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A Study on the Nondestructive Test Method for Adhesively Bonded Joint in Motor Case Assembly  

Hwang, Tae-Kyung (Agency for Defence Development)
Lee, Sang-Ho (Agency for Defence Development)
Kim, Dong-Ryun (Agency for Defence Development)
Moon, Soon-Il (Agency for Defence Development)
Publication Information
Journal of the Korean Society for Nondestructive Testing / v.26, no.5, 2006 , pp. 343-352 More about this Journal
Abstract
In the present paper, the nondestructive test method was suggest to establish the bonding status of a motor case assembly composed of a steel motor case, adiabatic rubber layer and an ablative composite tube with strain data, AE(acoustic emission) signals and UT(ultrasonic test) data. And, finite element analysis was conducted to verify quantitatively the bonding status of motor case assembly under inner pressure loading. The bonding status could be judged whether the bonding status is perfect or contact condition by the data correlation study with AE signals and strain data measured from air pressure test. And, to classify the bonding status of motor case and rubber layer among bonding layers, UT method was also applied. From this study, the bonding status could be classified and detected into fourth types for all bonding layers as follows: (1) initial un-bonding, (2) perfect do-bonding during an air pressure test, (3) partially de-bonding during an air pressure test, and (4) perfect bonding.
Keywords
Motor Case Assembly; Adhesive Joint; Finite Element Analysis; Acoustic Emission; Ultrasonic Test;
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