High performance composite shaped charge

• US 5,792,977 A
• Filed: 06/13/1997
• Issued: 08/11/1998
• Est. Priority Date: 06/13/1997
• Status: Expired due to Term

• Current Assignee: Western Atlas International Incorporated (Northrop Grumman Corporation)
• Original Assignee: Western Atlas International Incorporated (Northrop Grumman Corporation)
• Inventors: Chawla, Manmohan S.
• Primary Examiner(s): Nelson, Peter A.
• Application Number:
  US08/874,759
• Time in Patent Office: 424 Days
• Field of Search: 102/307, 102/309, 102/476
• US Class Current: 102/307
• CPC Class Codes: F42B 1/028 characterised by the form of the liner
• CPC Class Codes: F42B 1/032 characterised by the material of the liner

Abstract

A shaped charge for efficiently transferring energy from an explosive material to generate a deep penetrating jet. The shaped charge liner is formed with a hemispherical first section combined with an elongated second section. The liner second section can be formed as a truncated cone, trumpet, or other shape. The hemispherical first section collapses to generate a high velocity jet portion, and the second section collapses to generate an elongated, deep penetrating jet portion which follows the higher velocity jet portion.

Claims

1. A shaped charge activatable by a detonator to generate a deep penetration jet, comprising:

a housing;

a recess defined by an inner housing surface within said housing, wherein said recess has an open end and a closed end;

a high explosive within said recess which is activatable by the detonator to generate a detonation wave; and

a liner having a first section substantially formed as a hemisphere collapsible by said detonation wave to form a first penetration jet segment moving in a selected direction, wherein said liner further has a proximate second section between said first section and said recess open end which is collapsible by said detonation wave to form a second penetration jet segment moving in said selected direction for cooperating with said first penetration jet segment to form the deep penetration jet.

2. A shaped charge as recited in claim 1, wherein said liner second section is attached to said liner first section.

3. A shaped charge as recited in claim 1, wherein said second liner section is attached to said liner first section substantially near the equator of said liner first section.

4. A shaped charge as recited in claim 1, wherein said liner second section is shaped as a truncated cone.

5. A shaped charge as recited in claim 1, wherein said liner second section is shaped as a truncated trumpet.

6. A shaped charge as recited in claim 1, wherein said liner second section has a shape providing a greater surface area facing said recess open end than a truncated cone shaped liner second section located in the same position between said liner first section and said recess open end, for maximizing the mass of said liner second section between said liner first section and said recess open end.

7. A shaped charge as recited in claim 1, wherein said the detonator causes the detonation wave to simultaneously impact said first liner section.

8. A shaped charge as recited in claim 1, further comprising a liner third section between said liner second section and said recess open end.

9. A shaped charge as recited in claim 1, further comprising a multi-point initiating mechanism for detonating said high explosive.

10. A shaped charge for extending the length of a material penetrating jet, comprising:

a housing;

a recess defined by an inner housing surface within said housing, wherein said recess has an open end and a closed end;

a high explosive within said recess which is activatable by the detonator to generate a detonation wave;

a first liner section substantially formed as a hemisphere having an apex and having a second end between said apex and said recess open end, wherein said first liner section is collapsible by said detonation wave to form a first penetration jet segment moving in a selected direction; and

a second liner section between said first liner section second end and said recess open end, wherein said second liner section comprises a different material than said first liner section and is collapsible by said detonation wave to form a second penetration jet segment moving in said selected direction for cooperating with said first penetration jet segment to form the deep penetration jet.

11. A shaped charge as recited in claim 10, wherein said first liner section is simultaneously collapsible with said second liner section, and wherein said first penetration jet segment leads said second penetration jet segment.

12. A shaped charge as recited in claim 10, wherein said second liner section is generally shaped as a truncated cone.

13. A shaped charge as recited in claim 10, wherein said second liner section is generally shaped as a truncated trumpet.

14. A shaped charge as recited in claim 10, wherein said second liner section is formed with a material having a different density than the material forming said first liner section.

15. A shaped charge as recited in claim 11, wherein said second end is formed with material having a different density than the material forming said first end.

16. A shaped charge as recited in claim 11, wherein said housing is substantially cylindrical, further comprising an insert within said housing recess for defining a hemispherical surface having a radius substantially equal to the radius of said liner first section.