| Download | - View accepted manuscript: Fibre optic sensing for thermal stress measurement (PDF, 857 KiB)
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| Author | Search for: Zhang, Merrina1; Search for: Roghani, Alireza1; Search for: Hoult, Neil; Search for: Barker, Christian; Search for: Charbachi, Paul |
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| Affiliation | - National Research Council of Canada. Automotive and Surface Transportation
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| Format | Text, Article |
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| Conference | AREMA 2020 Annual Conference & Expo, September 13 – 16, 2020, Dallas, Texas, USA |
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| Abstract | Continuously welded rail (CWR) is one of the most common railway track constructions. However, large thermal stresses can build up in CWR due to the elimination of expansion gaps leading to rail breaks in cold temperatures and rail buckling in hot temperatures. When rail temperatures are greater than the rail neutral temperature (RNT), compressive stress is induced, while temperatures below RNT induce tensile stress. Technical reviews completed by National Research Council Canada identified a gap in knowledge in quantifying the level of stress being experienced by rails in CWR. Fibre optic sensing was identified as a promising method to measure and monitor long lengths of track in order to better understand thermal stresses in-situ. This research is focused on evaluating the suitability of a select number of fibre optic sensing systems for thermal stress measurement by evaluating these systems, both analysers and optical sensing fibres, within a laboratory setting. This paper provides a brief background on the use of fibre optic sensing before presenting the experimental campaign, including tests conducted on rail segments instrumented with a variety of fibre optic sensors under load as well as when exposed to temperature changes. |
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| Publication date | 2020-09-16 |
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| Publisher | American Railway Engineering and Maintenance-of-Way Association |
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| Language | English |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | a8a33d4d-d0ba-4b89-ad69-94ce8c2dfaa5 |
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| Record created | 2020-11-04 |
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| Record modified | 2020-11-04 |
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