MIL-DTL-46192C(MR)
APPENDIX A
BALLISTIC TESTING OF ALUMINUM ALLOY ARMOR PLATE
A.1 SCOPE. This appendix covers the minimum ballistic limits for acceptable
requirements of aluminum alloy armor, plate, weldable, when tested in accordance
with the provisions of this specification. This Appendix is a mandatory part of
this specification.
A.2
APPLICABLE DOCUMENTS
A.2.1
The following document forms a part of this appendix (see A.5.1):
MIL-STD-662, Test Method Standard V50 Ballistic Test for Armor
(Copies of specifications, standards, handbooks, drawings, publications, and
other Government documents required by contractors in connection with specific
acquisition functions should be obtained from the contracting activity or as
directed by the contracting activity.)
A.3
DEFINITIONS
A.3.1 Fair impact. A fair impact results when an unyawed projectile strikes an
unsupported area of the ballistic test plate sample at such a location that
there is at least two calibers of undisturbed metal between this impact and any
previous impact, hole, crack, edge of plate or spalled area.
A.3.2 Witness plate. A witness plate is normally a 0.014 inch thick sheet of
5052 H36 aluminum alloy (or a 0.020 inch thick sheet of 2024-T3 aluminum alloy
placed 6 inches behind and parallel to the test plates or other ballistic
sample.
A.3.3 Protection complete penetration, CP(P). A protection complete
penetration will have been obtained when the projectile or a fragment of the
projectile or a fragment of the ballistic test plate is thrown beyond the rear
face of the plate with sufficient energy to perforate an approximate 0.020 inch
thick sheet of 2024-T3 aluminum alloy (or a 0.014 inch thick sheet of 5052 H36)
placed parallel to and 6 inches behind the plate.
A.3.4 Partial penetration, PP(P). Any fair impact that is not a complete
penetration should be considered a partial penetration.
A.3.5 Gap. A gap is the difference in fps between the high partial penetration
velocity and the low complete penetration velocity used to compute the ballistic
limit when the high partial penetration velocity is lower than the low complete
penetration velocity.
A.4
REQUIREMENTS
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