Studies of the Fracture Process in Composite Structural Elements Based on Strain Measurements and the Acoustic-Emission Technique

Studies of the Fracture Process in Composite Structural Elements Based on Strain Measurements and the Acoustic-Emission Technique

The results of cyclic tests of structural elements (SEs) with a stringer, which are made of the composite material (CM) Organit-IOT and are parts of an aileron from an C-80FH aircraft, are considered. As SEs are broken, information is obtained simultaneously from acoustic-emission (AE) and tensometr...

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Veröffentlicht in:Russian journal of nondestructive testing 2004-09, Vol.40 (9), p.580-586
Hauptverfasser: Ser'eznov, A N, Stepanova, L N, Lebedev, E Yu, Chaplygin, V N, Katarushkin, S A, Kozhemyakin, L
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container_end_page 586
container_issue 9
container_start_page 580
container_title Russian journal of nondestructive testing
container_volume 40
creator Ser'eznov, A N
Stepanova, L N
Lebedev, E Yu
Chaplygin, V N
Katarushkin, S A
Kozhemyakin, L
description The results of cyclic tests of structural elements (SEs) with a stringer, which are made of the composite material (CM) Organit-IOT and are parts of an aileron from an C-80FH 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 mm) 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.
doi_str_mv 10.1007/s11181-004-0002-8
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title Studies of the Fracture Process in Composite Structural Elements Based on Strain Measurements and the Acoustic-Emission Technique
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