Author(s):
1. Strain Posavljak, Mašinski fakultet Univerziteta u Banjoj Luci, Republic of Srpska, Bosnia and Herzegovina
2. Katarina Maksimović, City Administartion of City of Belgrade, Secretariat for Utilities Services, Serbia
3. Slobodanka Boljanović, High School of Mechanical Engineering, Belgrade, Serbia

Abstract:
Attention in this paper is devoted to eccentrically arranged holes in turbojet engine rotating disks and to blade-disk dovetail joints. Fatigue resistance of flat disk with eight and flat disk with increased number of eccentrically arranged holes was analyzed. Fatigue resistance of two forms of blade-disk dovetail joints was analyzed also. In the fatigue resistance analysis, different combination of geometry and cyclic material properties was taken into account. Materials that are nominated for workmanship of flat disks and elements of blade-disk dovetail joints are steel 13H11N2V2MF and nickel alloy Inconel 718. It was shown that fatigue resistance of turbojet engine rotating disks can be improved with increased number of eccentrically arranged holes. On the other hand it was shown that small change of blade-disk joint geometry can significantly to improve fatigue resistance of turbojet engine rotating disk if we apply Inconel 718.

Key words:
fatigue resistance,geometry,cyclic material properties,turbojet engine rotating disks

Date of abstract submission:
13.02.2013.

Conference:
DEMI 2013