Accession Number : ADA139482

Title :   An Acoustical Imaging System for the Inspection of Solid Rocket Motors.

Descriptive Note : Final rept. Jul 81-Dec 83,


Personal Author(s) : Busse,L J ; Collins,H D ; Eick,J L ; Gribble,R P ; Sperline,P D

PDF Url : ADA139482

Report Date : Jan 1984

Pagination or Media Count : 59

Abstract : This report describes the development and operation of an acoustical imaging, nondestructive test system for the inspection of small rocket motors. This report is intended to document the accomplishments of the program, the theoretical background, and the operational characteristics of the inspection system. The major objective of this program was to develop an acoustical imaging, nondestructive testing system for small rocket motors (i.e., 13-20 cm diameter). This inspection system was to be capable of detecting two types of defects within these rocket motors: (1) internal defects of inner-bore cracks; and (2) separations or debond between the various layers making up the wall of the rocket motor. The system was shown to be capable of detecting all of the flaw types it was originally designed to detect: (1) case/liner debonds; (2) liner/propellant debonds; and (3) inner-bore cracks. Case/liner debonds are reliably detected using the chirp frequency debond test, and the other two flaws are evident using the low frequency transmission test.

Descriptors :   *Ultrasonic tests, *Defects(Materials), *Solid propellant rocket engines, *Inspection, Acoustic detection, Images, Solid rocket propellants, Cracks, Bonding, Linings, Internal, Computer applications, Image processing, Separation, Low frequency, Acoustic signatures, Nondestructive testing

Subject Categories : Test Facilities, Equipment and Methods
      Acoustic Detection and Detectors
      Solid Propellant Rocket Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE