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Acoustic emission of cyclical loaded aircraft structures
Blaháček, Michal ; Skála, J.
Aircraft structures fatigue failure is considerable risk of today´s aviation safety. The problem is usually solved by critical parts preventive replacement, regardless of parts real state. It is very expensive and uneconomical solution. NDT method capable to find the changes in the part, that are indication of crack creation and growth, would be very useful and money saving.Acoustic emission (AE) is a NDT procedure that is candidate for the method. In the Aeronautical Research and Test Institute (VZLÚ) set of cyclical fatigue tests was done. During the test, loaded sample AE activity was monitored, during the loading sequence pauses, the sample state was checked using NDT methods such us ultrasound, eddy current, optical methods, non-linear ultrasound, etc. Presented paper attends to desription and analysis of AE measurement on cyclical loaded aircraft structure.
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