ANALYSIS OF OPERATION FRACTURE FOR ENGINE COMPRESSOR AND TURBINE DISKS AND COMPUTATIONAL-EXPERIMENTAL BACKGROUND OF THE MADE DECISIONS

摘要

In this paper fatigue crack growth under operation conditions for rotating disks of aircraft gas turbine engines is analyzed. Initiation and growth of surface cracks for compressor disks made from two-phase titanium alloy has occurred in a disk and blade attachment. Damage accumulation and growth for turbine disks made from steel took place on the inner surface of hole in a hub of wheel. For analysis and prevention of operation failures of engine rotating components is suggested approach of simulation modeling. In the approach described, finite-element models in two and three dimensions were applied to the study of stress-strain state and stress intensity factors for the basic configurations of compressor and turbine disks and their operation damages. Proposed design modifications and repair technologies to existing in service aircraft gas turbine engine rotating components are analyzed and substantiated on a static strength and fatigue life basis.