Abstract

The variation of shear strength with impact stress in an alumina‐filled epoxy has been measured with lateral stress gauges. At lower stresses, a degree of hardening behind the shock front has been observed, which diminishes as shock stress increases. It is believed that this is due to a transition from a viscous response dominated by the epoxy matrix, to a more viscoplastic response. The measured shear strength has also been observed to reach a near constant level, as was suggested in a previous paper. We have also used these results to make an estimation of the HEL at ca. 2.0 GPa.

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