Internal damage detection of three-dimensional four-step six-directional braided composites based on carbon nanotube thread sensor
In this paper, a method of constructing intelligent three-dimensional braided composite materials is proposed, which is based on the technique of three-dimensional four-step six-directional braiding. The carbon nanotube thread sensors are embedded in the composite materials in axial yarns and six-directional yarns. An internal damage detection system for three-dimensional braided composites is established using carbon nanotube threads. The main features of the resistance matrix obtained by carbon nanotube thread sensors are analysed using singular value decomposition. The exact internal damage position of specimens is calculated through comparison with characteristic values of healthy specimens. Experiments show that the calculated internal damage position of the specimens is consistent with the actual damage position. This study is expected to provide a theoretical basis for the development of structural health monitoring of smart three-dimensional braided composite materials.
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Document Type: Research Article
Publication date: October 1, 2017
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- Official Journal of The British Institute of Non-Destructive Testing - includes original research and devlopment papers, technical and scientific reviews and case studies in the fields of NDT and CM.
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