Mechanical behavior of aeronautical composites containing self-healing microcapsules
International Journal of Structural Integrity
ISSN: 1757-9864
Article publication date: 3 December 2018
Abstract
Purpose
Over the last decades, self-healing materials based on polymers are attracting increasing interest due to their potential for detecting and “autonomically” healing damage. The use of embedded self-healing microcapsules represents one of the most popular self-healing concepts. Yet, extensive investigations are still needed to convince on the efficiency of the above concept. The paper aims to discuss these issues.
Design/methodology/approach
In the present work, the effect of embedded self-healing microcapsules on the ILSS behavior of carbon fiber reinforced composite materials has been studied. Moreover, the self-healing efficiency has been assessed. The results of the mechanical tests were discussed supported by scanning electron microscope (SEM) as well as by Attenuated Total Reflection–Fourier-transform infrared spectroscopy (ATR–FTIR) analyses.
Findings
The results indicate a general trend of a degraded mechanical behavior of the enhanced materials, as the microcapsules exhibit a non-uniform dispersion and form agglomerations which act as internal defects. A remarkable value of the self-healing efficiency has been found for materials with limited damage, e.g. matrix micro-cracks. However, for significant damage, in terms of large matrix cracks and delaminations as well as fiber breakages, the self-healing efficiency is limited.
Originality/value
The results obtained by SEM analysis as well as by ATR–FTIR spectroscopy constitute a strong indication that the self-healing mechanism has been activated. However, further investigation should be conducted in order to provide definite evidence.
Keywords
Acknowledgements
This work was funded by the IASS project, Grant Agreement No. 313978 of the commission of the European Communities, European Union’s Seventh Framework Programme for research, technological development and demonstration.
Citation
Polydoropoulou, P., Katsiropoulos, C.V., Loukopoulos, A. and Pantelakis, S. (2018), "Mechanical behavior of aeronautical composites containing self-healing microcapsules", International Journal of Structural Integrity, Vol. 9 No. 6, pp. 753-767. https://doi.org/10.1108/IJSI-12-2017-0075
Publisher
:Emerald Publishing Limited
Copyright © 2018, Emerald Publishing Limited