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Journal of Composite Materials
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Spall Behaviour of Carbon Epoxy Unidirectional Composites as Compared to Aluminum and Iron

I. Gilath

Soreq Nuclear Research Center Yavneh 70600 Israel

S. Eliezer

Soreq Nuclear Research Center Yavneh 70600 Israel

S. Shkolnik

Soreq Nuclear Research Center Yavneh 70600 Israel

The spall behaviour at ultrahigh strain rate ({varepsilon} ~ 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.

Key Words: Spall damage • composites • laser induced shock waves • ultrahigh strain rate.

Journal of Composite Materials, Vol. 24, No. 11, 1138-1151 (1990)
DOI: 10.1177/002199839002401102
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