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Stress Measurements of GIS Epoxy Composite with Transverse Waves Based on the Ultrasonic Pulse-Echo Method

Zou, Zhouyiao ; Qiu, Haian ; Tian, Fangyuan ; Kuang, Cuizhe ; He, Weiming ; Zhou, Fusheng ; Gu, Yu ; Ma, Haomin ; Ruan, Youde ; Huang, Zhiming

Applied sciences, 2023-10, Vol.13 (20), p.11317 [Periódico revisado por pares]

Basel: MDPI AG

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Título:
Stress Measurements of GIS Epoxy Composite with Transverse Waves Based on the Ultrasonic Pulse-Echo Method
Autor: Zou, Zhouyiao ; Qiu, Haian ; Tian, Fangyuan ; Kuang, Cuizhe ; He, Weiming ; Zhou, Fusheng ; Gu, Yu ; Ma, Haomin ; Ruan, Youde ; Huang, Zhiming
Assuntos: acoustoelastic effect ; Composite materials ; Curing ; Epoxy resins ; Geographic information systems ; GIS epoxy composite ; Measurement ; Methods ; Propagation ; Residual stress ; Strain gauges ; Stress measurement ; Stress state ; ultrasonic transverse waves ; Velocity
É parte de: Applied sciences, 2023-10, Vol.13 (20), p.11317
Descrição: The mechanical reliability of the gas-insulated metal-enclosed switchgear (GIS) is critical to the safe and stable operation of a power system. The internal stress induced in GIS insulators, which typically lead to cracking, can degrade the mechanical properties and compromise the reliability of the GIS. In this work, ultrasonic nondestructive measurements of the internal stress in a GIS 126 kV epoxy composite with the transverse waves are demonstrated for the first time. Our results show that the velocities of ultrasonic transverse waves increase linearly with the compressive stress and decrease linearly with the tensile stress. The acoustoelastic coefficients are −1.18 × 10−4/MPa and −1.96 × 10−4/MPa for measurements with transverse waves polarized vertically and parallelly to stress, respectively. Based on these acoustoelastic coefficients, the internal stresses are calculated, and the maximum absolute values of relative errors are 35.4% and 26.3% for measurements with the transverse wave polarized vertically and parallelly to stress, respectively.
Editor: Basel: MDPI AG
Idioma: Inglês

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Stress Measurements of GIS Epoxy Composite with Transverse Waves Based on the Ultrasonic Pulse-Echo Method

Zou, Zhouyiao ; Qiu, Haian ; Tian, Fangyuan ; Kuang, Cuizhe ; He, Weiming ; Zhou, Fusheng ; Gu, Yu ; Ma, Haomin ; Ruan, Youde ; Huang, Zhiming

Basel: MDPI AG

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