NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Application of acoustic emission to flaw detection in engineering materialsMonitoring of structures under operating loads to provide an early warning of possible failure to locate flaws in test specimens subjected to uniaxial tensile loading is presented. Test specimens used are mild steel prismatic bars with small holes at different locations. When the test specimen is loaded, acoustic emission data are automatically collected by two acoustic transducers located at opposite sides of the hole and processed by an acoustic emission analyzer. The processed information yields the difference in arrival times at the transducers, which uniquely determines the flaw location. By using this technique, flaws were located to within 8 percent of their true location. The use of acoustic emission in linear location to locate a flaw in a material is demonstrated. It is concluded that this one-dimensional application could be extended to the general flaw location problem through triangulation.
Document ID
19900039002
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Moslehy, F. A.
(Central Florida, University Orlando, FL, United States)
Date Acquired
August 14, 2013
Publication Date
February 1, 1990
Publication Information
Publication: Experimental Techniques
Volume: 14
ISSN: 0732-8818
Subject Category
Quality Assurance And Reliability
Accession Number
90A26057
Funding Number(s)
CONTRACT_GRANT: NAG10-0058
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available