Experimental methods of determination of short and long-term mechanical strength of ceramic insulators

• Autorzy: Rejmund F. , Ranachowski P.
• Języki publikacji: EN

Abstrakty

EN

The subject of this paper are the properties of ceramic insulators responsible for transmission of mechanical stresses due to their construction and destination. Taking into account the information about failure of the insulators, the effect of electrical stresses imposed on the insulator structure by the electric field can be neglected. In view of this fact, our considerations concern the parameters characterising short and long-term mechanical strengths and the method of forecasting the minimal time to the mechanical failure.

Słowa kluczowe

EN

mechanical strength; ceramic materials; insulator

PL

wytrzymałość; izolator; materiały ceramiczne

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Engineering Transactions
• Rocznik: 1998
• Tom: Vol. 46, iss. 1
• Strony: 131--139
• Opis fizyczny: Bibliogr. 5 poz., rys., tab., wykr.

Twórcy

autor

Rejmund F.

autor

Ranachowski P.

• Polish Academy of Sciences, Institute of Fundamental Technological Research [Polska Akademia Nuk, Istytut Podstawowych Problemów Techniki],

Bibliografia

• 1. J. RANACHOWSKI, F. REJMUND and J. BERTRAND, Quality and reliability of insulators applied to electrical power [in Polish], Mat. of Conf. "Outdoor high voltage insulation for electrical power engineering", Scientific Papers of the Institute of Found. El. Engng. of the Technological University of Wrocław, 32, 9, pp. 19-41, 1997.
• 2. J. RANACHOWSKI and P. RANACHOWSKI, Method of the "lifetime" determination ofceramic insulator material [in Polish], Protocol for Polish Electroenergetic Networks S.A., Warsaw 1997.
• 3. J. RANACHOWSKI, F. REJMUND and P. RANACHOWSKI, Determination of critical stress intensity factor and evaluation of lifetime of line long-rod insulator type LP-75/31W [inPolish], Expert opinion IPPT-PAN, No. NWN/193/BU/95, Warsaw 1996.
• 4. K. NÜHARA, R. MORENA and D.P.H. HASSELMAN, Evaluation of KIc of brittle solids by the indentation method with low crack-to-indent ratios, J.Mater. Sci. Letters, 1,pp. 13-16, 1982.
• 5. J. RAABE and E. BOBRYK, Determination of Weibull factor m and stress intensity coefficient KIc of ceramics for electronics [in Polish], Electronic Materials, 3, 75, 1991.