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The effect of different numerical approaches on the accuracy of calculating relaxation spectra for polysaccharides
ID Nikonov, Anatolij (Author), ID Florjančič, Urška (Author)

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Abstract
For polymeric materials, the relaxation spectrum contains complete information about the time-dependent part of the material response. The contribution of different numerical schemes, i.e., different methods of reconstructing the dynamic relaxation modulus, to the accuracy of the approximation by calculating the corresponding relaxation spectra is investigated by analysing experimental data for four types of polysaccharides. It was found that there is no unique mathematical approach for the calculation of relaxation spectra that ensures a satisfactory approximation of the experimentally determined dynamic moduli for the selected types of polymeric materials. It is recommended to combine different numerical methods in parallel to achieve a reasonable approximation of the material functions.

Language:English
Keywords:polysaccharide, rheology, viscoelastic properties, relaxation spectrum, mathematical modelling
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Publication status:Published
Publication version:Version of Record
Year:2023
Number of pages:Str. 91-100
Numbering:Vol. 70
PID:20.500.12556/RUL-144715 This link opens in a new window
UDC:539.3:519.6
ISSN on article:1318-0207
DOI:10.17344/acsi.2023.7861 This link opens in a new window
COBISS.SI-ID:144548099 This link opens in a new window
Publication date in RUL:09.03.2023
Views:376
Downloads:47
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Record is a part of a journal

Title:Acta chimica slovenica
Shortened title:Acta chim. slov.
Publisher:Slovensko kemijsko društvo, =Slovenian Chemical Society
ISSN:1318-0207
COBISS.SI-ID:14086149 This link opens in a new window

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

Language:Slovenian
Abstract:
Pri polimernih materialih relaksacijski spekter vsebuje popolne informacije o časovno odvisnem delu odziva materiala. Z analizo eksperimentalnih podatkov za štiri vrste polisaharidov raziskujemo prispevek različnih numeričnih shem, tj. različnih metod rekonstrukcije dinamičnega relaksacijskega modula, k natančnosti aproksimacije z izračunom pripadajočih relaksacijskih spektrov. Ugotovljeno je bilo, da ne obstaja edinstven matematični pristop za izračun relaksacijskih spektrov, ki bi zagotavljal zadovoljivo aproksimacijo eksperimentalno določenih dinamičnih modulov za izbrane vrste polimernih materialov. Priporočljivo je vzporedno kombinirati različne numerične metode, da dosežemo razumno aproksimacijo funkcij materiala.

Keywords:polisaharidi, reologija, viskoelastične lastnosti, relaksacijski spekter, matematično modeliranje

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