7 April 2009 Development of self-sensing BFRP bars with distributed optic fiber sensors
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Abstract
In this paper, a new type of self-sensing basalt fiber reinforced polymer (BFRP) bars is developed with using the Brillouin scattering-based distributed optic fiber sensing technique. During the fabrication, optic fiber without buffer and sheath as a core is firstly reinforced through braiding around mechanically dry continuous basalt fiber sheath in order to survive the pulling-shoving process of manufacturing the BFRP bars. The optic fiber with dry basalt fiber sheath as a core embedded further in the BFRP bars will be impregnated well with epoxy resin during the pulling-shoving process. The bond between the optic fiber and the basalt fiber sheath as well as between the basalt fiber sheath and the FRP bar can be controlled and ensured. Therefore, the measuring error due to the slippage between the optic fiber core and the coating can be improved. Moreover, epoxy resin of the segments, where the connection of optic fibers will be performed, is uncured by isolating heat from these parts of the bar during the manufacture. Consequently, the optic fiber in these segments of the bar can be easily taken out, and the connection between optic fibers can be smoothly carried out. Finally, a series of experiments are performed to study the sensing and mechanical properties of the propose BFRP bars. The experimental results show that the self-sensing BFRP bar is characterized by not only excellent accuracy, repeatability and linearity for strain measuring but also good mechanical property.
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Yongsheng Tang, Yongsheng Tang, Zhishen Wu, Zhishen Wu, Caiqian Yang, Caiqian Yang, Sheng Shen, Sheng Shen, Gang Wu, Gang Wu, Wan Hong, Wan Hong, } "Development of self-sensing BFRP bars with distributed optic fiber sensors", Proc. SPIE 7293, Smart Sensor Phenomena, Technology, Networks, and Systems 2009, 729317 (7 April 2009); doi: 10.1117/12.815767; https://doi.org/10.1117/12.815767
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