Analysis of Residual Stress in Electrical Penetration Assembly Based on a Fiber Bragg Grating Sensor†
AbstractAn important factor for maintaining hermeticity of a metal-to-glass sealed electrical penetration assembly (EPA) is the residual stress in the sealing glass, which is generated during the EPA sealing process. A novel method to investigate and optimize the sealing process of EPAs, based on a fiber Bragg grating (FBG) sensor, is proposed in this research. An FBG was well bonded with sealing glass to measure the parameters of the glass during the sealing process. The temperature change during the heating process was able to be measured by Bragg wavelength shift. After the sealing glass solidified and dropped to room temperature, the residual stress was determined and the effect of temperature was minimized because the temperature before and after the sealing process was the same as room temperature. The curing temperature of the sealing glass was evaluated to specifically investigate the solidification process of the EPA. This study provides a basis for online stress and temperature monitoring of EPAs under external loads in nuclear power plants. View Full-Text
Share & Cite This Article
Fan, Z.; Diao, X.; Zhang, Y.; Liu, M.; Chen, F.; Huang, Z.; Yan, H. Analysis of Residual Stress in Electrical Penetration Assembly Based on a Fiber Bragg Grating Sensor. Sensors 2019, 19, 18.
Fan Z, Diao X, Zhang Y, Liu M, Chen F, Huang Z, Yan H. Analysis of Residual Stress in Electrical Penetration Assembly Based on a Fiber Bragg Grating Sensor. Sensors. 2019; 19(1):18.Chicago/Turabian Style
Fan, Zhichun; Diao, Xingzhong; Zhang, Yong; Liu, Malin; Chen, Feng; Huang, Zhiyong; Yan, He. 2019. "Analysis of Residual Stress in Electrical Penetration Assembly Based on a Fiber Bragg Grating Sensor." Sensors 19, no. 1: 18.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.