Fracture/severance of materials

Details Fracture/severance of materials Fracture/severance of materials

1995-04-04

1998-07-14

Nelson, Peter A.

Ammunition and explosives

Blasting

Terrain clearance

102303, 1022758, F42D 300

Patent

active

057807639

ABSTRACT:
A method for severing or weakening materials. Explosive cords are placed in grooves on the upper surface of the material to be severed or weakened. The explosive cords are initiated simultaneously to introduce explosive shock waves into the material. These shock waves progress toward the centerline between the explosive cords and the lower surface of the material. Intersecting and reflected waves produce a rarefaction zone on the centerline to fail the material in tension. A groove may also be cut in the lower surface of the material to aid in severing or weakening the material.

REFERENCES:
patent: 3491847 (1970-01-01), Abbott
patent: 4488486 (1984-12-01), Betts
patent: 5524546 (1996-06-01), Rozner et al.
patent: 5650588 (1997-07-01), Nakajima

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