Acoustic Emission Investigation - Helicopter Rotor System.

reportActive / Technical Report | Accession Number: ADA033571 | Open PDF

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.

Author(s):
Rusnak, R. M. ; Yee, H. C. ; Sen, J. K.
Author Organization(s):
BENDIX RESEARCH LABS SOUTHFIELD MICH
Descriptive Note:
Final rept. Apr 73-Dec 75,
Pagination:
0110

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
RLD-7980, USAAMRDL-TR-76-11
Contract/Grant Number(s):
DAAJ02-73-C-0066
Task Number(s):
1F162205A11908
Project Number(s):
DA-1-F-162205-A-119
Monitor Series:
TR-76-11
 Subject Terms
Communities of Interest:
Air Platforms
Descriptor(s):
*HELICOPTER ROTORS, *ACOUSTIC EMISSIONS, *ULTRASONIC TESTS, NONDESTRUCTIVE TESTING, MONITORING, CRACKING(FRACTURING), ROTOR BLADES(ROTARY WINGS), CRACK PROPAGATION, FATIGUE TESTS(MECHANICS)
Field(s)/Group(s):
Helicopters, Test Facilities, Equipment and Methods
Report Date:
1976 Nov 01