Research on interlayer properties of short fiber intercalated carbon fiber/epoxy composites

ZHENG Hao; LI Yan; TU Haoyun

doi:10.13801/j.cnki.fhclxb.20211025.003

Volume 39 Issue 8

Aug. 2022

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ZHENG Hao, LI Yan, TU Haoyun. Research on interlayer properties of short fiber intercalated carbon fiber/epoxy composites[J]. Acta Materiae Compositae Sinica, 2022, 39(8): 3674-3683. doi: 10.13801/j.cnki.fhclxb.20211025.003

Citation:

ZHENG Hao, LI Yan, TU Haoyun. Research on interlayer properties of short fiber intercalated carbon fiber/epoxy composites[J]. Acta Materiae Compositae Sinica, 2022, 39(8): 3674-3683. doi: 10.13801/j.cnki.fhclxb.20211025.003

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Research on interlayer properties of short fiber intercalated carbon fiber/epoxy composites

doi: 10.13801/j.cnki.fhclxb.20211025.003

School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China

Received Date: 2021-08-20
Accepted Date: 2021-10-19
Rev Recd Date: 2021-09-26

Available Online: 2021-10-26

Publish Date: 2022-08-31

Abstract

Abstract

Carbon fiber/epoxy composites had been widely used in aerospace, rail transit, automobile and other fields because of their high specific strength, specific modulus and good fatigue resistance. However, as one of the main structural forms of carbon fiber/epoxy composites, the laminate structure had the weakest interlayer performance due to the lack of fiber in the thickness direction, which was prone to delamination failure and affects the bearing performance of the structure. Short fiber intercalation toughening was an effective means to improve the interlaminar properties of carbon fiber/epoxy composites. In recent years, scholars at home and abroad had carried out a lot of relevant research work, but there was still a lack of systematic research on short fiber intercalation toughening. In this work, carbon fiber, flax fiber and Kevlar fiber were selected as intercalated short fibers. The effects of short fiber types, intercalation layer density and fiber length on the interlaminar toughening effect of carbon fiber/epoxy composites were systematically analyzed and discussed. The results show that for different short fiber intercalations, the interlaminar fracture toughness of composites increases first and then decreases with the increase of short fiber length and intercalation layer density. On this basis, the toughening mechanisms of different kinds of fibers are revealed. Fiber bridging, change of crack propagation path, multi-layer failure and longitudinal tearing of fibers are helpful to improve the interlaminar fracture toughness of composites. The research results lay a foundation for the structural design of short fiber intercalated toughened composites.
- carbon fiber composites,
- fracture toughness,
- interlayer toughening,
- short fiber intercalation,
- fiber bridging,
- mechanical property
Long Abstrsct
Innovation Points

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References(28)

References

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