Reference : A new variant of the Burgers model describing the flow of uncured styrene-butadiene rubber
E-prints/Working papers : First made available on ORBilu
Engineering, computing & technology : Chemical engineering
Engineering, computing & technology : Materials science & engineering
Computational Sciences; Physics and Materials Science
http://hdl.handle.net/10993/42821
A new variant of the Burgers model describing the flow of uncured styrene-butadiene rubber
English
Řehoř, Martin []
Gansen, Alex mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Sill, Clemens []
Polińska, Patrycja []
Westermann, Stephan []
Dheur, Jean []
Baller, Jörg mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Hale, Jack mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
2020
No
[en] Burgers model ; rate-type fluid model ; viscoelasticity ; styrene-butadiene rubber ; experiment fitting
[en] Uncured styrene-butadiene rubber (SBR) can be modelled as a viscoelastic material with at least two different relaxation mechanisms. In this paper we compare the classical Burgers model with additional dissipation, a generalised Burgers model originally developed to describe the response of asphalt binders, and a newly derived Burgers model combining the strengths of the two existing models. We select the model that best fits the experimental data obtained from a modified stress relaxation experiment in the torsional configuration of the plate-plate rheometer. The optimisation of the five model parameters for each model is achieved by minimising the weighted least-squares distance between experimental observations and the computer model output using a tree-structured Parzen estimator algorithm to find an initial guess, followed by further optimisation using the Nelder-Mead simplex algorithm. The results show that our new model is the most suitable variant to describe the observed behavior of SBR in the given regime. The predictive capabilities of the three models are further examined in changed experimental and numerical configurations. Full data and code to produce the figures in this article are included as supplementary material.
Fonds National de la Recherche - FnR
Researchers ; Professionals
http://hdl.handle.net/10993/42821
https://doi.org/10.6084/m9.figshare.7993205.v1
FnR ; FNR11617214 > Jörg Baller > SLIPEX > Incorporation of SLIP boundary conditions in EXtruder flow channel modelling > 01/10/2017 > 30/09/2019 > 2017

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