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Time, temperature and water aging failure envelope of thermoset polymers
Citation Link: https://doi.org/10.15480/882.4973
Publikationstyp
Journal Article
Date Issued
2023-01-15
Sprache
English
TORE-DOI
Journal
Volume
118
Article Number
107901
Citation
Polymer Testing 118: 107901 (2023-01-15)
Publisher DOI
Scopus ID
Publisher
Elsevier Science
Epoxies and epoxy-based fiber reinforced polymers (FRP) are significantly affected by environmental impacts during their service life. Exposures to water, humidity, temperature and UV radiation are known to substantially influence the (thermo-) mechanical properties and durability of the materials. Design-relevant characteristics like strength, stiffness, or the glass transition temperature change with time. Therefore, expensive test campaigns are often necessary in advance of a structural design. Prediction models based on physical relations or phenomenological observations are typically required to reduce costs and increase reliability. Consequently, a combined methodology for fast prediction of long-term properties and accelerated aging purposes is presented in this work for a common DGEBA-based epoxy. Therefore, master curves are obtained by creep and constant-strain-rate tests under temperature and moisture impact. A combined time–temperature–water superposition and the Larson–Miller parametrization demonstrate that time-saving CSR tests and modeling can replace long-lasting creep testing. Resulting, the presented methodology allows to determine a polymer's entire (environmental) failure envelope in a relatively short time and with low testing effort.
Subjects
Accelerated testing
Composite
Creep
Strength
Thermo-mechanical behavior
DDC Class
530: Physik
540: Chemie
Funding Organisations
European Regional Development Fund
Publication version
publishedVersion
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Format
Adobe PDF