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Parameter identification and validation of shape-memory polymers within the framework of finite strain viscoelasticity Научная публикация

Журнал Materials
ISSN: 1996-1944
Вых. Данные Год: 2021, Номер: 14, Номер статьи : 2049, Страниц : 24 DOI: 10.3390/ma14082049
Ключевые слова finite viscoelasticity; parameter identification; modeling; functional materials; shape memory effect; shape memory polymer; physical aging; swelling
Авторы Ghobadi E. 1 , Shutov A. 2 , Steeb H. 1,3
Организации
1 Institute of Applied Mechanics, University of Stuttgart
2 Lavrentyev Institute of Hydrodynamics,
3 Stuttgart Center for Simulation Science, University of Stuttgart

Реферат: 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.
Библиографическая ссылка: 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
Даты:
Поступила в редакцию: 7 мар. 2021 г.
Принята к публикации: 1 апр. 2021 г.
Опубликована в печати: 19 апр. 2021 г.
Идентификаторы БД:
Web of science: WOS:000644525000001
Scopus: 2-s2.0-85105067525
РИНЦ: 46034307
OpenAlex: W3156575187
Цитирование в БД:
БД Цитирований
Scopus 12
OpenAlex 13
РИНЦ 10
Web of science 12
Альметрики: