Viscoelastic model with complex rheological behavior (VisCoR)
incremental formulation
Document identifier: oai:DiVA.org:ltu-77777
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10.1080/20550340.2019.1709010Keyword: Engineering and Technology,
Materials Engineering,
Composite Science and Engineering,
Teknik och teknologier,
Materialteknik,
Kompositmaterial och -teknik,
Polymeric Composite Materials,
Polymera kompositmaterialPublication year: 2020Relevant Sustainable Development Goals (SDGs):
The SDG label(s) above have been assigned by OSDG.aiAbstract: A thermo-rheologically complex linear viscoelastic material model, accounting for temperature and degree of cure (DoC), is developed starting with series expansion of the Helmholtz free energy and systematically implementing simplifying assumptions regarding the material behavior. In addition to the temperature and DoC dependent shift factor present in rheologically simple models, the derived novel model contains three cure and temperature dependent functions. The first function is identified as the rubbery modulus. The second is a weight factor to the transient integral term in the model and reflects the current temperature and cure state, whereas the third function is under the sign of the convolution integral, thus affecting the “memory” of the material. An incremental form of this model is presented which, due to improved approximation inside the time increment, has better numerical convergence than most of the similar forms. Parametric analysis is performed simulating stress development in a polymer, geometrically constrained in the mold during curing and cool-down. The importance of using proper viscoelastic model is shown, and the role of parameters in the model is revealed and discussed.
Authors
Sibin Saseendran
Division Materials and Production, RISE SICOMP AB, Piteå, Sweden
Other publications
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Daniel Berglund
Division Materials and Production, RISE SICOMP AB, Piteå, Sweden
Other publications
>>
Janis Varna
Luleå tekniska universitet; Materialvetenskap
Other publications
>>
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identifier: oai:DiVA.org:ltu-77777
datestamp: 2021-04-19T12:48:50Z
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recordCreationDate: 2020-02-19
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http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-77777
10.1080/20550340.2019.1709010
2-s2.0-85077871457
titleInfo:
@attributes:
lang: eng
title: Viscoelastic model with complex rheological behavior (VisCoR)
subTitle: incremental formulation
abstract: A thermo-rheologically complex linear viscoelastic material model accounting for temperature and degree of cure (DoC) is developed starting with series expansion of the Helmholtz free energy and systematically implementing simplifying assumptions regarding the material behavior. In addition to the temperature and DoC dependent shift factor present in rheologically simple models the derived novel model contains three cure and temperature dependent functions. The first function is identified as the rubbery modulus. The second is a weight factor to the transient integral term in the model and reflects the current temperature and cure state whereas the third function is under the sign of the convolution integral thus affecting the “memory” of the material. An incremental form of this model is presented which due to improved approximation inside the time increment has better numerical convergence than most of the similar forms. Parametric analysis is performed simulating stress development in a polymer geometrically constrained in the mold during curing and cool-down. The importance of using proper viscoelastic model is shown and the role of parameters in the model is revealed and discussed.
subject:
@attributes:
lang: eng
authority: uka.se
topic:
Engineering and Technology
Materials Engineering
Composite Science and Engineering
@attributes:
lang: swe
authority: uka.se
topic:
Teknik och teknologier
Materialteknik
Kompositmaterial och -teknik
@attributes:
lang: eng
authority: ltu
topic: Polymeric Composite Materials
genre: Research subject
@attributes:
lang: swe
authority: ltu
topic: Polymera kompositmaterial
genre: Research subject
language:
languageTerm: eng
genre:
publication/journal-article
ref
note:
Published
3
Validerad;2020;Nivå 2;2020-04-06 (johcin)
name:
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type: personal
namePart:
Saseendran
Sibin
role:
roleTerm: aut
affiliation: Division Materials and Production RISE SICOMP AB Piteå Sweden
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type: personal
namePart:
Berglund
Daniel
role:
roleTerm: aut
affiliation: Division Materials and Production RISE SICOMP AB Piteå Sweden
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type: personal
authority: ltu
namePart:
Varna
Janis
role:
roleTerm: aut
affiliation:
Luleå tekniska universitet
Materialvetenskap
nameIdentifier:
janis
0000-0001-9649-8621
originInfo:
dateIssued: 2020
publisher: Taylor & Francis
relatedItem:
@attributes:
type: host
titleInfo:
title: Advanced Manufacturing: Polymer & Composites Science
identifier:
2055-0340
2055-0359
part:
detail:
@attributes:
type: volume
number: 6
@attributes:
type: issue
number: 1
extent:
start: 1
end: 16
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form: print
typeOfResource: text