Ultrasonic Evaluation of SRMU Bondlines

Pulse Echo (PE) ultrasonic evaluation of a Solid Rocket Motor Upgrade (SRMU) test sample was performed in our laboratory. The test sample contained simulated delaminations between both the Gr/Ep composite/insulator bondline and the insulator/inert propellant bondline. In this report, the acoustic pr...

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Bibliographic Details
Main Authors: Johnson, Eric C, Schurr, Juliet N, Hawkins, Gary F
Format: Report
Language:English
Subjects:
ACOUSTIC PROPERTIES
COMPOSITES
ECHOES
LAMINATES
Liquid Rocket Propellants
MATERIALS
PROPAGATION
PULSE ECHO
PULSES
SIMULATION
SOLID PROPELLANT ROCKET ENGINES
SOLID ROCKET PROPEELANTS
TEST AND EVALUATION
THEORY
ULTRASONIC TESTING
ULTRASONIC TESTS
ULTRASONICS
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Summary:Pulse Echo (PE) ultrasonic evaluation of a Solid Rocket Motor Upgrade (SRMU) test sample was performed in our laboratory. The test sample contained simulated delaminations between both the Gr/Ep composite/insulator bondline and the insulator/inert propellant bondline. In this report, the acoustic properties of the SMRU component materials are used to construct a theoretical model for ultrasonic pulse propagation within the sample. The experimental results are then compared with the predictions from this model. This evaluation showed that PE ultrasonic inspection of the SRMU bondlines is feasible. In addition, several means for improving one's capability to detect disbonded regions are suggested. Original contains color plates: All DTIC and NTIS reproductions will be in black and white.