Accession Number:

AD0747225

Title:

Development of a Nondestructive Testing Technique to Determine Flaw Criticality

Descriptive Note:

Final rept. 1 Mar 1969-30 Jun 1971

Corporate Author:

AEROJET SOLID PROPULSION CO SACRAMENTO CA

Report Date:

1972-01-01

Pagination or Media Count:

244.0

Abstract:

The report presents the findings of a study to develop a nondestructive testing technique to determine flaw criticality based upon stress-wave emission. The research included an evaluation of various sensors and instrumentation systems, and several materials and material conditions tested to failure in rising load and low-cycle, high-stress-intensity fatigue. The fracture testing utilized a linear-elastic fracture-mechanics approach. Acoustic emission was the basis of the nondestructive inspection technique. The stress-wave-analysis technique SWAT was shown to be a highly sensitive nondestructive inspection method, capable of detecting growing defects at least an order of magnitude smaller than any other known NDI method and, with a computerized system, capable of locating one or more defects in real time.

Subject Categories:

  • Test Facilities, Equipment and Methods
  • Solid Propellant Rocket Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE