This article studies the perforation of mild steel circular plates struck normally by cylindrical projectiles having blunt, hemispherical, and conical impact faces. Experimental results are obtained using a drop hammer rig for the perforation of 28mm thick plates struck by projectiles weighing between 1.75kg and 176kg and traveling up to about 12ms. The impact positions are at several radial locations across a plate, and it turns out that the perforation energy decreases as the impact location is moved away from a plate center toward the support. It transpires that the projectiles with hemispherical and blunt impact faces require the largest and the smallest impact perforation energies, respectively. Comparisons are made between the experimental results for the perforation energies and the predictions of several empirical equations. Design calculations for the impact perforation of plates could be undertaken using projectiles with blunt impact faces, which would provide a lower bound on the perforation energy of projectiles having hemispherical or conical impact faces, at least within the range of the parameters studied.

1.
Backman
,
M. E.
, and
Goldsmith
,
W.
, 1978, “
The Mechanics of Penetration of Projectiles Into Targets
,”
Int. J. Eng. Sci.
0020-7225,
16
, pp.
1
99
.
2.
Woodward
,
R. L.
, 1984, “
The Interrelation of Failure Modes Observed in the Penetration of Metallic Targets
,”
Int. J. Impact Eng.
0734-743X,
2
(
2
), pp.
121
129
.
3.
Forrestal
,
M. J.
,
Rosenberg
,
Z.
,
Luk
,
V. K.
, and
Bless
,
S. J.
, 1987, “
Perforation of Aluminium Plates With Conical-Nosed Rods
,”
ASME J. Appl. Mech.
0021-8936,
54
(
1
), pp.
230
232
.
4.
Anderson
,
C. E.
, Jr.
, and
Bodner
,
S. R.
, 1988, “
Ballistic Impact: The Status of Analytical and Numerical Modelling
,”
Int. J. Impact Eng.
0734-743X,
7
(
1
), pp.
9
35
.
5.
1990,
High Velocity Impact Dynamics
,
J. A.
Zukas
, ed.,
Wiley
,
New York
.
6.
Goldsmith
,
W.
, 1999, “
Non-Ideal Projectile Impact on Targets
,”
Int. J. Impact Eng.
0734-743X,
22
(
2/3
), pp.
95
395
.
7.
Jones
,
N.
, 1994, “
Low Velocity Perforation of Metal Plates
,”
Shock and Impact on Structures
,
C. A.
Brebbia
and
V.
Sanchez-Galvez
, eds.,
Computational Mechanics
,
Southampton, UK
, Chap. 3, pp.
53
71
.
8.
Corbett
,
G. G.
,
Reid
,
S. R.
, and
Johnson
,
W.
, 1996, “
Impact Loading of Plates and Shells by Free-Flying Projectiles: A Review
,”
Int. J. Impact Eng.
0734-743X,
18
(
2
), pp.
141
230
.
9.
Wen
,
H.-M.
, and
Jones
,
N.
, 1992, “
Semi-Empirical Equations for the Perforation of Plates Struck by a Mass
,”
Structures Under Shock and Impact, II
,
P. S.
Bulson
, ed.,
Computational Mechanics
,
Southampton and Thomas Telford, London
, pp.
369
380
.
10.
Wen
,
H.-M.
, and
Jones
,
N.
, 1994, “
Experimental Investigation Into the Dynamic Plastic Response and Perforation of a Clamped Circular Plate Struck Transversely by a Mass
,”
Proc. Inst. Mech. Eng., Part C: J. Mech. Eng. Sci.
0954-4062,
208
, pp.
113
137
.
11.
Jones
,
N.
, and
Kim
,
S.-B.
, 1997, “
A Study on the Large Ductile Deformations and Perforation of Mild Steel Plates Struck by a Mass—Part 1: Experimental Results
,”
ASME J. Pressure Vessel Technol.
0094-9930,
119
, pp.
178
184
.
12.
Birch
,
R. S.
,
Jones
,
N.
, and
Jouri
,
W. S.
, 1988, “
Performance Assessment of an Impact Rig
,”
Proc. Inst. Mech. Eng., Part C: Mech. Eng. Sci.
0263-7154,
202
, pp.
275
285
;
Birch
,
R. S.
, and
Jones
,
N.
, 1990, “
Corrigenda
,”
Proc. Inst. Mech. Eng., Part C: J. Mech. Eng. Sci.
0954-4062,
204
, p.
8
.
13.
Birch
,
R. S.
, and
Jones
,
N.
, 1990, “
Measurement of Impact Loads Using a Laser Doppler Velocimeter
,”
Proc. Inst. Mech. Eng., Part C: J. Mech. Eng. Sci.
0954-4062,
204
, pp.
1
8
.
14.
Ohte
,
S.
,
Yoshizawa
,
H.
,
Chiba
,
N.
, and
Shida
,
S.
, 1982, “
Impact Strength of Steel Plates Struck by Projectiles: Evaluation Formula for Critical Fracture Energy of Steel Plate
,”
Bull. JSME
0021-3764,
25
(
206
), pp.
