Brittle fracture in nonceramic insulators: Electrical aspects of microscopic flaws in Glass Reinforced Plastic (GRP) rods

J. Montesinos; R. S. Gorur; Barzin Mobasher; D. Kingsburry

doi:10.1109/94.993742

Brittle fracture in nonceramic insulators: Electrical aspects of microscopic flaws in Glass Reinforced Plastic (GRP) rods

J. Montesinos, R. S. Gorur, Barzin Mobasher, D. Kingsburry

Civil and Environmental Engineering

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

Glass Reinforced Plastic (GRP) rods used in Non-Ceramic Insulators (NCI) were examined for microscopic defects in order to evaluate their role in causing brittle fracture. The rods evaluated utilized different types of glass fibers and resin systems. Niemeyer's generalized approach to Partial Discharge (PD) modeling was used to investigate the development of electrical discharges inside the rods. The results indicated that the PD inception voltage was well above the highest system voltage used presently. Thus, it was concluded that the reactive species required for the formation of acids could not be developed inside the rod. The results also suggest that chemical reactions other than acid production can promote stress corrosion cracking of the rod and these may play a significant role in the failure process.

Original language	English (US)
Pages (from-to)	244-252
Number of pages	9
Journal	IEEE Transactions on Dielectrics and Electrical Insulation
Volume	9
Issue number	2
DOIs	https://doi.org/10.1109/94.993742
State	Published - Apr 2002

ASJC Scopus subject areas

Electrical and Electronic Engineering

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10.1109/94.993742

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title = "Brittle fracture in nonceramic insulators: Electrical aspects of microscopic flaws in Glass Reinforced Plastic (GRP) rods",

abstract = "Glass Reinforced Plastic (GRP) rods used in Non-Ceramic Insulators (NCI) were examined for microscopic defects in order to evaluate their role in causing brittle fracture. The rods evaluated utilized different types of glass fibers and resin systems. Niemeyer's generalized approach to Partial Discharge (PD) modeling was used to investigate the development of electrical discharges inside the rods. The results indicated that the PD inception voltage was well above the highest system voltage used presently. Thus, it was concluded that the reactive species required for the formation of acids could not be developed inside the rod. The results also suggest that chemical reactions other than acid production can promote stress corrosion cracking of the rod and these may play a significant role in the failure process.",

author = "J. Montesinos and Gorur, {R. S.} and Barzin Mobasher and D. Kingsburry",

note = "Funding Information: This work was supported in part by Florida Power and Light Company and the National Science Foundation ECS-9701539. The assistance of Mr. J. Wheatley, Mr. D. Wright (both ASU), Dr. E. A. Cherney (EACH Engineering Inc.) and Mr. T. s. McQuarrie, Glasforms, Inc. are also acknowledged.",

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T2 - Electrical aspects of microscopic flaws in Glass Reinforced Plastic (GRP) rods

AU - Montesinos, J.

AU - Gorur, R. S.

AU - Mobasher, Barzin

AU - Kingsburry, D.

N1 - Funding Information: This work was supported in part by Florida Power and Light Company and the National Science Foundation ECS-9701539. The assistance of Mr. J. Wheatley, Mr. D. Wright (both ASU), Dr. E. A. Cherney (EACH Engineering Inc.) and Mr. T. s. McQuarrie, Glasforms, Inc. are also acknowledged.

PY - 2002/4

Y1 - 2002/4

N2 - Glass Reinforced Plastic (GRP) rods used in Non-Ceramic Insulators (NCI) were examined for microscopic defects in order to evaluate their role in causing brittle fracture. The rods evaluated utilized different types of glass fibers and resin systems. Niemeyer's generalized approach to Partial Discharge (PD) modeling was used to investigate the development of electrical discharges inside the rods. The results indicated that the PD inception voltage was well above the highest system voltage used presently. Thus, it was concluded that the reactive species required for the formation of acids could not be developed inside the rod. The results also suggest that chemical reactions other than acid production can promote stress corrosion cracking of the rod and these may play a significant role in the failure process.

AB - Glass Reinforced Plastic (GRP) rods used in Non-Ceramic Insulators (NCI) were examined for microscopic defects in order to evaluate their role in causing brittle fracture. The rods evaluated utilized different types of glass fibers and resin systems. Niemeyer's generalized approach to Partial Discharge (PD) modeling was used to investigate the development of electrical discharges inside the rods. The results indicated that the PD inception voltage was well above the highest system voltage used presently. Thus, it was concluded that the reactive species required for the formation of acids could not be developed inside the rod. The results also suggest that chemical reactions other than acid production can promote stress corrosion cracking of the rod and these may play a significant role in the failure process.

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Brittle fracture in nonceramic insulators: Electrical aspects of microscopic flaws in Glass Reinforced Plastic (GRP) rods

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