Journal
COMPOSITES PART B-ENGINEERING
Volume 163, Issue -, Pages 690-701Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2019.01.050
Keywords
Fabrics/textiles; Carbon fibre; Fracture; Impact behaviour
Funding
- Nano Material Technology Development Program through the National Research Foundation of Korea - Ministry of Science, ICT and Future Planning [NRF-2016M3A7B4910532]
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The aim of this study is to evaluate the performance of smart grid fabrics (SGF) comprising carbon dry fabric and a number of polyvinylidene fluoride ribbons with piezoelectric characteristics. Smart grid fabrics embedding composite structures can perform real-time structural integrity diagnoses under service conditions. Sensitivity checks of SGF sensors embedded in carbon/epoxy composite laminates under a drop-weight impact loading were performed. Finally, frequency analysis techniques, such as short-time Fourier transform and discrete wavelet transform, were used to correlate the frequency components of the output signals with the corresponding material failure modes of the composite laminate. Based on the results from a series of experimental tests, the feasibility of constructing smart composite structures using SGFs was verified.
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