1226
1231
.
15.
Yoshizawa
,
H.
,
Ohte
,
S.
,
Kashima
,
Y.
,
Chiba
,
N.
, and
Shida
,
S.
, 1984, “
Impact Strength of Steel Plates Struck by Projectiles: Effect of Mechanical Properties on Critical Fracture Energy
,”
Bull. JSME
0021-3764,
27
(
226
), pp.
639
644
.
16.
Recht
,
R. F.
, and
Ipson
,
T. W.
, 1963, “
Ballistic Perforation Dynamics
,”
ASME J. Appl. Mech.
0021-8936,
30
, pp.
384
390
.
17.
Jones
,
N.
, 1989,
Structural Impact
,
Cambridge University Press
,
Cambridge, England
(Paperback edition, 1997).
18.
Jones
,
N.
, 1986, “
Some Comments on the Dynamic Plastic Behaviour of Structures
,”
Keynote Address, Proceedings International Symposium on Intense Dynamic Loading and Its Effects
,
Z.
Zhemin
and
D.
Jing
, eds.,
Science
,
Beijing, China
, pp.
49
71
and
Pergamon Press
, 1988.
19.
Jouri
,
W. S.
, and
Jones
,
N.
, 1988, “
The Impact Behaviour of Aluminium Alloy and Mild Steel Double-Shear Specimens
,”
Int. J. Mech. Sci.
0020-7403,
30
(
3/4
), pp.
153
172
.
20.
Jones
,
N.
, 2003, “
On the Mass Impact Loading of Ductile Plates
,”
Def. Sci. J.
0011-748X (Def. Res. and Development Org., India),
53
(
1
), pp.
15
24
.
21.
Jones
,
N.
,
Kim
,
S. B.
, and
Li
,
Q. M.
, 1997, “
Response and Failure Analysis of Ductile Circular Plates Struck by a Mass
,”
ASME J. Pressure Vessel Technol.
0094-9930,
119
(
3
), pp.
332
342
.
22.
Corran
,
R. S. J.
,
Shadbolt
,
P. J.
, and
Ruiz
,
C.
, 1983, “
Impact Loading of Plates—An Experimental Investigation
,”
Int. J. Impact Eng.
0734-743X,
1
(
1
), pp.
3
22
.
23.
Shadbolt
,
P. J.
,
Corran
,
R. S. J.
, and
Ruiz
,
C.
, 1983, “
A Comparison of Plate Perforation Models in the Sub-Ordnance Impact Velocity Range
,”
Int. J. Impact Eng.
0734-743X,
1
(
1
), pp.
23
49
.
24.
Jones
,
N.
, 1989, “
Some Comments on the Modelling of Material Properties for Dynamic Structural Plasticity
,”
International Conference on the Mechanical Properties of Materials at High Rates of Strain
,
J.
Harding
, ed.,
Oxford
,
Institute of Physics Conference Series No. 102
, pp.
435
445
.
25.
Liu
,
D.
, and
Stronge
,
W. J.
, 2000, “
Ballistic Limit of Metal Plates Struck by Blunt Deformable Missiles: Experiments
,”
Int. J. Solids Struct.
0020-7683,
37
, pp.
1403
1423
.
26.
Zhang
,
T.
, 1999, “
Failure Map for Thin Ductile Targets by Normal Impact of Conical-Nosed Missiles
,”
Impact Response of Materials and Structures, Proceedings of the Third International Symposium on Impact Engineering
,
V. P. W.
Shim
,
S.
Tanimura
, and
C. T.
Lim
,
Singapore
,
Oxford University Press
,
New York
, pp.
190
195
.
27.
Borvik
,
T.
,
Langseth
,
M.
, and
Hopperstad
,
O. S.
, 2003, “
Ballistic Penetration and Perforation of Steel Plates—An Experimental and Numerical Investigation
,”
Advances in Dynamics and Impact Mechanics
,
C. A.
Brebbia
and
G. N.
Nurick
, eds.,
WIT
,
Southampton
, pp.
181
202
.
28.
Gwaltney
,
R. C.
, 1968, “
Missile Generation and Protection in Light Water-Cooled Power Reactor Plants
,”
Oak Ridge National Laboratory
, Report No. ORNL-USTC-22.
29.
Neilson
,
A. J.
, 1985, “
Empirical Equations for the Perforation of Mild Steel Plates
,”
Int. J. Impact Eng.
0734-743X,
3
(
2
), pp.
137
142
.
30.
Jowett
,
J.
, 1986, “
The Effects of Missile Impact on Thin Metal Structures
,” Report No. UKAEA SRD R378.
31.
Langseth
,
M.
, and
Larsen
,
P. K.
, 1990, “
Dropped Objects’ Plugging Capacity of Steel Plates: An Experimental Investigation
,”
Int. J. Impact Eng.
0734-743X,
9
(
3
), pp.
289
316
.
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