Title
Experimental and theoretical study on residual ultimate strength after impact of CF/PEEK-titanium hybrid laminates with nano-interfacial enhancement
Author
Ji, C. (TU Delft Structural Integrity & Composites; Harbin Institute of Technology (Shenzen))
Hu, Jiqiang (Harbin Institute of Technology)
Sadighi, M. (TU Delft Structural Integrity & Composites)
Alderliesten, R.C. (TU Delft Structural Integrity & Composites) 
Wang, Bing (Harbin Institute of Technology)
Sun, Yuguo (Harbin Institute of Technology)
Date
2022
Abstract
Fiber metal laminates (FMLs) provide a reliable approach for achieving lightweight in high-speed aerospace vehicles. However, the weak interfacial properties between metals and composites could significantly affect the deformation and failure modes of FMLs. In this paper, the low-velocity impact responses and damage mechanisms of CF/PEEK-Ti hybrid laminates with nano-interfacial enhancement by multi-walled carbon nanotubes (CNTs) were characterized and analyzed. The post-impact residual tensile strengths (RTS) were investigated experimentally using quasi-static uniaxial tests combined with digital image correlation, and were evaluated theoretically by developing an analytical prediction model that considers the internal thermal stress and dent geometry. Results show that the initial delamination thresholds of force and displacement during impact can be effectively increased via interfacial enhancement of CNT network. By using a 5% decrease in RTS retention rate as a criterion for damage tolerance, a significant strength decrease starts to appear at 3 J for the sandblasted-only laminates, which is improved to 10 J for the laminates with nano-interfacial enhancement. The proposed unified constitutive model can yield an acceptable prediction for RTS and failure strain of the hybrid laminate after impact, providing a guidance for the structural design and engineering applications of FMLs.
To reference this document use:
http://resolver.tudelft.nl/uuid:d5560d38-7c94-4b92-9263-37da4d931367
DOI
https://doi.org/10.1016/j.compscitech.2022.109871
Embargo date
2023-06-01
ISSN
0266-3538
Source
Composites Science and Technology, 232
Bibliographical note
Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
Part of collection
Institutional Repository
Document type
journal article
Rights
© 2022 C. Ji, Jiqiang Hu, M. Sadighi, R.C. Alderliesten, Bing Wang, Yuguo Sun