Aligned Carbon Nanotube Reinforcement of Aerospace Carbon Fiber Composites: Substructural Strength Evaluation for Aerostructure Applications
Name
rguzman_SDM2012_SAAB_rg_sw_blw_rg2_blw_rg2_blw4.pdf
Description
Conference Proccedings. It has been just submitted, to be published this year
Size
1.39 MB
Format
Adobe PDF
Checksum (MD5)
35312f6f798ffaf245ca1dcaccd35a9b
Author(s)
Guzman de Villoria, Roberto
Ydrefors, L.
Hallander, P.
Ishiguro, Kyoko
Nordin, P.
Wardle, Brian L.
Date Issued
April 2012
Journal
53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2012
Publisher
American Institute of Aeronautics and Astronautics
Citation
Guzman de Villoria, R. et al. "Aligned Carbon Nanotube Reinforcement of Aerospace Carbon Fiber Composites: Substructural Strength Evaluation for Aerostructure Applications." in Proceedings of the 53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, April 2012, Honolulu, Hawaii.
Version
Author's final manuscript
Abstract
Vertically aligned carbon nanotubes (VACNTs) are placed between all plies in an
aerospace carbon fiber reinforced plastic laminate (unidirectional plies, [(0/90/±45)2]s) to reinforce the interlaminar region in the z-direction. Significant improvement in Mode I and II interlaminar toughness have been observed previously. In this work, several substructural in-plane strength tests relevant to aerostructures were undertaken: bolt/tension-bearing, open hole compression, and L-shape laminate bending. Improvements are observed for the nanostitched samples: critical bearing strength by 30%, open-hole compression ultimate strength by 10%, and L-shape laminate energy (via increased deflection) of 40%. The mechanism of reinforcement is not compliant interlayer creation, but rather is a fiberstitching mechanism, as no increase in interlayer thickness occurs with the nanostitches. Unlike traditional (large-fiber/tow/pin) stitching or z-pinning techniques that damage inplane fibers and reduce laminate in-plane strengths, the nano-scale CNT-based ‘stitches’ improve in-plane strength, demonstrating the potential of such an architecture for aerospace structural applications. The quality of VACNT transfer to the prepreg laminates has not been optimized and therefore the noted enhancement to strength may be considered conservative. Ongoing work has been undertaken to both improve VACNT transfer and expand the data set.
Description
https://www.aiaa.org/ProceedingsDetail.aspx?id=5776
MIT Department
Massachusetts Institute of Technology. Department of Aeronautics and Astronautics
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