10.14489/td.2018.11.pp.004-013

2018, 11 November

DOI: 10.14489/td.2018.11.pp.004-013

Stepanova L. N., Chernova V. V., Kabanov S. I.
ANALYSIS OF THE MODE COMPOSITION OF THE ACOUSTIC EMISSION SIGNALS WITH SIMULTANEOUS THERMAL AND STATIC LOADING OF SPECIMENS OF CARBON FIBER T800
(pp. 4-13)

Abstract. Using the method of acoustic emission (AE), two groups of samples with dimensions of 6001000,9 mm and laying of nine monolayers were studied [±45/90/O3/90/±45] prepreg Torayca T800. In the center of each sample there was a hole with a diameter of 12 mm, which was a voltage concentrator. The first group, consisting of five samples, was heated in their middle part by temperatures (20, 40...100 °C). Calibration was performed using an electronic simulator, which was subsequently connected to each piezoelectric sensor. For this group of samples, the sound velocity and the digital correlation coefficient were calculated for the AE signals propagating along and across the sample heated to a certain temperature. Dispersion curves were constructed using wavelet transforms and the arrival time of the fast S0 and slow A0 modes of AE signals was determined.The second group consisted of eight samples. Three samples were loaded from 10 kN to failure at 20 °C. Five samples were heated to 100 °C and also loaded from 10 kN to failure. For this group of samples, the location of the AE, fast S0 and slow A0 modes signals is performed. The modal composition of AE signals was estimated by the value of the structural coefficient.

Keywords: sample, carbon fiber, static and thermal loading, acoustic emission, non-destructive testing, mode, error, location.

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L. N. Stepanova (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.
V. V. Chernova (Siberian Transport University, Novosibirsk, Russia) E-mail: с Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.
S. I. Kabanov (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.

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