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Sensors 2016, 16(10), 1686; doi:10.3390/s16101686

Application of CCG Sensors to a High-Temperature Structure Subjected to Thermo-Mechanical Load

1
Centre for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150080, China
2
Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
3
Advanced Composites Centre for Innovation and Science (ACCIS), University of Bristol, Bristol BS8 1TR, UK
*
Authors to whom correspondence should be addressed.
Academic Editors: Teen-Hang Meen, Shoou-Jinn Chang, Stephen D. Prior and Artde Donald Kin-Tak Lam
Received: 31 July 2016 / Revised: 13 September 2016 / Accepted: 19 September 2016 / Published: 13 October 2016
View Full-Text   |   Download PDF [4105 KB, uploaded 13 October 2016]   |  

Abstract

This paper presents a simple methodology to perform a high temperature coupled thermo-mechanical test using ultra-high temperature ceramic material specimens (UHTCs), which are equipped with chemical composition gratings sensors (CCGs). The methodology also considers the presence of coupled loading within the response provided by the CCG sensors. The theoretical strain of the UHTCs specimens calculated with this technique shows a maximum relative error of 2.15% between the analytical and experimental data. To further verify the validity of the results from the tests, a Finite Element (FE) model has been developed to simulate the temperature, stress and strain fields within the UHTC structure equipped with the CCG. The results show that the compressive stress exceeds the material strength at the bonding area, and this originates a failure by fracture of the supporting structure in the hot environment. The results related to the strain fields show that the relative error with the experimental data decrease with an increase of temperature. The relative error is less than 15% when the temperature is higher than 200 °C, and only 6.71% at 695 °C. View Full-Text
Keywords: fibre optic sensors; strain and temperature; chemical composition gratings (CCGs); high temperature application; hot structure; thermo-mechanical fibre optic sensors; strain and temperature; chemical composition gratings (CCGs); high temperature application; hot structure; thermo-mechanical
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Xie, W.; Meng, S.; Jin, H.; Du, C.; Wang, L.; Peng, T.; Scarpa, F.; Xu, C. Application of CCG Sensors to a High-Temperature Structure Subjected to Thermo-Mechanical Load. Sensors 2016, 16, 1686.

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