EP0437992A1 - Sprengladung zum Bilden mehrerer Bolzen und/oder Stacheln - Google Patents

Sprengladung zum Bilden mehrerer Bolzen und/oder Stacheln Download PDF

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Publication number
EP0437992A1
EP0437992A1 EP90403485A EP90403485A EP0437992A1 EP 0437992 A1 EP0437992 A1 EP 0437992A1 EP 90403485 A EP90403485 A EP 90403485A EP 90403485 A EP90403485 A EP 90403485A EP 0437992 A1 EP0437992 A1 EP 0437992A1
Authority
EP
European Patent Office
Prior art keywords
coatings
explosive charge
charge
covers
charge according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP90403485A
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English (en)
French (fr)
Other versions
EP0437992B1 (de
Inventor
Richard Durand
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giat Industries SA
Original Assignee
Direction General pour lArmement DGA
Giat Industries SA
Etat Francais
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Direction General pour lArmement DGA, Giat Industries SA, Etat Francais filed Critical Direction General pour lArmement DGA
Publication of EP0437992A1 publication Critical patent/EP0437992A1/de
Application granted granted Critical
Publication of EP0437992B1 publication Critical patent/EP0437992B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B1/00—Explosive charges characterised by form or shape but not dependent on shape of container
    • F42B1/02—Shaped or hollow charges
    • F42B1/032—Shaped or hollow charges characterised by the material of the liner
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B1/00—Explosive charges characterised by form or shape but not dependent on shape of container
    • F42B1/02—Shaped or hollow charges
    • F42B1/028—Shaped or hollow charges characterised by the form of the liner

