Subsurface Stress Measurement in GIS Epoxy Composite by Using LCR Waves
Internal stress in basin insulators of gas-insulated metal-enclosed switchgear (GIS) can lead to cracks, which affects the safe operation of these apparatuses. In this research, we proposed a subsurface internal stress measurement method for GIS epoxy composites. This method is based on an ultrasoni...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-07-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/13/14/3725 |
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| author | Zhouyiao Zou Yanpeng Hao Yao Zheng Weiming He Fangyuan Tian Lin Yang Licheng Li |
| author_facet | Zhouyiao Zou Yanpeng Hao Yao Zheng Weiming He Fangyuan Tian Lin Yang Licheng Li |
| author_sort | Zhouyiao Zou |
| collection | DOAJ |
| description | Internal stress in basin insulators of gas-insulated metal-enclosed switchgear (GIS) can lead to cracks, which affects the safe operation of these apparatuses. In this research, we proposed a subsurface internal stress measurement method for GIS epoxy composites. This method is based on an ultrasonic longitudinal critically refracted (LCR) wave technique. In this study, some epoxy composite specimens were synthesized with similar materials and manufacturing processes to those of 252 kV GIS basin insulators. An ultrasonic stress measurement system that utilized the LCR wave technique was set-up to investigate the relationship between stress and LCR wave propagation time, as well as to measure the compressive stress of the epoxy specimen within 0–50 MPa. The results show that LCR wave propagation time linearly decreased when stress increased in the subsurface zone and the acoustoelastic coefficient was −4.95. We found the relative errors of stress measurements to be less than 13%. |
| first_indexed | 2024-03-10T18:21:05Z |
| format | Article |
| id | doaj.art-b3caaf69b75e4303adf8218b835af7f5 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T18:21:05Z |
| publishDate | 2020-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-b3caaf69b75e4303adf8218b835af7f52023-11-20T07:18:35ZengMDPI AGEnergies1996-10732020-07-011314372510.3390/en13143725Subsurface Stress Measurement in GIS Epoxy Composite by Using LCR WavesZhouyiao Zou0Yanpeng Hao1Yao Zheng2Weiming He3Fangyuan Tian4Lin Yang5Licheng Li6School of Electric Power, South China University of Technology, Guangzhou 510640, ChinaSchool of Electric Power, South China University of Technology, Guangzhou 510640, ChinaSchool of Electric Power, South China University of Technology, Guangzhou 510640, ChinaSchool of Electric Power, South China University of Technology, Guangzhou 510640, ChinaSchool of Electric Power, South China University of Technology, Guangzhou 510640, ChinaSchool of Electric Power, South China University of Technology, Guangzhou 510640, ChinaSchool of Electric Power, South China University of Technology, Guangzhou 510640, ChinaInternal stress in basin insulators of gas-insulated metal-enclosed switchgear (GIS) can lead to cracks, which affects the safe operation of these apparatuses. In this research, we proposed a subsurface internal stress measurement method for GIS epoxy composites. This method is based on an ultrasonic longitudinal critically refracted (LCR) wave technique. In this study, some epoxy composite specimens were synthesized with similar materials and manufacturing processes to those of 252 kV GIS basin insulators. An ultrasonic stress measurement system that utilized the LCR wave technique was set-up to investigate the relationship between stress and LCR wave propagation time, as well as to measure the compressive stress of the epoxy specimen within 0–50 MPa. The results show that LCR wave propagation time linearly decreased when stress increased in the subsurface zone and the acoustoelastic coefficient was −4.95. We found the relative errors of stress measurements to be less than 13%.https://www.mdpi.com/1996-1073/13/14/3725GIS basin insulatorepoxy compositeultrasonic longitudinal critically refracted wave (LCR)subsurface stress measurement |
| spellingShingle | Zhouyiao Zou Yanpeng Hao Yao Zheng Weiming He Fangyuan Tian Lin Yang Licheng Li Subsurface Stress Measurement in GIS Epoxy Composite by Using LCR Waves Energies GIS basin insulator epoxy composite ultrasonic longitudinal critically refracted wave (LCR) subsurface stress measurement |
| title | Subsurface Stress Measurement in GIS Epoxy Composite by Using LCR Waves |
| title_full | Subsurface Stress Measurement in GIS Epoxy Composite by Using LCR Waves |
| title_fullStr | Subsurface Stress Measurement in GIS Epoxy Composite by Using LCR Waves |
| title_full_unstemmed | Subsurface Stress Measurement in GIS Epoxy Composite by Using LCR Waves |
| title_short | Subsurface Stress Measurement in GIS Epoxy Composite by Using LCR Waves |
| title_sort | subsurface stress measurement in gis epoxy composite by using lcr waves |
| topic | GIS basin insulator epoxy composite ultrasonic longitudinal critically refracted wave (LCR) subsurface stress measurement |
| url | https://www.mdpi.com/1996-1073/13/14/3725 |
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