Granted Patent B2

US 9,291,437 · App. 13/486,941 · Granted Mar 22, 2016

Abstract

Claims (26)

1. A warhead, comprising:

a liner exhibiting an approximately cylindrical peripheral shape and comprising discrete structures directly physically contacting one another and embedded in a potting material in a repeating pattern configured to form a substantially uniform post-detonation fragmentation pattern, the repeating pattern warped at a single angle θ relative to each of a longitudinal axis of the liner and a direction normal to the longitudinal axis such that no phantom lines extending through centers of adjacent discrete structures of the repeating pattern extend parallel to the longitudinal axis or normal to the longitudinal axis;

a forward bulkhead attached to the liner;

an aft bulkhead attached to the liner; and

an explosive within a cavity at least partially defined by the liner.

2. The warhead of claim 1 , wherein the liner is configured to form explosively formed projectiles from the discrete structures when the explosive is detonated.

3. The warhead of claim 1 , wherein the discrete structures comprise discrete ball bearings arranged in a spiral extending around the longitudinal axis.

4. The warhead of claim 1 , wherein the single angle θ is selected to give a substantially uniform distribution of post-detonation projectiles at a predetermined distance radially from the liner.

5. The warhead of claim 1 , wherein the single angle θ is selected such that the repeating pattern moves in a spiral around the longitudinal axis.

6. The warhead of claim 1 , wherein each of the discrete structures exhibits substantially the same geometric configuration.

7. A method of manufacturing a warhead, comprising:

forming a liner exhibiting an approximately cylindrical peripheral shape and comprising discrete structures directly physically contacting one another and embedded in a potting material in a repeating pattern configured to form a substantially uniform post-detonation fragmentation pattern, the repeating pattern warped at a single angle θ relative to each of a longitudinal axis of the liner and a direction normal to the longitudinal axis such that no phantom lines extending through centers of adjacent discrete structures of the repeating pattern extend parallel to the longitudinal axis or normal to the longitudinal axis;

depositing an explosive within a cavity at least partially defined by the liner;

attaching a forward bulkhead to the liner; and

attaching an aft bulkhead to the liner.

8. The method of claim 7 , wherein forming the liner comprises:

selecting a radial distance from the longitudinal axis;

forming the repeating pattern as a function of the selected radial distance and the shape of the liner to reduce the effects of spoking in the post-detonation fragmentation pattern at a selected distance; and

forming the liner as a function of the repeating pattern.

9. The method of claim 7 , wherein forming the liner comprises forming the repeating pattern as a spiral that extends at the single angle θ from a line on an outside surface of the cylindrical liner parallel to the longitudinal axis.

10. The method of claim 7 , wherein the single angle θ is approximately 15 degrees.

11. A warhead, comprising:

a liner exhibiting an approximately cylindrical peripheral shape and comprising integral and continuous structures exhibiting hexagonal dimples therein and arranged in a repeating pattern configured to form a substantially uniform post-detonation fragmentation pattern, the repeating pattern warped at a single angle θ relative to each of a longitudinal axis of the liner and a direction normal to the longitudinal axis such that no phantom lines extending through centers of adjacent structures of the repeating pattern extend parallel to the longitudinal axis or normal to the longitudinal axis;

a forward bulkhead attached to the liner;

an aft bulkhead attached to the liner; and

an explosive within a cavity at least partially defined by the liner.

Assignments (10)