The spall behaviour at ultrahigh strain rate (ε ∼ 107 sec-1) of carbon/epoxy unidirectional composites was compared to aluminum and iron using short pulsed laser induced-shock waves. A linear dependence was obtained between plasma ablation pressure for threshold spall conditions and sample thickness.
The threshold for spall damage was estimated to be 1.5 kbar for carbon epoxy unidirec tional composites, 21 kbar for aluminum and 54 kbar for iron.
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2.
Gilath, I., D. Salzmann, M. Givon, M.P. Dariel, L. Kornblith and T. Bar Noy.1988. "Spallation as an Effect of Laser Induced Shock Waves," J. of Materials Science, 23:1825.
3.
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4.
Gilath, I., S. Eliezer, M.P. Dariel and L. Kornblit.1988. "Brittle to Ductile Transition in Laser Induced Spall at Ultra High Strain Rate," Appl. Phys. Letters , 52:1207.
5.
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Gilath, I., S. Eliezer and H. Weisshans.1989. "Damage in 2D Carbon/Carbon Composites by Short Pulsed Laser Induced Shock Waves," J. of Reinforced Plastics and Composites, 8:259.
11.
Guess, T.R.1987. "Kevlar/Epoxy Laminates: Mechanical Response of Asfabricated and Shock Loaded Materials," SAND-87-0620.
12.
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