Definitions

  • the technical sector of the present invention is that of explosive charges generating jets or cores, intended for piercing the armor of armored vehicles.
  • US-A-4,702,171 describes a two-layer coating, one of which generates a jet and the other a core. These coatings are attached contiguously over a portion of their surface and their impedance to shocks decreases from the outside to the inside. In addition, the charge described does not generate two jets or cores, but a continuous assembly as shown in Figure 2 of this patent.
  • US-A-4,498,367 describes a charge with two coatings generating a single high energy jet.
  • the internal coating, on the explosive side has greater ductility than that of the external coating and these two coatings are positioned contiguously.
  • the shock impedance decreases from the outside to the inside (explosive charge side).
  • the proposed invention relates to an architectural evolution of the charges generating nuclei and / or jets moving away from the three axes of force mentioned above; it significantly increases the potential for aggression of these charges on current or future armor.
  • the invention therefore relates to an explosive charge generating cores and / or jets, comprising n coating, n being a number between 2 and 5, and an explosive charge initiated by a priming device, characterized in that the coatings are placed contiguously, the relative distance between the two coatings being between approximately 0.1 mm and 0.11 gauge and in that the materials have an equal or decreasing impact impedance from the inside, on the explosive charge side, outward, free surface side.
  • the coatings can be in the form of caps with surfaces of revolution generated by a conical curve and whose convexity is directed towards the explosive charge.
  • conical curve is meant a sphere, an elispsoid, a paraboloid, etc.
  • the distance may decrease from the edges to the center of the coverings.
  • the average thickness of the coatings expressed in load rating can be between 0.01 / n and 0.15 / n, n being the number of coatings.
  • Each coating consists of a unique metal or alloy.
  • the coatings can be produced from metals or metal alloys selected from the group consisting for example of uranium, tantalum, nickel, copper and iron.
  • the filler can comprise two coatings, the internal and external coatings being constituted respectively by tantalum and iron.
  • the two coatings can be spaced a constant distance of 0.1 mm.
  • the internal and external coatings can each have a thickness of the order of 2.5% of the size of the load.
  • the load can comprise three coatings constituted respectively from the inside to the outside by tantalum, copper and iron.
  • An advantage of the present invention lies in the fact that in the aggression of inert targets, such a charge makes it possible to combine (at least at short and medium action distance, around 100 calibers) the effects of several nuclei and to obtain a perforation of greater depth, than with a conventional load.
  • Another advantage lies in the fact that during the aggression of targets over-protected by inert or reactive elements, the effects of a tandem charge are obtained: the first nucleus destroys the first over-protection, which allows the nuclei following to attack the remaining part of the target.
  • Another advantage lies in the integration in an ammunition to thus present a mass and a compact size, compared to those of a conventional tandem load.
  • Tandem charges of interest mainly only in the attack of multi-stage protections (two stages for a charge with two cores), if one of the stages is difficult to destroy with a nucleus, it is then attacked with a jet.
  • a double generation charge of cores has been represented, consisting of a safety and ignition device 1 to initiate a ignition relay 2 which amplifies in power and stabilizes in form and speed the detonating signal coming from of device 1.
  • This relay 2 can possibly integrate a wave shaping device, such as a screen.
  • Relay 2 is followed by an explosive charge 3 which is put into detonic mode by the signal which relay 2 delivers and which has the role of propelling the bi-layer coating 4 and 5.
  • This two-layer coating generates two cores corresponding to the two elementary coatings 4 and 5 constituting it.
  • the entire structure described is integrated inside a metal casing 6 of conventional type.
  • the two coatings 4 and 5 are spaced from each other, for example, by an air gap 7 whose thickness is between approximately 0.1 mm and 0.11 caliber of the load.
  • the coating 4 is constituted by tantalum and the coating 5 by iron.
  • the distance separating the two coatings can be constant or even be greater at the periphery than at the centers of the coatings.
  • the free volume existing between the two coatings can be occupied for example by an organic material. This material can be an adhesive.
  • FIG 2 there is shown a load comprising three coatings 8, 9, and 10, spaced from each other by successive air knives 11 and 12, the other elements of the structure being identical.
  • the two coatings 8 and 9 are separated from each other by the air gap 11 whose thickness is constant and between 0.1 mm and 0.11 caliber of the load.
  • the coating 8 is constituted by tantalum and the coating 9 by copper.
  • the two coverings 9 and 10 are separated from each other by the air gap 12 whose thickness decreases from the periphery towards the center of these coatings from a value b, to a value a, such as 0.1 mm ⁇ a ⁇ b ⁇ 0.11 caliber.
  • the coating 10 consists of iron.
  • the volumes existing between the coatings 8 and 9 on the one hand and 9 and 10 on the other hand can be occupied for example by an organic material. This material can be an adhesive.
  • FIG. 3 illustrates the operation of a load with two coatings.
  • the two cores 13 and 14 formed respectively from the coatings 5 and 4. They are separated after a time of the order of 500 ⁇ s from a distance of 60 mm.
  • the detonation wave induces in the first elementary coating 4 a shock which, in a diagram "pressure P, particle velocity u", is determined by the intersection of the dynamic adiabatic of the detonation products of l explosive of loading 3 and of the Hugoniot curve of the material of the elementary coating 8 (point of coordinates P1, u1).
  • the shock moves towards the interface of the elementary coatings 4 and 5 by compressing the medium it crosses and bringing it to the pressure P1 and to the particle speed u1.
  • the shock is transmitted to the second elementary coating 5 by compressing it; its constituent material, since it has a shock impedance lower than that of the material of the first elementary coating 4, is crossed by the shock at the pressure P′2 less than P1 and at the particle speed u′2 greater than u1.
  • the pressure P′2 and the particle speed u′2 are slightly altered values by passing the shock through the volume at constant thickness 7 of the pressure P2 and the particle speed u2 (P2 and u2 are graphically given in the diagram " pressure, particle velocity "by the intersection of the symmetrical curve with respect to the line parallel to the pressure axis passing through the point (P1, u1) of the Hugoniot curve of the first elementary coating 4 and of the curve d 'Hugoniot of the second elementary covering 5).
  • the equilibrium state is reached in elementary coatings generally after several tens of microseconds; the time to reach the equilibrium state corresponds to the time necessary for the cancellation of the pressure in the materials due to the recombinations of the compression and expansion waves which circulate there.
  • the first elementary coating 4 moves and deforms according to its own characteristics (geometric, metallurgical %) and the energy communicated to it during the initial impact and also by the detonation products generated by the explosive.
  • the second elementary coating 5 moves and deforms as a function of its own characteristics and of the energy communicated to it by the first elementary coating 4.
  • the shock wave is transmitted to the elementary coatings 8, 9 and 10 by compressing them.
  • the material constituting the third coating since it has a lower shock impedance than that of the material of the second elementary 9, is crossed by a shock at the pressure P′3 lower than P′2 and at the particle speed u′3 greater than u′2.
  • the pressure P′3 and the particle speed u′3 are the values slightly altered by passing the shock through the air gap 12 of variable thickness of the pressure P3 and the particle speed u3 (P3 and u3 are graphically given in a "pressure, particle velocity" diagram by the intersection of the symmetrical curve with respect to the line parallel to the pressure axis passing through the point (P2, u2) of the Hugoniot curve of the second elementary covering 9 and of the Hugoniot curve of the third elementary covering 10).
  • the third elementary covering 10 moves and deforms as a function of its own characteristics and of the energy communicated to it by the second elementary covering 9.
EP19900403485 1989-12-07 1990-12-07 Sprengladung zum Bilden mehrerer Bolzen und/oder Stacheln Expired - Lifetime EP0437992B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8916214A FR2655719B1 (fr) 1989-12-07 1989-12-07 Charge explosive engendrant plusieurs noyaux et/ou jets.
FR8916214 1989-12-07

Publications (2)

Publication Number Publication Date
EP0437992A1 true EP0437992A1 (de) 1991-07-24
EP0437992B1 EP0437992B1 (de) 1993-09-15

Family

ID=9388270

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900403485 Expired - Lifetime EP0437992B1 (de) 1989-12-07 1990-12-07 Sprengladung zum Bilden mehrerer Bolzen und/oder Stacheln

Country Status (4)

