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Proceedings 2018, 2(8), 490; https://doi.org/10.3390/ICEM18-05386

Early-Stage Damage Detection in Advanced Multifunctional Aerospace Composites Using Embedded Carbon Nanotubes and Flocked Carbon Fibers

1
The U.S. Army Research Laboratory, Aberdeen Proving Ground, MD 21005, USA
2
Department of Mechanical Engineering, University of Massachusetts Dartmouth, North Dartmouth, MA 02747, USA
Presented at the 18th International Conference on Experimental Mechanics, Brussels, Belgium, 1–5 July 2018.
*
Author to whom correspondence should be addressed.
Published: 24 June 2018
PDF [308 KB, uploaded 24 July 2018]

Abstract

Early-stage damage detection could provide better reliability and performance and a longer lifetime of materials while reducing maintenance time of a variety of structures and systems. We investigate the early-stage damage formation and damage evolution in advanced multi-functional laminated aerospace composites embedded with a very small amount of carbon nanotubes (CNTs) in the matrix material and short carbon fibers along the Z-direction to reinforce the interlaminar interfaces. The three-dimensional (3-D) conductive network formed by the CNTs and the flocked carbon fibers allows for sensitive in-situ damage detection in materials in addition to providing improved mechanical properties such as superior fracture toughness for damage tolerance. We optimize several parameters such as fiber length, diameter, and density to generate an effective 3-D electrical conductive network, and characterize the responses of these composites under mechanical loading to investigate damage formation and evolution, advancing science and technology towards superior damage-tolerant and zero-maintenance structural materials.
Keywords: carbon nanotubes; flocked carbon fibers; damage sensing; aerospace composites; flocking; CNT; electrical resistivity; 3-D conductive network; in-situ damage carbon nanotubes; flocked carbon fibers; damage sensing; aerospace composites; flocking; CNT; electrical resistivity; 3-D conductive network; in-situ damage
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Nataraj, L.; Coatney, M.; Hall, A.; Haile, M.; Sherman, R.; O’Donnell, J.; Chalivendra, V. Early-Stage Damage Detection in Advanced Multifunctional Aerospace Composites Using Embedded Carbon Nanotubes and Flocked Carbon Fibers. Proceedings 2018, 2, 490.

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