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Electrical insulation and dielectric properties of aramid fiber reinforced epoxy composites under mechanical stress
Composites science and technology, 2024-08, Vol.255, p.110733, Article 110733
Wang, Yifang
Du, Boxue
Chen, Yun
Lin, Xin
Kong, Xiaoxiao
2024
Volltextzugriff (PDF)
Details
Autor(en) / Beteiligte
Wang, Yifang
Du, Boxue
Chen, Yun
Lin, Xin
Kong, Xiaoxiao
Titel
Electrical insulation and dielectric properties of aramid fiber reinforced epoxy composites under mechanical stress
Ist Teil von
Composites science and technology, 2024-08, Vol.255, p.110733, Article 110733
Ort / Verlag
Elsevier Ltd
Erscheinungsjahr
2024
Quelle
Access via ScienceDirect (Elsevier)
Beschreibungen/Notizen
In this work, an in-situ testing platform that could simultaneously apply high voltage (HV) and mechanical stress has been established. The dielectric properties evolution of aramid fiber reinforced composite (AFRC) under different tensile stresses is investigated systematically. The results show that there is a significant influence on the electrical insulation performance of AFRC, when the applied tensile stress reaches 45 % of the ultimate tensile stress (UTS). Elevated tensile stress will induce interface strain concentration inside composites under this condition, which is prone to cause local damage and defects, consequently enhancing charge accumulation under HV. As the tensile stress continues to increase, it is observed that the absorbed charge around defects increases by 49.4 % under 60 % UTS, accompanied by a discernible decline in the partial discharge inception voltage (PDIV) by 46.9 %. With the increase of absorbed charge, the localized intense electric field is formed, thereby fostering partial discharge and breakdown failure. Therefore, it is important to pay more attention to the evolution of dielectric properties of AFRC under mechanical stress in the design and assessment of aramid-based insulation rods. © 2014 xxxxxxxx. Hosting by Elsevier B.V. All rights reserved. [Display omitted]
Sprache
Englisch
Identifikatoren
ISSN: 0266-3538
eISSN: 1879-1050
DOI: 10.1016/j.compscitech.2024.110733
Titel-ID: cdi_crossref_primary_10_1016_j_compscitech_2024_110733
Format
–
Schlagworte
Aramid fiber reinforced composites
,
Breakdown strength
,
In-situ dielectric measurement
,
Partial discharge
,
Tensile stress
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