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BY-NC-ND 3.0 license Open Access Published by De Gruyter Open Access March 10, 2015

Flat nose low velocity drop-weight impact response of carbon fibre composites using non-destructive damage detection techniques

Umar Farooq and Peter Myler
From the journal Open Engineering

Abstract

This work is mainly concerned with the nondestructive post-impact damage evaluation of carbon fibre reinforced laminated composite panels subject to low velocity drop-weight impact by flat and round nose impactors. Quasi-isotropic laminates consisting of eight-, sixteen-, and twenty-four plies were impacted by flat and round nose impactors at different velocity levels. Load-time history data were recorded and plotted to correlate loaddrop as damage level to the impactor nose profiles. Test produced data, non-destructive damage detection techniques: visual, ultrasonic, and eddy- current, and computer simulations were utilised to identify and quantify status of the impact induced damage. To evaluate damage in relatively thick laminates (consisting of 24-Ply), the damage ratios and deflection quantities were correlated to the corresponding impactor nose profiles. Damage induced by the flat nose impactor to thick laminates was compared against the data produced by the round nose impactor. Results show that relatively thin laminates were largely affected by the impactor nose. Reasonable difference was observed in damage caused by flat and round impactor nose profiles to thick laminates impacted at relatively higher velocity impacts. Resultswere compared and validated against simulation produced data.

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Received: 2014-5-28
Accepted: 2015-2-2
Published Online: 2015-3-10

©2015 U. Farooq and P. Myler

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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