Engineering Mechanics

Proceedings Vol. 21 (2015)

ENGINEERING MECHANICS 2015

Copyright © 2015 Institute of Theoretical and Applied Mechanics, Academy of Sciences of the Czech Republic, v.v.i., Prague

 

M. Weis, J. Cejpek, J. Juračka
pages 366 - 367, full text

Acoustic emission (AE) is current trend of non-destructive monitoring methods. It suits perfectly for supporting of fatigue tests. Method is also applicable in monitoring of quasi-static tests. AE helps the engineers to understand the degradation process in the tested object and also keep track of the failures. Article offers an insight into the practical experience with acoustic emission. Tests of three different composite structures (wing, fuselage and hull panel) were chosen to illustrate the application of AE monitoring system during fatigue and quasi-static tests. These tests have shown that accuracy of localization is sufficient to identify damaged areas. Moreover the system may offer an early warning of upcoming failure. Method used and described in this article is the “passive acoustic emission detection”. This means, that the sensors, attached to the tested structure, were “listening” to the emissions produced (emitted) by component due to the external loading. This external force builds the level of elastic energy in the structure, which is released afterwards as the sound and heat energy. The released energy travels through the structure with certain speed, specific to each material.

Text and facts may be copied and used freely, but credit should be given to these Proceedings.

All papers were reviewed by members of the scientific committee.