Acoustic Emission Monitoring of Ablative Composite Liner Bonded on Steel Nozzle under Static Loading

Abstract

AE technique was applied to the structural strength tests of the ablative composite liner bonded on steel nozzle to figure out the unexpected problem that happened during the flight test. Two different kinds of specimen, which were specimens with some initial crack and without initial crack each, were used for the test. AE test methodology and parameters were investigated to assess the damage of them. NDT using X-ray technique was performed to improve the test reliability before and after each test. The study revealed that AE technique is a good method to evaluate damage on this kind of specimen with better accuracy.

Evaluation of Static Structural Integrity for Composites Wing Structure by Acoustic Emission Technique

“…국내에서도 구조시험분야에 유용한 도구로 활발히 활용되고 있으며, 최근에도 AE기법을 응 용하여 유도탄의 노즐 조립체, 플라스틱 쉘 구조 물, 연소관 조립체 등에 대한 균열발생위치 및 발생하중을 평가하고, 내부손상을 평가하는 구조 건전성 평가에 유용한 도구로 적용되고 있 다. [8][9][10][11][12][13][14] …”