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Aerospace-grade Advanced Composites with Buckling-densified Aligned Carbon Nanotubes Interlaminar Reinforcement
Name
dfad11e5515349104e970b1a87e2bb261305.pdf
Description
Accepted version
Size
1.39 MB
Format
Adobe PDF
Checksum (MD5)
35312f6f798ffaf245ca1dcaccd35a9b
Author(s)
Ni, Xinchen
Wardle, Brian L.
Date Issued
January 5, 2020
Journal
AIAA Scitech 2020 Forum
Publisher
American Institute of Aeronautics and Astronautics
Citation
Ni, Xinchen and Wardle, Brian L. 2020. "Aerospace-grade Advanced Composites with Buckling-densified Aligned Carbon Nanotubes Interlaminar Reinforcement." AIAA Scitech 2020 Forum, 1 PartF.
Version
Author's final manuscript
Abstract
© 2020, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved. Aligned carbon nanotube (A-CNT) arrays that were densified via patterning and mechanical instability are placed at the resin-rich ply-ply interface in aerospace-grade advanced composite laminates for z-direction reinforcement. The buckled A-CNT arrays display a wavelike folding shape and maintain such a shape after being transferred between the plies. The buckled A-CNT reinforced laminates were tested under short-beam shear (SBS) and double edge-notched tension (DENT) and are found to have a 7% increase in SBS strength and 25% increase in DENT strength, respectively. Both scanning electron microscope imaging and micro-computed tomography reveal that the buckled A-CNT arrays suppress delamination and force damage into the intralaminar region. Furthermore, they introduce multiscale and mixed mode reinforcement mechanisms. The findings demonstrate good potential for using mechanical instability in nanofiber arrays to densify them and tune their shapes, as well as the promising reinforcement effect from buckling-densified A-CNT arrays. Future work to change the pattern (e.g., patterning feature shape and interspacing between features), as well as synchrotron radiation computed tomography-based in situ testing is planned.
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Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
10.2514/6.2020-0156
