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Development of Ultrasonic Testing Method for Evaluation of Adhesive Layer of Blaster Tube  

Kim, Y.H. (성균관대학교 기계공학부)
Song, S.J. (성균관대학교 기계공학부)
Park, J.S. (성균관대학교 기계공학부)
Cho, H. (성균관대학교 기계공학부)
Lim, S.Y. (국방과학연구소)
Yun, N.G. (국방과학연구소)
Park, Y.J. (국방과학연구소)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.8, no.2, 2004 , pp. 46-53 More about this Journal
Abstract
Ultrasonic testing method has been developed to evaluate flaw of adhesive layers in blast tube for the reliability of the rocket nozzle. The ultrasonic reflection from the interface between the steel sheet and the epoxy adhesive is measured with a high-frequency Pulse-echo setup in order to identify contact debonding and missing adhesive in epoxy layer between steel and FRP layers. The steel sheet is resonated by low-frequency ultrasound, and the gap size underneath the measuring location is estimated from the resonance responses. For practical application in industry an automated testing system has been developed where the proposed approach is implemented. The performance of the proposed approach has been verified by actual measurement of gap sizes from the cross-sections of cut specimens using an optical microscope.
Keywords
Ultrasonic Testing; Blast Tube; Adhesive Layer;
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  • Reference
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