Abstract
The results of testing samples made of T700 carbon fiber reinforced plastic with a stress concentrator in the form of a hole 14 mm in diameter are considered. Some of the samples were heated to a temperature of +100°C, followed by exposure to a static tensile load, with the remaining samples statically loaded at a temperature of +20°C. In the process of loading, information was recorded using the method of acoustic emission. At first, the samples were loaded statically up to 50 kN, which was 50% of the average breaking load. Then the load was increased in increments ΔP = 10 kN until sample failure. It was observed that the simultaneous exposure of samples to static and heat loads decreased the load capacity of the samples.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Kablov, E.N., Startsev, O.V., Krotov, A.S., et al., Climatic aging of composite materials for aviation purposes. I. Mechanisms of aging, Deform. Razrushenie Mater., 2010, no. 11, pp. 19–27.
Stepanova, L.N., Bataev, V.A., and Chernova, V.V., Studying the failure of a CFRP sample under static loading by the acoustic-emission and fractography methods, Russ. J. Nondestr. Test., 2017, vol. 53, no. 6, pp. 422–429.
Barsuk, V.E., Stepanova, L.N., and Kabanov, S.I., Acoustic emission control of defects during static testing of the structure of a composite aircraft, Kontrol’ Diagn., 2018, no. 4, pp. 14–19.
Cardoni, M., Gianneo, A., and Giglio, M., A low frequency Lamb waves based structural health monitoring of an aeronautical carbon fiber reinforced polymer composite, J. Acoust. Emiss., 2014, vol. 32, pp. 1–20.
Antyufeeva, N.V., Aleksashin, V.M., and Stolyankov, Yu.V., Modern methodological support of thermoanalytical studies of polymer composites and prepregs, Kompoz. Nanostrukt., 2014, vol. 6, no. 3, pp. 176–184.
Nikolaev, V.P., Myshenkova, E.V., Pichugin, V.S., et al., Effect of temperature on mechanical properties of composite materials, Zavod. Lab., Diagn. Mater., 2013, no. 4, pp. 58–61.
Segui, J., Protecting aircraft composites from lightning strike damage. www.comsol.com. Cited November 6, 2015.
Ser’eznov, A.N., Stepanova, L.N., Kabanov, S.I., et al., Akustiko-emissionnyi kontrol’ aviatsionnykh konstruktsii (Acoustic Emission Testing of Aircraft Structures), Stepanova, L.N., Ser’eznov, A.N., Eds., Moscow: Mashinostroenie-Polet, 2008.
Aljets, D., Acoustic emission source location in composite aircraft structures using modal analysis, Ph. D. Dissertation, Univ. Glamorgan, 2011.
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © L.N. Stepanova, V.V. Chernova, E.S. Petrova, I.S. Ramazanov, 2018, published in Defektoskopiya, 2018, No. 11, pp. 9–16.
Rights and permissions
About this article
Cite this article
Stepanova, L.N., Chernova, V.V., Petrova, E.S. et al. Acoustic-Emission Testing of Failure in Samples of CFRP Exposed to Static and Heat Loads. Russ J Nondestruct Test 54, 748–756 (2018). https://doi.org/10.1134/S1061830918110098
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1061830918110098