Author： Ser’eznov A. Stepanova L. Lebedev E. Chaplygin V. Katarushkin S. Kozhemyakin V.
Publisher： MAIK Nauka/Interperiodica
ISSN： 1061-8309
Source： Russian Journal of Nondestructive Testing, Vol.40, Iss.9, 2004-09, pp. : 580-586
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Abstract
The results of cyclic tests of structural elements (SEs) with a stringer, which are made of the composite material (CM) Organit-10T and are parts of an aileron from an ë-80ΓΠ aircraft, are considered. As SEs are broken, information is obtained simultaneously from acoustic-emission (AE) and tensometric equipment and measurements of the fatigue crack’s opening are carried out. An insignificant increase (by 0.25 µm) of the crack opening generates a considerable flow of AE signals. These signals are processed using cluster analysis, which makes it possible to separate the signals emitted by a propagating fatigue crack in the stringer region from the signals arriving from the region of the fracturing gripping jaw.
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