10.14489/td.2017.08.pp.018-025

2017, 08 August

DOI: 10.14489/td.2017.08.pp.018-025

Stepanova L. N., Petrov M. G., Chernova V. V.
ACOUSTIC EMISSION CONTROL OF INELASTIC OF CARBON FIBER REINFORCED PLASTIC SAMPLES WITH VARIOUS MONOLAYER PACKING DURING CYCLIC LOADING
(pp. 18-25)

Abstract. The comparative tests were carried out during the cyclic loading samples of CFRP Т700 with various monolayer packing. The experimentally determined change in the ine-lasticity of the material of the samples with longitudinally oriented load-bearing layers with the addition of intermediate monolayers with diagonal styling and the samples with the orthogonal stacking. In the process of loading have been recorded load and displacement of the stock of the loading machine MTS-100. Depending on the amplitude of loading the influence of the type of monolayers’ stacking on the process of stratification of the CFRP material was analyzed. Information about the defects from the date of their inception to the complete destruction of the samples was automatically recorded using the method of acoustic emission (AE) and strain gauging. The dependences of the main informative parameters of AE signals (a structural coefficient, functionality, amplitude, energy parameter MARSE and dominant frequency) on time were gotten. An algorithm to calculate the inelastic defor-mations at the informative parameters of AE signals localized in the working area of CFRP samples was suggested. It allowed the loading process to set the time at which changed the inelastic properties of carbon fiber, which corresponds to the visible stratification.

Keywords: carbon fiber reinforced plastic (CFRP), monolayer, inelasticity, sample, acoustic emission, structural coefficient, load, strain gauging.

+ - About the Authors Click to collapse

L. N. Stepanova, M. G. Petrov (Federal State Unitary Enterprise “Siberian Aeronautical Research Institute named after S. A. Chaplygin”, Novosibirsk, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра. , Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.
V. V. Chernova (The Siberian Transport University, Novosibirsk, Russia)

+ - References Click to collapse

1. Builo S. I. (2008). Physical-mechanical and statistical aspects of increasing the reliability of the results of acoustic emission control and diagnostics. Rostov-on-Don: SFEDU. [in Russian language]
2. Stepanova L. N., Petrov M. G., Chernova V. V. et al. (2016). Investigation of inelastic properties of carbon fiber reinforced plastic during cycling tests of samples by methods of acoustic emission and strain gauging. Deformatsiya i Razrushenie materialov. (5), pp. 37-41. [in Russian lan-guage]
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5. Stepanova L. N., Ramazanov I. S., Chernova V. V. (2015). Acoustic emission signals structure wavelet analysis while strength tests of carbon fiber samples. Kontrol'. Diagnostika, (7), pp. 54-62. doi: 10.14489/td.2015.07. pp.054-062 [in Russian language]

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