Abstract
Plasticine long rods were fired at high speed against relatively thick target Plasticine plates, at a wide range of angles of obliquity. The modes of crater development for low obliquity impact ( 0 < θ < 75°, see Fig. 2) are discussed. The ricochet of long rods following on from high obliquity impact ( θ > 75°) which has been studied using high speed photography is also reported. It is suggested that the terminal state of rod after ricochet, i.e. whether it remains intact or is fragmented, is governed primarily by the initial speed of impact. The critical impact speed above which the ricocheting rod is fragmented appears to be closely connected with the hydrodynamic transition velocity of the material.
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