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Journal of Reinforced Plastics and Composites
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Impactor Mass Effects in Glass–Epoxy Composites Subjected to Repeated Drop Tests

B. S. Sugun

Fibre Reinforced Plastics Division, National Aerospace Laboratories, Airport Road, Bangalore – 560 017, India

R. M. V. G. K. Rao

Fibre Reinforced Plastics Division, National Aerospace Laboratories, Airport Road, Bangalore – 560 017, Indiarmvgk{at}yahoo.com

Experimental studies were carried out to understand the impactor mass effects on glass–epoxy composites using an instrumented impact machine (DYNATUP 8250) under low-velocity test conditions. Repeated drop tests were carried out at pre-determined energy levels for selective mass height combinations. Number of drops to failure (Nf) was chosen as the damage criterion.

Analysis of test results clearly showed that, at low incident energies, heavier impactors caused more damage to the laminates as reflected by their lower number of drops to failure. This effect diminished gradually at relatively higher incident energies.

Key Words: repeated drop tests • glass–epoxy composites • impactor mass effects • Ein • Nf values

Journal of Reinforced Plastics and Composites, Vol. 23, No. 14, 1547-1560 (2004)
DOI: 10.1177/0731684404039797
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