On the application of strong thermoplastic–thermoset interactions for developing advanced aerospace-composite joints

Journal article (2023)

Authors

D. Quan Shandong University
Yannan Ma Shandong University
Dongsheng Yue Shandong University
Jiaming Liu Shandong University
Jun Xing Qingdao University of Science and Technology
Mingming Zhang Qingdao University of Science and Technology
R.C. Alderliesten Structural Integrity & Composites - Aerospace Engineering
Guoqun Zhao Shandong University
Research Group
Structural Integrity & Composites (Aerospace Engineering) (TU Delft)
Copyright: © 2023 D. Quan, Yannan Ma, Dongsheng Yue, Jiaming Liu, Jun Xing, Mingming Zhang, R.C. Alderliesten, Guoqun Zhao
DOI: https://doi.org/10.1016/j.tws.2023.110671
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Published Date

2023

Language

English

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Faculty

Aerospace Engineering

Department

Aerospace Structures & Materials

Research Group

Structural Integrity & Composites

Abstract

In this study, an aerospace thermosetting composite was co-curing joined by Polyether-ether-ketone (PEEK) and Polyethylenimine (PEI) films, with an aim of developing advanced composite joints. The semi-crystalline PEEK films were surface activated upon a UV-irradiation technique to obtain a strong film–composite interface, while the amorphous PEI films could be directly used. The fracture behaviour of the composite joints was evaluated and compared with benchmark aerospace adhesive joints. The experimental results proved remarkable mode-I and mode-II fracture resistance of the PEEK co-cured joints at 22 °C and 130 °C, while the PEI co-cured joints exhibited excellent mode-I fracture resistance at 22 °C and mode-II fracture resistance in both testing temperature cases. Extensive elongation, tearing and fracture of the PEEK/PEI plastics were proved to be the main mechanisms for toughness enhancement. Overall, this work had successfully demonstrated the effectiveness of developing advanced composite joints via a co-curing process using high-performance thermoplastic films.

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