Test Methods and Vibration Monitoring of Samples and Blades of Aircraft Engines with Cracks

  1. Dr. P. J. Winkler
  1. A. Roytman and
  2. T. Khristenko

Published Online: 23 DEC 2005

DOI: 10.1002/3527606025.ch38

Materials for Transportation Technology, Volume 1

Materials for Transportation Technology, Volume 1

How to Cite

Roytman, A. and Khristenko, T. (2000) Test Methods and Vibration Monitoring of Samples and Blades of Aircraft Engines with Cracks, in Materials for Transportation Technology, Volume 1 (ed P. J. Winkler), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527606025.ch38

Editor Information

  1. DaimlerChrysler AG, Forschung und Technologie, Postfach 800 465, 81663 München, Germany; Tel.: 089–607 22393; Fax: 089–607 28627

Author Information

  1. Zaporozhye State University, Ukraine

Publication History

  1. Published Online: 23 DEC 2005
  2. Published Print: 20 APR 2000

Book Series:

  1. EUROMAT 99

ISBN Information

Print ISBN: 9783527301249

Online ISBN: 9783527606023

SEARCH

Keywords:

  • transportation technology;
  • materials;
  • aerospace applications;
  • aircraft engines with cracks;
  • test methods;
  • vibration monitoring

Summary

The present work shows that one can use, as the criterion of the fatigue crack location the ratio of the root-mean square value of the vibration amplitudes of the higher harmonics of the acoustic signals to the root-mean square value of the amplitude of the signal. This ratio is called the harmonic coefficient Kg. The cycle asymmetry and the presence of the additional resonance types at the crack formation are under consideration. They are used as the diagnostic criterion to detect the cracks.