Effect of carbon nanofibers on the viscoelastic response of carbon/epoxy composites

Carbon fibre reinforced polymer (CFRP) laminates nano-enhanced with carbon nanofibers (CNFs): 0.75 wt% and 0.5 wt% of epoxies Sicomin and Ebalta, respectively, were manufactured and their static and viscoelastic behaviour analyzed. After 180 min, the bending stress decreases and creep displacement i...

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Bibliographic Details
Published inJournal of reinforced plastics and composites Vol. 43; no. 21-22; pp. 1257 - 1271
Main Authors Santos, P, Silva, Abílio P, Reis, PNB
Format Journal Article
LanguageEnglish
Published London, England SAGE Publications 01.11.2024
Subjects
viscoelastic behaviour
creep
epoxy resin
Carbon fibre reinforced polymer laminates
carbon nanofibers
stress relaxation
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Summary:Carbon fibre reinforced polymer (CFRP) laminates nano-enhanced with carbon nanofibers (CNFs): 0.75 wt% and 0.5 wt% of epoxies Sicomin and Ebalta, respectively, were manufactured and their static and viscoelastic behaviour analyzed. After 180 min, the bending stress decreases and creep displacement increases over time, with Ebalta nano-enhanced resin laminates with CNFs showing the best results. A strong dependence of creep behaviour and stress relaxation is obtained with the applied stress level. The results show that laminates produced with pure Sicomin resin increased creep displacement by 1%, for a bending stress of 200 MPa, and 2 times greater for the bending stress of 700 MPa. The viscoelastic behaviour of CFRP composites nano-enhanced with CNFs was accurately predicted by the Kohlrausch-Williams-Watts (KWW) model and Findley power law.
ISSN:0731-6844
1530-7964
DOI:10.1177/07316844231203787