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http://dx.doi.org/10.5139/JKSAS.2006.34.10.032

Structural Integrity Evaluation of Nozzle Assembly using Acoustic Emission Technique  

설창원 (국방과학연구소)
이기범 (국방과학연구소)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.34, no.10, 2006 , pp. 32-39 More about this Journal
Abstract
An acoustic emission technique was applied to the structural strength test for the structural integrity evaluation of the nozzle assembly. These AE results were compared with data from the strain gages and displacement transducer. NDT using X-ray technique was performed to improve the test reliability before and after each test. In this structural integrity evaluation of the nozzle assembly, the internal crack initiation in the structure could not be precisely revealed by the strain and displacement results but the location and load level of the initiated crack could be precisely evaluated by using AE technique. From this test, it was proven that some new cracks can be generated in composite liner of nozzle assembly under the unexpected load due to interference between obturator and nozzle and these can be a cause of the unexpected abnormal failure.
Keywords
Acoustic Emission; Structural Integrity Evaluation; Structural Strength Test; Nozzle Assembly; Crack Initiation; NDT;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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