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Causes and potential remedies of brittle fracture failure of composite (non-ceramic) insulators

Kumosa, M. ; Kumosa, L. LU and Armentrout, D. (2004) In IEEE Transactions on Dielectrics and Electrical Insulation 11(6). p.1037-1048
Abstract

Existing brittle fracture models have been reviewed and their applicability to explain the in-service brittle fracture failure of composite (non-ceramic) insulators is evaluated. It is shown that the only brittle fracture model that can explain all aspects of the brittle fracture process is a model based on the formation of nitric acid solutions in-service. The chemical cause of brittle fracture is identified in this work and recommendations are made on how to avoid brittle fracture in-service by proper selection of composite insulator rods resistant to brittle fracture. An attempt is made to clarify misconceptions that exist in the literature regarding the causes of brittle fracture and the most suitable prevention methods.

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author
; and
publishing date
type
Contribution to journal
publication status
published
keywords
Brittle fracture, Composite insulators, Fracture prevention, Glass reinforced polymer (GRP) composites, Non-ceramic insulators, Polymer insulators, Stress corrosion cracking
in
IEEE Transactions on Dielectrics and Electrical Insulation
volume
11
issue
6
pages
1037 - 1048
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • scopus:12344304098
ISSN
1070-9878
DOI
10.1109/TDEI.2004.1387827
language
English
LU publication?
no
id
045a536c-e16a-40b0-9518-472fefe9fa40
date added to LUP
2022-11-26 13:31:36
date last changed
2022-11-28 09:10:27
@article{045a536c-e16a-40b0-9518-472fefe9fa40,
  abstract     = {{<p>Existing brittle fracture models have been reviewed and their applicability to explain the in-service brittle fracture failure of composite (non-ceramic) insulators is evaluated. It is shown that the only brittle fracture model that can explain all aspects of the brittle fracture process is a model based on the formation of nitric acid solutions in-service. The chemical cause of brittle fracture is identified in this work and recommendations are made on how to avoid brittle fracture in-service by proper selection of composite insulator rods resistant to brittle fracture. An attempt is made to clarify misconceptions that exist in the literature regarding the causes of brittle fracture and the most suitable prevention methods.</p>}},
  author       = {{Kumosa, M. and Kumosa, L. and Armentrout, D.}},
  issn         = {{1070-9878}},
  keywords     = {{Brittle fracture; Composite insulators; Fracture prevention; Glass reinforced polymer (GRP) composites; Non-ceramic insulators; Polymer insulators; Stress corrosion cracking}},
  language     = {{eng}},
  number       = {{6}},
  pages        = {{1037--1048}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  series       = {{IEEE Transactions on Dielectrics and Electrical Insulation}},
  title        = {{Causes and potential remedies of brittle fracture failure of composite (non-ceramic) insulators}},
  url          = {{http://dx.doi.org/10.1109/TDEI.2004.1387827}},
  doi          = {{10.1109/TDEI.2004.1387827}},
  volume       = {{11}},
  year         = {{2004}},
}