Damage characterization of 3D braided composites using carbon nanotube-based in situ sensing

Title
Damage characterization of 3D braided composites using carbon nanotube-based in situ sensing
Author(s)
이준석김경주[김경주]유웅렬[유웅렬]리민가오[리민가오]에렉토스텐슨[에렉토스텐슨]쭈웨이초우[쭈웨이초우]변준형[변준형]
Keywords
TEXTILE COMPOSITES; MECHANISMS; FAILURE; NETWORKS; TENSION; STRAIN
Issue Date
201006
Publisher
ELSEVIER SCI LTD
Citation
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING, v.41, no.10, pp.1531 - 1537
Abstract
Carbon nanotubes (CNTs) were used as an in situ sensor to detect the initiation of micro-cracks and their accumulation in fiber-reinforced polymer composites. The breakage of the electrically conductive networks formed by CNTs throughout the polymer matrix when dispersed in composites enables the micro-cracks to be sensed. This methodology was applied to three-dimensional (3D) braided composites with the aim of investigating the feasibility of detecting their matrix failure and analyzing their damage behavior. Tensile specimens were prepared using 3D braided ultra-high molecular weight polyethylene (UHMWPE) preforms and vinyl ester containing multi-walled CNTs (0.5 wt%) via vacuum-assisted resin transfer molding (VARTM). The electrical resistance of the composites was then measured during tensile testing, while their internal structures were analyzed using X-ray computer tomography (CT), demonstrating that the CNTs dispersed in the matrix enable micro-cracks to be sensed and the damage modes of the 3D braided composites to be analyzed. Finally, four critical strain levels that can classify the damage modes were identified from the change of the electrical resistance of the 3D braided composites. (c) 2010 Elsevier Ltd. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/22329http://dx.doi.org/10.1016/j.compositesa.2010.06.016
ISSN
1359-835X
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공과대학 > 융합섬유공학과 > Articles
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