Failure Progress of 3D Reinforced GFRP Laminate during Static Bending, Evaluated by Means of Acoustic Emission and Vibrations Analysis

Materials

Mateusz Koziol¹  Tomasz Figlus² 

[1] Faculty of Materials Engineering and Metallurgy, Silesian University of Technology, ul. Krasinskiego 8, 40-019 Katowice, PolandFaculty of Transport, Silesian University of Technology, ul. Krasinskiego 8, 40-019 Katowice, Poland;

关键词: glass fibre reinforced polymer laminate;    3D reinforcement;    failure analysis;    signal analysis;    vibrations analysis;    acoustic emission;   

DOI  :  10.3390/ma8125490

来源: mdpi

【 摘 要 】

The work aimed to assess the failure progress in a glass fiber-reinforced polymer laminate with a 3D-woven and (as a comparison) plain-woven reinforcement, during static bending, using acoustic emission signals. The innovative method of the separation of the signal coming from the fiber fracture and the one coming from the matrix fracture with the use of the acoustic event’s energy as a criterion was applied. The failure progress during static bending was alternatively analyzed by evaluation of the vibration signal. It gave a possibility to validate the results of the acoustic emission. Acoustic emission, as well as vibration signal analysis proved to be good and effective tools for the registration of failure effects in composite laminates. Vibration analysis is more complicated methodologically, yet it is more precise. The failure progress of the 3D laminate is “safer” and more beneficial than that of the plain-woven laminate. It exhibits less rapid load capacity drops and a higher fiber effort contribution at the moment of the main laminate failure.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.