Country Link
EP (1) EP0437992B1 (de)
DE (1) DE69003374T2 (de)
ES (1) ES2046746T3 (de)
FR (1) FR2655719B1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5279228A (en) * 1992-04-23 1994-01-18 Defense Technology International, Inc. Shaped charge perforator
GB2303687A (en) * 1995-07-27 1997-02-26 Western Atlas Int Inc Shaped charges
US5633475A (en) * 1996-03-08 1997-05-27 Western Atlas International, Inc. Circulation shaped charge
US6035785A (en) * 1997-02-06 2000-03-14 Giat Industries Explosively-formed charge with attachment means between the liner and the casing
US6250229B1 (en) * 1996-04-02 2001-06-26 Giat Industries Performance explosive-formed projectile
WO2006054081A1 (en) * 2004-11-16 2006-05-26 Qinetiq Limited Improvements in and relating to oil well perforators
US20130284441A1 (en) * 2011-06-08 2013-10-31 James E. Brooks Downhole severing tool

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3628622C1 (de) * 1986-08-22 1996-08-08 Fraunhofer Ges Forschung Vorrichtung zur Erzeugung sprenggeformter Projektile
FR2866701A1 (fr) 2004-02-20 2005-08-26 Giat Ind Sa Charge formee generatrice de plusieurs noyaux
DE102005057254B4 (de) * 2005-12-01 2007-07-26 TDW Gesellschaft für verteidigungstechnische Wirksysteme mbH Penetrationsgeschoss und Verfahren zur Erzeugung eines solchen Geschosses
DE102006061445B4 (de) 2006-12-23 2008-09-18 TDW Gesellschaft für verteidigungstechnische Wirksysteme mbH Penetrationsgeschoss
DE102020001785A1 (de) 2020-03-17 2021-09-23 Diehl Defence Gmbh & Co. Kg Gefechtskopf und Verfahren zur Bekämpfung eines Ziels mit dem Gefechtskopf
DE102020002460B3 (de) 2020-04-23 2021-09-23 TDW Gesellschaft für verteidigungstechnische Wirksysteme mit beschränkter Haftung Gefechtskopf mit mehrschichtiger Lagenfolge

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3224368A (en) * 1964-09-10 1965-12-21 Honeywell Inc Dual liner shaped charge
DE2336750A1 (de) * 1973-07-19 1975-04-10 Hans Walter Loeckmann Perforationsgeraet mit hohlladung
US4498367A (en) * 1982-09-30 1985-02-12 Southwest Energy Group, Ltd. Energy transfer through a multi-layer liner for shaped charges
DE2927555C1 (de) * 1979-07-07 1985-05-09 Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn Hohlladungsauskleidung und Verfahren zu deren Herstellung
US4747350A (en) * 1984-06-18 1988-05-31 Alexander Szecket Hollow charge
FR2632394A1 (fr) * 1986-07-24 1989-12-08 France Etat Armement Charge explosive generatrice de noyau

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3224368A (en) * 1964-09-10 1965-12-21 Honeywell Inc Dual liner shaped charge
DE2336750A1 (de) * 1973-07-19 1975-04-10 Hans Walter Loeckmann Perforationsgeraet mit hohlladung
DE2927555C1 (de) * 1979-07-07 1985-05-09 Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn Hohlladungsauskleidung und Verfahren zu deren Herstellung
US4498367A (en) * 1982-09-30 1985-02-12 Southwest Energy Group, Ltd. Energy transfer through a multi-layer liner for shaped charges
US4747350A (en) * 1984-06-18 1988-05-31 Alexander Szecket Hollow charge
FR2632394A1 (fr) * 1986-07-24 1989-12-08 France Etat Armement Charge explosive generatrice de noyau

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5279228A (en) * 1992-04-23 1994-01-18 Defense Technology International, Inc. Shaped charge perforator
GB2303687A (en) * 1995-07-27 1997-02-26 Western Atlas Int Inc Shaped charges
US5633475A (en) * 1996-03-08 1997-05-27 Western Atlas International, Inc. Circulation shaped charge
US6250229B1 (en) * 1996-04-02 2001-06-26 Giat Industries Performance explosive-formed projectile
US6035785A (en) * 1997-02-06 2000-03-14 Giat Industries Explosively-formed charge with attachment means between the liner and the casing
WO2006054081A1 (en) * 2004-11-16 2006-05-26 Qinetiq Limited Improvements in and relating to oil well perforators
US7987911B2 (en) 2004-11-16 2011-08-02 Qinetiq Limited Oil well perforators
US9371709B2 (en) 2010-04-09 2016-06-21 Hunting Titan, Inc. Downhole severing tool
US20130284441A1 (en) * 2011-06-08 2013-10-31 James E. Brooks Downhole severing tool
US9140088B2 (en) * 2011-06-08 2015-09-22 Hunting Titan, Inc. Downhole severing tool

Also Published As

Publication number Publication date
EP0437992B1 (de) 1993-09-15
DE69003374T2 (de) 1994-02-24
FR2655719B1 (fr) 1994-05-06
FR2655719A1 (fr) 1991-06-14
DE69003374D1 (de) 1993-10-21
ES2046746T3 (es) 1994-02-01

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