Parameter identification and validation of shape-memory polymers within the framework of finite strain viscoelasticity Full article
| Journal |
Materials
ISSN: 1996-1944 |
||||||
|---|---|---|---|---|---|---|---|
| Output data | Year: 2021, Number: 14, Article number : 2049, Pages count : 24 DOI: 10.3390/ma14082049 | ||||||
| Tags | finite viscoelasticity; parameter identification; modeling; functional materials; shape memory effect; shape memory polymer; physical aging; swelling | ||||||
| Authors |
|
||||||
| Affiliations |
|
Abstract:
Shape-Memory Polymers (SMPs) can be stretched to large deformations and recover
induced strains when exposed to an appropriate stimulus, such as heat. This emerging class of
functional polymers has attracted much interest and found applications in medicine and engineering.
Nevertheless, prior to any application, their physical and mechanical properties must be thoroughly
studied and understood in order to make predictions or to design structures thereof. In this contribution, the viscoelastic behavior of a polyether-based polyurethane (Estane) and its rate- and
temperature-dependent behavior have been studied experimentally and by the mean of simulations.
The model-inherent material parameters are identified with the assumption of the thermo-rheological
complexity. Here, the numerical results of uni-axial stress relaxations were compared with the associated experiments in conjucation with the Levenberg-Marquard optimization method to determine
the parameters of the Prony equation. The ability of the model to simulate the thermo-mechanical
properties of Estane was evaluated by data-rich experimental observations on tension and torsion in
various temperature ranges. Heterogeneous tests are included into the experimental program to
cover a broader spectrum of loading scenarios.
Cite:
Ghobadi E.
, Shutov A.
, Steeb H.
Parameter identification and validation of shape-memory polymers within the framework of finite strain viscoelasticity
Materials. 2021. N14. 2049 :1-24. DOI: 10.3390/ma14082049 WOS Scopus РИНЦ OpenAlex
Parameter identification and validation of shape-memory polymers within the framework of finite strain viscoelasticity
Materials. 2021. N14. 2049 :1-24. DOI: 10.3390/ma14082049 WOS Scopus РИНЦ OpenAlex
Dates:
| Submitted: | Mar 7, 2021 |
| Accepted: | Apr 1, 2021 |
| Published print: | Apr 19, 2021 |
Identifiers:
| Web of science: | WOS:000644525000001 |
| Scopus: | 2-s2.0-85105067525 |
| Elibrary: | 46034307 |
| OpenAlex: | W3156575187 |