Technical Diagnostics and Non-Destructive Testing, 2019, №03



2019 №03 (06)

DOI of Article 10.15407/tdnk2019.03.07

2019 №03 (08)

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Technical Diagnostics and Non-Destructive Testing #3, 2019, pp. 46-54
 

Application of acoustic emission and strain gaugez measurements to processes of diagnostics of strain hardening of epoxy matrix composites

V.L. Aleksenko¹, A.A. Sharko², S.A. Smetankin¹, D.M. Stepanchikov², K.Yu. Yurenin¹

¹Kherson State Maritime Academy. 20 Ushakova Ave., 73000, Kherson, Ukraine. E-mail: ksma@ksma.ks.ua
²Kherson National Technical University. 24 Berislav Rd., 73008, Kherson, Ukraine. E-mail: kntu@kntu.net.ua
 
Abstract:
The paper gives the results of studying the dependence of acoustic emission arising at deformation of samples of epoxy resin ED-20, using the developed hardware-software complex, reflecting the evolution of physical deformation mechanisms at sample loading. Regularities of formation of acoustic emission and strain gauge diagnostic signals during deformation at four-point bending were established. Recorded signals were processed in real time. Acoustic emission was described using signal informative parameters, reflecting its energy and frequency features. Stresses at which material fracture begins were determined, which were matched by the level of force impact. Derived results and regularities can be applied at acoustic emission studies of the stages of plastic deformation in epoxy matrix composites.  Ref. 10, Tables 2, Fig. 8.
Keywords: acoustic emission, strain gauge measurement, epoxy matrix, four-point bending
 
Received: 21.08.2019
Published: 05.09.2019
 

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