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Dynamic mechanical analysis of PA 6 under hydrothermal influences and viscoelastic material modeling

Kehrer, Loredana 1; Keursten, Johannes 1; Hirschberg, Valerian 2; Böhlke, Thomas ORCID iD icon 1
1 Institut für Technische Mechanik (ITM), Karlsruher Institut für Technologie (KIT)
2 Institut für Technische Chemie und Polymerchemie (ITCP), Karlsruher Institut für Technologie (KIT)

Abstract:

Polyamides serve as matrix material for fiber reinforced composites and are widely applied in many different engineering applications. In this context, they are exposed to various environmental influences ranging from temperature to humidity. Thus, the influence of these environmental conditions on the mechanical behavior and the associated implications on the performance of the material is of utmost importance. In this work, the thermoviscoelastic behavior of polyamide 6 (PA 6) for two equilibrium moisture contents is investigated. To this end, dynamic mechanical analysis tests with and without humidity control of the environmental chamber were performed. In terms of relaxation tests, the experimental results reveal drying effects and increased diffusion activities when the sample’s equilibrium moisture content differs from the ambient humidity level within the testing chamber. Temperature-frequency tests quantify the humidity-induced shift of the glass transition temperature. The linear generalized Maxwell model (GMM) and time-temperature superposition are used to analyze the hydrothermal effects on the linear viscoelastic material properties and the onset of mechanical nonlinearity. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000156219
Veröffentlicht am 24.02.2023
Originalveröffentlichung
DOI: 10.1177/08927057231155864
Scopus
Zitationen: 4
Web of Science
Zitationen: 2
Dimensions
Zitationen: 3
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Technische Chemie und Polymerchemie (ITCP)
Institut für Technische Mechanik (ITM)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2023
Sprache Englisch
Identifikator ISSN: 0892-7057, 1530-7980
KITopen-ID: 1000156219
Erschienen in Journal of Thermoplastic Composite Materials
Verlag SAGE Publications
Vorab online veröffentlicht am 08.02.2023
Schlagwörter Time-temperature superposition, viscoelasticity, polyamide 6, humidity influence, DMA, generalized Maxwell model
Nachgewiesen in Dimensions
Web of Science
Scopus
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