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Acoustic emission monitoring of thin ply hybrid composites under repeated quasi-static tensile loading

Fotouhi, Mohamad; Suwarta, Putu; Jalalvand, Meisam; Czél, Gergely; Wisnom, R Michael

Authors

Putu Suwarta

Meisam Jalalvand

Gergely Czél

R Michael Wisnom



Abstract

© Faculty of Mechanical Engineering, Belgrade. This paper investigates the applicability of the acoustic emission (AE) technique for identification of the damage onset and accumulation in SGlass/ TR30-Carbon hybrid laminates under repeated quasi-static tensile loading. The samples were made of 2 layers of unidirectional thin carbon prepreg plies which were sandwiched between 2 standard thickness Sglass prepreg plies. Analysis of the AE results shows that there are two types of events regarding energy and amplitude ranges of the AE signals. The signals with low values are found to be related to the delamination of the carbon/glass interface whereas the signals with high values are linked with the carbon layer fragmentation. There are more friction related AE signals during the unloading stage than the loading stage due to collision and rubbing between existing crack faces. Increasing the strain level increases the number of fragmentations and the AE technique is able to quantify this. It is concluded that the AE technique can be used to evaluate the number of fragmentations and can identify the damage evolution of the hybrid laminate under repeated quasi-static tensile loading.

Citation

Fotouhi, M., Suwarta, P., Jalalvand, M., Czél, G., & Wisnom, R. M. (2018). Acoustic emission monitoring of thin ply hybrid composites under repeated quasi-static tensile loading. https://doi.org/10.5937/fmet1802238F

Journal Article Type Article
Acceptance Date Dec 28, 2017
Publication Date Jan 1, 2018
Journal FME Transactions
Print ISSN 1451-2092
Peer Reviewed Peer Reviewed
Volume 46
Issue 2
Pages 238-244
DOI https://doi.org/10.5937/fmet1802238F
Keywords carbon/glass hybrid, pseudo ductility, acoustic emission,
fragmentation, delamination
Public URL https://uwe-repository.worktribe.com/output/873984
Publisher URL http://www.mas.bg.ac.rs/istrazivanje/fme/start

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