Shaped Explosive Charge Including Having a Lower Explosive Charge to Liner Mass Ratio

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Existing shaped charges that are designed for applications such as breaching rock or concrete have a variety of disadvantages. The charges can be too small or too large to generate the desired or needed effect. A number of small charges, such as oil well perforators, can penetrate into rock, but only generate very small holes that are less than ¼ inch. Other specialized charges can penetrate but have unacceptably large loads. A charge shaped for specific applications is needed with minimized explosive, reduced primary fragments, and decreased liner residue.

Naval Surface Warfare Center, Crane Division (NSWC Crane), has designed and patented a shaped charge to meet these needs that has a lower explosive charge to liner mass ratio. The design includes a wave shaper, charge, and a metal liner. The wave shaper manipulates the shock front so that the interaction of the explosive and the line occurs lower along the liner profile. The metal or composite liner provides the mass necessary to generate large diameter holes. The invention has a lower explosive to mass ratio of less than 3:1 or 2:1 which reduces the weight and needed amount of explosive. The soft composite liner ensures that the resulting hole is not plugged with debris.
Utility Patent
United States
Mar 22, 2016
Purdue Office of Technology Commercialization
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