutive equation to modeling of the short-term, dissipative response of polyethylene has been presented.

PL

Zaproponowano nowy model reologiczny dla materiałów polimerowych. Model bazuje na koncepcji wykorzystania funkcji potencjalnej energii akumulowanej typu Knowlesa w ramach teorii quasi-liniowej lepkosprężystości. Równanie konstytutywne quasi-liniowej lepkosprężystości w ogólnej postaci sformułowano, wykorzystując formalizm wewnętrznych zmiennych stanu. Opracowane równanie konstytutywne pozwala na opis nieliniowo lepkosprężystych własności wielu materiałów polimerowych, takich jak termoplasty czy żywice. Model wprowadzono do systemu MES. W pracy zaprezentowano zastosowanie opracowanego równania konstytutywnego do modelowania krótkookresowej i dyssypatywnej odpowiedzi polietylenu.

Słowa kluczowe

EN

polymers; rheology; constitutive equation; quasi-linear viscoelasticity; finite element method

• Wydawca: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
• Czasopismo: Journal of Theoretical and Applied Mechanics
• Rocznik: 2013
• Tom: Vol. 51 nr 1
• Strony: 117--129
• Opis fizyczny: Bibliogr. 19 poz., rys., tab.

Twórcy

autor

Suchocki C.

• Warsaw University of Technology, Institute of Mechanics and Printing, Warsaw, Poland

Bibliografia

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