Diversification of Acoustical Holography as a Nondestruct Inspection Technique to Determine Aging Damage in Solid Rocket Motors.
HOLOSONICS INC RICHLAND WASH
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The feasibility of using acoustical holography as a nondestructive technique for determining small innerbore cracks and debonds in larger solid rocket motors was demonstrated. Cracks as small as one inch long, one-half inch deep, and less than 0.002-in. thick located on the innerbore of simulated Minuteman first, second, and third stage motors 18-in. web-thickness were readily identified. Unbonds of one square inch area between the case and propellant were imaged. Acoustic attenuation in TITAN III C type propellant was measured. Off axis scanning and concentric axial scanning were investigated. Author
- Test Facilities, Equipment and Methods