Acoustic Emission Monitoring of Thin Ply Hybrid Composites Under Repeated Quasi-static Tensile Loading

Fotouhi, M. , Suwarta, P., Jalalvand, M., Czél, G. and Wisnom, M.R. (2016) Acoustic Emission Monitoring of Thin Ply Hybrid Composites Under Repeated Quasi-static Tensile Loading. In: 15th Youth Symposium on Experimental Solid Mechanics (YSESM 15), Rimini, Italy, 8-11 June 2016,

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Abstract

This paper investigates the applicability of the acoustic emission (AE) technique for identification of the damage onset and accumulation in S-Glass/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 S-glass prepreg plies. Analysis of the AE results shows that there are two types of events regarding the AE parameters; those with high values of energy and amplitude, and low values which are assumed to be related to the fragmentation of the carbon layer and delamination of the carbon/glass interface, respectively. 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.

Item Type:Conference Proceedings
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Fotouhi, Dr Mohammad
Authors: Fotouhi, M., Suwarta, P., Jalalvand, M., Czél, G., and Wisnom, M.R.
College/School:College of Science and Engineering > School of Engineering > Aerospace Sciences
Copyright Holders:Copyright © 2016 The Authors

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