Surface Crack Detection in Precasted Slab Track in High-Speed Rail via Infrared Thermography
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School of Urban Rail Transportation, Shanghai University of Engineering Science, Shanghai 201620, China
2
College of Urban Transportation and Logistics, Shenzhen Technology University, Shenzhen 518118, China
3
State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi’an Jiaotong University, Xi’an 710049, China
*
Author to whom correspondence should be addressed.
Materials 2020, 13(21), 4837; https://doi.org/10.3390/ma13214837
Received: 10 October 2020
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Revised: 24 October 2020
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Accepted: 26 October 2020
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Published: 29 October 2020
(This article belongs to the Section Smart Materials)
The surface crack of ballastless track slab can seriously reduce the serviceability and durability of high-speed railway (HSR). Aiming at accurately and efficiently detecting the slab cracks, this research proposes an infrared thermography (IRT)-based method for the surface crack, which is the most serious and common crack type in track slab. A three dimensional finite element (FE) model of IRT detection of concrete slab with surface cracks is established. The relation between the width of detectable cracks and the ambient temperature can be thereby obtained by inputting the measured thermodynamic parameters in the model. Parametric study shows that with ambient temperature higher than 15 °C, cracks with a width of no less than 0.2 mm can be well detected. Scale model test and field test are conducted, IRT method can effectively locate the slab surface cracks with width as small as 0.14 mm when ambient temperature is no less than 20 °C.
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Keywords:
infrared thermography (IRT); high-speed railway (HSR) track slab; surface crack; finite element (FE) simulation; field test
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MDPI and ACS Style
Li, Z.-W.; Liu, X.-Z.; Lu, H.-Y.; He, Y.-L.; Zhou, Y. Surface Crack Detection in Precasted Slab Track in High-Speed Rail via Infrared Thermography. Materials 2020, 13, 4837. https://doi.org/10.3390/ma13214837
AMA Style
Li Z-W, Liu X-Z, Lu H-Y, He Y-L, Zhou Y. Surface Crack Detection in Precasted Slab Track in High-Speed Rail via Infrared Thermography. Materials. 2020; 13(21):4837. https://doi.org/10.3390/ma13214837
Chicago/Turabian StyleLi, Zai-Wei, Xiao-Zhou Liu, Hong-Yao Lu, Yue-Lei He, and Yun‐Lai Zhou. 2020. "Surface Crack Detection in Precasted Slab Track in High-Speed Rail via Infrared Thermography" Materials 13, no. 21: 4837. https://doi.org/10.3390/ma13214837
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