FOREIGN OBJECT DAMAGE AND FATIGUE STRENGTH LOSS IN COMPRESSOR BLADES / Nikhamkin Mickhail S.,Voronov Leonid V.,Semenova Irina V. // . - 2008. - V. , l. . - P. 245-251.

ISSN/EISSN:

нет данных / нет данных

Type:

Proceedings Paper

Abstract:

Foreign object damage (FOD) is always an all-important problem of gas turbine engines safety, reliability and operating costs. This paper describes experimental and numerical prediction investigations of FOD to compressor blades of gas turbine engine. Experimental modeling of FOD processes was done using a special plant on the base of a pneumatic gun. Real steel blades of a high-pressure compressor were impacted with spherical steel projectiles at the velocity about 200 m/s. Typical in-service damages as well as round dents, tears and bends were reproduced in the experiment. Numerical prediction analyses of the damage process were fulfilled by finite element method (FEM). Material behavior is described with elastic-plastic strain rate dependent model. We find the form and sizes of the calculated damages to be in good agreement with the experimental findings. Furthermore, the experimental and computational procedure for estimation of fatigue strength loss of damaged blades is proposed. It is based on study of stress concentration in damages. Stress concentration factor for different concentrator shapes was calculated using 3-D finite element analyses and refined via a stress concentration sensitivity factor. Stress concentration sensitivity factor was experimentally defined through fatigue tests of real blades with V-shape notches at leading edge. This technique supposes minimum laborious fatigue tests. Experimentally confirmed numerical methodology and model may be used for prediction study of FOD and fatigue strength loss of gas turbine engine blades.

Author keywords:

Foreign object damage (FOD); experimental and numerical study; finite element method (FEM); impact; compressor blade; stress concentration

DOI:

нет данных

Web of Science ID:

ISI:000262646400026

Соавторы в МНС:

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Другие поля

Поле	Значение
Book-Group-Author	ASME
Booktitle	PROCEEDINGS OF THE ASME TURBO EXPO 2008, VOL 5, PT A
Note	53rd ASME Turbo Expo 2008, Berlin, GERMANY, JUN 09-13, 2008
Organization	Int Gas Turbine Inst; ASME
Publisher	AMER SOC MECHANICAL ENGINEERS
Address	THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
Language	English
ISBN	978-0-7918-4315-4
Research-Areas	Engineering; Transportation
Web-of-Science-Categories	Engineering, Mechanical; Transportation Science \& Technology
Author-Email	nikhamkin@pstu.ac.ru kaf-ad@cpl.pstu.ac.ru
ResearcherID-Numbers	Semenova, Irina/J-4761-2013
Number-of-Cited-References	11
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	12
Doc-Delivery-Number	BIT76