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Open Engineering

formerly Central European Journal of Engineering

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Experimental and analytical study of high velocity impact on Kevlar/Epoxy composite plates

1Dept. Of Aerospace Engineering, IIT Madras, Chennai, Tamilnadu, 600036, India

2Defense Metallurgical Research Laboratory, Hyderabad, Andhra Pradesh, India

© 2012 Versita Warsaw. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. (CC BY-NC-ND 3.0)

Citation Information: Open Engineering. Volume 2, Issue 4, Pages 638–649, ISSN (Online) 2391-5439, DOI: 10.2478/s13531-012-0029-x, September 2012

Publication History

Published Online:
2012-09-27

Abstract

In the present study, impact behavior of Kevlar/Epoxy composite plates has been carried out experimentally by considering different thicknesses and lay-up sequences and compared with analytical results. The effect of thickness, lay-up sequence on energy absorbing capacity has been studied for high velocity impact. Four lay-up sequences and four thickness values have been considered. Initial velocities and residual velocities are measured experimentally to calculate the energy absorbing capacity of laminates. Residual velocity of projectile and energy absorbed by laminates are calculated analytically. The results obtained from analytical study are found to be in good agreement with experimental results. It is observed from the study that 0/90 lay-up sequence is most effective for impact resistance. Delamination area is maximum on the back side of the plate for all thickness values and lay-up sequences. The delamination area on the back is maximum for 0/90/45/-45 laminates compared to other lay-up sequences.

Keywords: Kevlar; Epoxy composite plates; Velocity

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