• Jan 21, 2020 News! Vol.11, No.1- Vol.11, No.3 has been indexed by EI(Inspec)!   [Click]
  • Aug 21, 2020 News!Vol.12, No. 3 has been published with online version.   [Click]
  • Feb 08, 2017 News!Welcome Assoc. Prof. Lei Chen from China to join the Editorial board of IJET.   [Click]
General Information
    • ISSN: 1793-8236 (Online)
    • Abbreviated Title Int. J. Eng. Technol.
    • Frequency:  Quarterly 
    • DOI: 10.7763/IJET
    • Executive Editor: Ms.Yoyo Y. Zhou
    • Abstracting/ Indexing: Chemical Abstracts Services (CAS) EBSCO, Google Scholar, Ulrich Periodicals Directory, Crossref, ProQuest, Index CopernicusEI (INSPEC, IET).
    • E-mail: ijet@vip.163.com
Prof. T. Hikmet Karakoc
Anadolu University, Faculty of Aeronautics and Astronautics, Turkey

IJET 2009 Vol.1(1): 63-66 ISSN: 1793-8236
DOI: 10.7763/IJET.2009.V1.11

AE Waveform Analysis of Delamination in GFRP Composite Materials during Drilling

A. Sudha J., B. Sampathkumar S. and C. Vijaya A
Abstract—Fiber reinforced plastics have been widely used for manufacturing aircraft and spacecraft structural parts because of their particular mechanical and physical properties such as high strength to weight ratio and also stiffness. Drilling of these composite materials can be considered as a critical operation owing to their tendency to delaminate when subjected to mechanical stresses. With regard to the quality of machined component, the principal drawbacks are related to surface delamination, fiber / resin pull out and inadequate surface roughness of the hole wall. Among the defects caused by drilling, delamination appears to be the most critical. Delamination is responsible for the rejection of approximately 60% of the components produced in the aircraft industry (Khasabha, 2004). Therefore, it is very important to detect the delamination undergone by the composite material. This necessitates an online technique, which can be used to monitor and measure the delamination as it occurs. Acoustic emission (AE), an online monitoring tool, is ideally suited for this purpose. The work discusses the experimental investigations carried out on Glass Fiber reinforced plastic (GFRP) composite specimens in which the acquired AE data is analysed. AE waveform obtained during drilling of GFRP composites are analysed and presented. The results clearly indicate that AE parameters as well as AE waveforms can be used to identify the optimum cutting condition on drilling glass fiber reinforced composite laminate and also can be used for monitoring the drilling process.

Index Terms—AE, GFRP, Delamination, Drilling, Waveform

A. Research Scholar, Department of Production Technology, MIT, Anna University, Chromepet, Chennai-44
B. Professor, Department of Production Technology, MIT, Anna University, Chromepet, Chennai-44
C. Lecturer, SRM University, Chennai., Tamilnadu, India


Cite:Sudha J., Sampathkumar S. and Vijaya A, "AE Waveform Analysis of Delamination in GFRP Composite Materials during Drilling," International Journal of Engineering and Technology vol.1, no.1, pp. 63-66, 2009.
Copyright © 2008-2020. International Journal of Engineering and Technology. All rights reserved. 
E-mail: ijet@vip.163.com