Communications - Scientific Letters of the University of Zilina 2021, 23(4):B346-B353 | DOI: 10.26552/com.C.2021.4.B346-B353
Investigation of the Impact Strength of the Epoxy-Polyester Material for Using in Aggressive Environments in the Water Transport
- 1 Kherson State Maritime Academy, Kherson, Ukraine
- 2 International Academy of Civil Aviation, Casablanca, Morocco
The influence of the aggressive environments of river water, seawater, oil, petrol and sodium hydroxide on the impact strength of epoxy-polyester composite was investigated. Testing was conducted by two different methods. It was determined that the impact strength of specimens that were kept at air was W' = 4.2 kJ/m2 (by the second method - W'' = 7.0 kJ/m2). The energy spent on destruction of the control specimen was E = 0.92 J. The main regularities of the crack propagation process in the studied material were found and qualitatively described. The time of a crack propagation (τ = 0.16 μs) was determined. The maximum load, which leads to destruction of the specimen was Pmax = 2.47 kN. The comparative analysis of investigated specimens was conducted by the IR-spectroscopy method. It was found, that the biggest decrease in material properties was observed for the specimen that was kept in the petrol environment.
Keywords: epoxy-polyester composite; impact strength; crack initiation; main crack; impact load; IR-spectral analysis
Received: February 21, 2021; Accepted: April 21, 2021; Prepublished online: September 17, 2021; Published: October 1, 2021 Show citation
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