Preliminary communication

Estimate of a power distributor life span based on the fracture mechanics criteria

Jelena M. Djokovic ; Technical Faculty of Bor, University of Belgrade, Vojske Jugoslavije 12, 19210 Bor, Serbia
Ruzica R. Nikolic orcid.org/0000-0003-3042-8916 ; Faculty of Mechanical Engineering, University of Kragujevac, Sestre Janjic 6 34000 Kragujevac, Serbia
Emina S. Dzindo ; Innovation Center of Faculty of Mechanical Engineering, Belgrade, Kraljice Marije 16, 11000 Belgrade, Serbia
Dobrivoje M. Catic ; Faculty of Mechanical Engineering, University of Kragujevac, Sestre Janjic 6 34000 Kragujevac, Serbia

Abstract

Dimensioning of pressure vessels can be done according to various criteria, the basic one being the safety against the fracture by splashing. In this paper two methods for this dimensioning procedure are presented. The first one is based on application of the classical mechanics while the second one uses the fracture mechanics principles. Both methods were applied for checking the exploitation properties and capability of a vapor distributor in a power plant. Based on the in-situ measured damages and calculations by both methods, it was concluded that the vapor distributor could be further used as a part of the boiler installation in the local power plant. The second criterion, based on the application of the fracture mechanics principles, provided more reliable results than the first one, based on the classical mechanics.

Keywords

creep crack growth; critical crack length; critical stress intensity factor; fatigue life; fracture mechanics approach; pressure vessel; distributor

Hrčak ID:

65934

URI

https://hrcak.srce.hr/65934

Publication date:

31.3.2011.

Article data in other languages: croatian

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