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Studies of the fracture process in composite structural elements based on strain measurements and the acoustic-emission technique

  • Acoustic Methods
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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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REFERENCES

  1. Kuksenko, V.S., Stanchits, S.A., and Tomilin, N.G., Estimation of the Sizes of Growing Cracks and Relief Regions Based on Acoustic-Emission Parameters, Mekh. Kompozitsionnykh Materialov, 1983, no. 3, pp. 536–543.

  2. Petrov, V.A., Bashkarev, A.Ya, and Nosov, V.V., Prediction of the Efficiency of Metal-Polymeric Machinery Components by Acoustic Emission, Mekh. Kompozitnykh Mater., 1989, no. 2, pp. 354–361.

  3. Nosov, V.V. and Potapov, A.I., About the Choice of the Approach to the Development of Methods for Nondestructive Testing of the Strength of Articles Based on Acoustic Emission, Defektoskopiya, 1996, no. 6, pp. 39–44.

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Authors and Affiliations

  1. Chaplygin Siberian Research Institute of Aviation, ul. Polzunova 21, 630051, Novosibirsk, Russia

    A. N. Ser’eznov, L. N. Stepanova, E. Yu. Lebedev, V. N. Chaplygin, S. A. Katarushkin & V. L. Kozhemyakin

Authors
  1. A. N. Ser’eznov
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  2. L. N. Stepanova
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  3. E. Yu. Lebedev
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  4. V. N. Chaplygin
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  5. S. A. Katarushkin
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  6. V. L. Kozhemyakin
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Additional information

Translated from Defektoskopiya, Vol. 40, No. 9, 2004, pp. 11–18.

Original Russian Text Copyright © 2004 by Ser’eznov, Stepanova, Lebedev, Chaplygin, Katarushkin, Kozhemyakin.

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Ser’eznov, A.N., Stepanova, L.N., Lebedev, E.Y. et al. Studies of the fracture process in composite structural elements based on strain measurements and the acoustic-emission technique. Russ J Nondestruct Test 40, 580–586 (2004). https://doi.org/10.1007/s11181-005-0066-0

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  • DOI: https://doi.org/10.1007/s11181-005-0066-0

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