Investigation of small electrical resistance of NiTi shape memory alloys in the application of damage detection
Conference proceedings article
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Publication Details
Author list: Chatwaranon C., Wongsa S., Buasri T., Khantachawana A.
Publisher: Hindawi
Publication year: 2013
ISBN: 9781479905454
ISSN: 0146-9428
eISSN: 1745-4557
Languages: English-Great Britain (EN-GB)
Abstract
Applications of shape memory alloys (SMAs) as damage sensors have been widely studied in structural health monitoring. Monitoring a significant change in electrical resistance of SMAs can indicate the phase transformation of SMAs. The possibility of using the electrical resistance of SMAs as an indicator of damage in the materials has been investigated. We continuously monitored the behaviour of electrical resistance, as well as the strain, under the tensile test which is used as the simulated crack propagation. Wavelet transform were used to extract the trend of the noisy electrical resistance raw data, measured by the four-point-probe technique. We determined that the electrical resistance variation of the SMA wire is correlated with the strain and can possibly be used in damage detection stage. ฉ 2013 IEEE.
Keywords
Discrete Wavelet Transform, Electrical Monitoring, Shape Memory Alloys, Trend Extraction
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