ǂThe ǂeffect of different numerical approaches on the accuracy of calculating relaxation spectra for polysaccharides
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.
Keywords
polysaccharide;rheology;viscoelastic properties;relaxation spectrum;mathematical modelling;
Data
| Language: | English |
|---|---|
| Year of publishing: | 2023 |
| Typology: | 1.01 - Original Scientific Article |
| Organization: | UL FS - Faculty of Mechanical Engineering |
| UDC: | 539.3:519.6 |
| COBISS: |
144548099
|
| ISSN: | 1318-0207 |
| Views: | 25 |
| Downloads: | 2 |
| Average score: | 0 (0 votes) |
| Metadata: |
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Other data
| Secondary language: | Slovenian |
|---|---|
| Secondary 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. |
| Secondary keywords: | polisaharidi;reologija;viskoelastične lastnosti;relaksacijski spekter;matematično modeliranje; |
| Type (COBISS): | Article |
| Pages: | str. 91-100 |
| Issue: | ǂVol. ǂ70 |
| Chronology: | 2023 |
| DOI: | 10.17344/acsi.2023.7861 |
| ID: | 18209033 |
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