The effect of friction on the structure of surfaces produced during ballistic tests

Examination of damaged surfaces of projectiles and targets after ballistic tests has shown that a fine globular knobbled structure, previously assumed to result from adiabatic shear fracture, is present on a wide range of metallic materials. Experiments have now shown that this structure is associat...

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Bibliographic Details
Published in:Wear 1978-03, Vol.47 (1), p.195-209
Main Authors: De Morton, M.E., Woodward, R.L.
Format: Article
Language:English
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Summary:Examination of damaged surfaces of projectiles and targets after ballistic tests has shown that a fine globular knobbled structure, previously assumed to result from adiabatic shear fracture, is present on a wide range of metallic materials. Experiments have now shown that this structure is associated with rubbing of surfaces at high velocities and occurs as a result of the flash melting of ridges on the grooved surfaces which is due to frictional heating. On the basis of surface energy it is found that break-up of the surface, modelled as a series of ridges, into discrete globules or knobbles is energetically favourable. Estimates of the temperatures attained in various projectile and target materials during penetration and the thickness of the melted films are consistent with observations and measurements on actual projectile and target specimens.
ISSN:0043-1648
1873-2577
DOI:10.1016/0043-1648(78)90215-6