Bless and Barber (1) ‖ have shown that rod projectiles can be affected by the propagation of bending deformation along their lengths when they strike rigid targets at sub-ordnance velocities. Experiments are described in which a range of different modes of deformation are identified for both normally and obliquely incident steel and aluminium rods of length to diameter ratio 24 : 1. The results are discussed from the point of view of classical dynamic structural plasticity.
Get full access to this article
View all access options for this article.
References
1.
BlessS. J.BarberJ. P. ‘Bending waves in yawed rod impacts’, J. Ballistics, 1978, 2, 281–298.
2.
BackmanM. E.GoldsmithW. ‘The mechanics of penetration of projectiles into targets’, Int. J. Engng Sci., 1978, 16, 1–99.
3.
MiseyJ. J. ‘Analysis of long rod penetration at hyper-velocity impact’, AIAA Jl, 1977, 15, 1696–1698.
4.
TateA. ‘A simple estimate of the minimum target obliquity required for the ricochet of a high speed long rod projectile’, J. Phys. D. Appl. Phys., 1979, 12, 1825–1829.
5.
ParkesE. W. ‘The permanent deformation of a cantilever struck transversely at its tip’, Proc. R. Soc. A, 1955, 228, 462–476.
6.
DaneshiG. H.JohnsonW. ‘The ricochet of spherical projectiles of sand’, Int. J. mech. Sci., 1977, 19, 491–497.
7.
AbrahamsonG. R.GoodierJ. N. ‘Dynamic flexural buckling of rods within an axial plastic compression wave’, J. appl. Mech, 1966, 88, 241–247.
8.
LeeE. H.WolfH. ‘Plastic wave propagation in high speed testing’, J. appl. Mech., 1951, 73, 379–386.
9.
TaylorG. I. ‘The use of flat-ended projectiles for determining dynamic yield stress, 1: Theoretical consideration’, Proc. R. Soc. A, 1948, 194, 289–299.
10.
LeeE. H.SymondsP. S. ‘Large plastic deformations of beams under transverse impact’, J. appl. Mech., 1952, 74, 308–314.
11.
EzraA. A. ‘The plastic response of a simply supported beam to an impact load at the center’, Proceedings of the 3rd U. S. National Congress on Applied Mechanics, 1958, pp 513–520.
12.
SymondsP. S. ‘Plastic shear deformations in dynamic load problems’, in Engineering Plasticity, 1968, pp. 647–664 (Cambridge University Press).
