Abstract
Article presents the research results of aircraft compressor blade damage length and its position influence on fatigue strength under high number cycles conditions. The criteria for blade damage detection classification and test research methodology were developed. Designed and tested the instrumentation for compressor blades fatigue tests. Fluorescent method was used to determine the source of fatigue cracking initiation and its propagation direction during fatigue test.
Highlights
In order to ensure safety in the flight and striving to reduce aircraft operating costs, it is necessary to look for innovative solutions for the control of components and the rotating assembly, especially the critical elements of these constructions
Compressor blades of aircraft engines work under loads causing both low-cycle fatigue and high-cycle fatigue
Analysis of the test results allowed to determine that the length and location of the blade defects on its leading edge strongly, to a different degree, affect its fatigue strength
Summary
Article presents the research results of the influence of aircraft compressor blade damage length and its position on fatigue strength under high number of cycles conditions. During use, there is intensive erosive wear of the blades and their corrosion caused by operating conditions Taking into account these factors, the design requirements for compressor blades of aircraft engines meeting high safety criteria are increasingly rigorous [1]. The analysis of the literature data and the results of own research shows that the majority of failures of aircraft engine compressors are caused by damage to the vanes and their insufficient strength under conditions of permanent and variable loads [3]. Analysis of the causes of engine failures indicates that in the majority of cases, the fatigue strength of the blade after impact by the foreign objects is reduced. The aim of the undertaken research is an attempt to develop a methodology for assessing the impact of damage to the leading edges of an aircraft engine's compressor blades on their fatigue strength
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