Fracture analysis of composite high voltage insulators

• Autorzy: Kumosa M.
• Konferencja: Summer School Of Fracture Mechanics. Current Research On Fatigue And Fracture/sympozjum (VII ; 18-22.06.2001 ; Opole - Pokrzywna, Poland)
• Języki publikacji: EN

Abstrakty

EN

In this presentation, fracture mechanisms caused by the combined effect of mechanical, electrical and environmental stresses in composite high voltage insulators are discussed. In particular, the effect called brittle fracture as well as damage/fracture mechanisms caused by improper crimping are demonstrated. Several experimental procedures developed to simulate the brittle fracture process under laboratory conditions are shown and discussed. In addition, comprehensive non-linear finite element models of crimped composite insulators developed to optimize crimping and to increase the mechanical strength of crimped composite insulators are presented. 1 The effect of crimping on the mechanical strength of composite high voltage insulators is discussed in this presentation.

Słowa kluczowe

EN

composite high voltage insulators; fracture mechanisms

• Wydawca: Oficyna Wydawnicza Politechniki Opolskiej
• Czasopismo: Zeszyty Naukowe. Mechanika / Politechnika Opolska
• Rocznik: 2001
• Tom: z. 67
• Strony: 125--145
• Opis fizyczny: Bibliogr. 12 poz., il., schem., wykr.

Twórcy

autor

Kumosa M.

• Center for Advanced Materials and Structures, Department of Engineering, University of Denver, Denver, Colorado, USA

Bibliografia

• [1] M. Kumosa H. Shankara Narayan Q. Qui and A. Bansal, Brittle Fracture of Non- Ceramic Suspension Insulators with Epoxy Cone End-Fittings. Composite Science and Technology, Vol. 57 (1997) pp. 739-751.
• [2] Q. Qiu and M. Kumosa, Corrosion of E-glass Fibers in Acidic Environments, Composites Science and Technology, Vol. 57 (1997) pp. 497-507.
• [3] R. Chughtai D. M. Smith and M. Kumosa, Chemical Analysis of a Field-Failed Composite Suspension Insulator, Composite Science and Technology, Vol. 58 (1998) pp. 1641-1647.
• [4] S.H. Carpenter and M. Kumosa, An Investigation of Brittle Fracture of Composite Insulator Rods in an Acid Environment with Either Static or Cyclic Loading, J. Materials Science. Vol. 35(17) (2000) pp. 4465-4476.
• [5] T. Ely and M. Kumosa, The Stress Corrosion Experiments on an E-glass/Epoxy Unidirectional Composite, J. Composite Materials Vol. 34(10) (2000) pp. 841-878.
• [6] M. Megel L. Kumosa, T. Ely D. Armentrout and M. Kumosa, Initiation of Stress-Corrosion Cracking in Unidirectional Glass/Polymer Composite Materials, Composite Science and Technology, Vol. 61 (2001) pp. 231-246.
• [7] T. Ely, D. Armentrout and M. Kumosa, Evaluation of Stress Corrosion Properties of Pultruded Glass Fiber/Polymer Composite Materials, J. Composite Materials, Vol. 35 (2001) pp. 751-773.
• [8] L. Kumosa, D. Armentrout and M. Kumosa, An Evaluation of the Critical Condi¬tions for the Initiation of Stress Corrosion Cracking in Unidirectional E- glass/Polymer Composites, Composite Science and Technology, Vol. 61 (2001) pp. 615-623.
• [9] Bansal A., Schubert M.V., Balakrishnan and M. Kumosa, Finite Element Analysis of Substation Composite Insulators, Composites Science and Technology, Vol. 55 (1995) pp. 375-389.
• [10] Bansal and M. Kumosa, Mechanical Evaluation of Axially Loaded Composite Insulators with Crimped End-Fittings, Journal of Composite Materials, Vol. 31, No 20 (1997) pp. 2074-2104.
• [11] M. Kumosa, Y. Han and L. Kumosa, Analyses of Composite Insulators with Crimped End-Fittings: Part I - Non Linear Finite Element Computations, submitted for publication.
• [12] M. Kumosa, D. Armentrout, L. Kumosa, Y. Han and S.II. Carpenter, Analyses of Composite Insulators with Crimped End-Fittings: Part II - Suitable Crimping Conditions, submitted for publication.