Acoustic Emission Investigation - Helicopter Rotor System.
Abstract
An investigation was carried out to determine the feasibility of detecting fatigue crack initiation and growth in dynamically loaded helicopter rotor systems. This was accomplished by first conducting laboratory tests to determine fatigue emission characteristics, signal attenuation, ambient extraneous noise characteristics, and potential noise discrimination methods. The information procured from the laboratory tests was employed to design and assemble an acoustic emission monitoring system. The utility of this system in detecting fatigue crack initiation and growth was demonstrated during fatigue tests of full-scale blade sections.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1976
- Accession Number
- ADA033571
Entities
People
- H. C. Yee
- J. K. Sen
- R. M. Rusnak