SERIOUS discrepancies and considerable variations have been observed in the numerous empirical, semi-empirical, and theoretical equations which have been proposed to describe craters formed in metal targets as a result of hyper-velocity impact1. These inconsistencies in the mathematical models can be attributed to a paucity of precise engineering data and to a basic disagreement about the mechanism of impact. One group of experimenters has attempted to relate the extent of hyper-velocity damage to the mechanical properties of the impacted target; another group has stressed the hydrodynamic model of cratering.
Hermann, W., and Jones, A. H., “Survey of Hypervelocity Impact Information”, A.S.T.I.A., 267, 289 (September 1961).
Atkins, W. W., and Halperson, S. M. (personal communication).
Piacesi, R. (personal communication).
Nunes, J., and Larson, F. R., Amer. Soc. Testing Mat. Proc., 61, 1349 (1961).
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ROLSTEN, R. True Stress to Fracture and Hyper-velocity Crater Depth. Nature 207, 1182 (1965). https://doi.org/10.1038/2071182a0