Title: Digital image correlation of low velocity impact on glass/epoxy composite

Authors: K.K. Namala; P. Mahajan; N. Bhatnagar

Addresses: Department of Applied Mechanics, Indian Institute of Technology, New Delhi 110016, India ' Department of Applied Mechanics, Indian Institute of Technology, New Delhi 110016, India ' Department of Mechanical Engineering, Indian Institute of Technology, New Delhi 110016, India

Abstract: Low Velocity Impact (LVI) experiments were performed on unidirectional laminate [0°]8 and cross-ply laminate [0°/90°]4 of e-glass/epoxy composite of thickness of 6.4 mm for incident energies 6.9 J, 9.48 J and 12.7 J. The energy, contact forces and displacement plots with respect to time are studied for drop test. The damage observed as back face signature on the back face of both cross-ply and unidirectional laminate are plotted. The composite was speckled randomly and the impact phenomenon was recorded by using a high-speed camera. The DIC data was analysed to obtain displacement and strains on the surface of the plate.

Keywords: digital image correlation; low velocity impact; damage threshold level; glass/epoxy composites; unidirectional laminates; cross-ply laminates; energy; contact forces; displacement plots; vehicle safety; strain.

DOI: 10.1504/IJVS.2014.063263

International Journal of Vehicle Safety, 2014 Vol.7 No.3/4, pp.327 - 344

Published online: 08 Jul 2014 *

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