EP1878993A2 - Keramik- oder Metal-Plattenpanzer - Google Patents

Keramik- oder Metal-Plattenpanzer Download PDF

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Publication number
EP1878993A2
EP1878993A2 EP07252773A EP07252773A EP1878993A2 EP 1878993 A2 EP1878993 A2 EP 1878993A2 EP 07252773 A EP07252773 A EP 07252773A EP 07252773 A EP07252773 A EP 07252773A EP 1878993 A2 EP1878993 A2 EP 1878993A2
Authority
EP
European Patent Office
Prior art keywords
tile
armour
tiles
slots
slot
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.)
Withdrawn
Application number
EP07252773A
Other languages
English (en)
French (fr)
Other versions
EP1878993A3 (de
Inventor
Roger Terence Arthur Medwell
Stuart Richard Cowling
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.)
NP Aerospace Ltd
Original Assignee
NP Aerospace Ltd
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 NP Aerospace Ltd filed Critical NP Aerospace Ltd
Publication of EP1878993A2 publication Critical patent/EP1878993A2/de
Publication of EP1878993A3 publication Critical patent/EP1878993A3/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H5/00—Armour; Armour plates
    • F41H5/02—Plate construction
    • F41H5/04—Plate construction composed of more than one layer
    • F41H5/0414—Layered armour containing ceramic material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H5/00—Armour; Armour plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H5/00—Armour; Armour plates
    • F41H5/02—Plate construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H5/00—Armour; Armour plates
    • F41H5/02—Plate construction
    • F41H5/023—Armour plate, or auxiliary armour plate mounted at a distance of the main armour plate, having cavities at its outer impact surface, or holes, for deflecting the projectile
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H5/00—Armour; Armour plates
    • F41H5/02—Plate construction
    • F41H5/04—Plate construction composed of more than one layer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H5/00—Armour; Armour plates
    • F41H5/02—Plate construction
    • F41H5/04—Plate construction composed of more than one layer
    • F41H5/0442—Layered armour containing metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H5/00—Armour; Armour plates
    • F41H5/02—Plate construction
    • F41H5/04—Plate construction composed of more than one layer
    • F41H5/0492—Layered armour containing hard elements, e.g. plates, spheres, rods, separated from each other, the elements being connected to a further flexible layer or being embedded in a plastics or an elastomer matrix

Definitions

  • This invention relates to armour, for example ceramic armour formed from a plurality of tiles.
  • Armour-piercing bullets normally consist of a very hard penetrating core covered in a softer jacket that engages with the rifling of the gun during firing and provides an aerodynamic outer shape for low drag and high accuracy.
  • the penetrating core sometimes simply referred to as the penetrator or the core, is normally designed with a sharp point so as to focus the kinetic energy of the projectile on a very small area of the front face of the armour during impact.
  • Known armour seeks to dissipate this kinetic energy with minimum armour damage and without allowing penetration of the threat projectile or dislodged armour fragments through the armour system into a protected region.
  • Ceramic armour is often used in view of its reduced weight as compared to metallic armour.
  • Figure 1 shows known ceramic armour constructed in two layers in accordance with the "disturber-absorber" principle, whereby a hard front face 11 is used to “disturb” the normal operation of an armour-piercing bullet 12 and a backing layer 13 of composite materials and/or air gaps and/or metallic materials is used to "absorb" the residual effects of the disturbed core and any fragments dislodged from the disturber layer.
  • the ceramic disturber layer 11 is selected to have high hardness when compared to that of an armour-piercing core. This enables it to blunt and/or fracture the core during impact, significantly reducing its penetrating ability.
  • a conoid 14 of fractured ceramic sometimes termed a "conoid of rubble", also forms in the ceramic layer 1 with the point of impact at its apex. The formation of this conoid absorbs kinetic energy from the core, following which the conoid 14 itself tends to dissipate the core's remaining kinetic energy over a larger area as it tries to continue forward, decelerating as it works its way through the "rubble".
  • Ceramic armour such as that shown in Figure 1 is normally in the form of an array of close-fitting tiles which are polygonal, e.g. square or hexagonal.
  • An impact on a tile will cause local damage around the impact point as well as initiating cracks which can propagate over long distances as far as the edge of the tile, but not into adjacent tiles. These cracks may result in sections of the ceramic layer becoming loose and falling away, or reduce the tile's ability to withstand further bullet strikes due to pre-existing damage. Therefore, for multi-hit capability the surface area of any one tile should be small to limit the extent of surface damage caused by the impact of a single projectile.
  • minimum tile size is normally governed by the need to spread the kinetic energy of the bullet over a large area of the absorber layer.
  • large arrays of small tiles can be very expensive in terms of the time taken to lay out and properly align the tile array, when compared to the application of small numbers of large tiles.
  • the invention provides a hard faced armour tile comprising an array of sub-tiles formed by narrow slots.
  • the slots tend to be in the path of and terminate any cracks propagating from an impact point and thus increase the multi-hit performance compared to traditional large ceramic tiles.
  • the sub-tiles may be square or hexagonal or of more than one shape.
  • the slots can be straight and elongate, L-shaped or cross-shaped.
  • the tile can be curved in order to protect a region or object of a given shape.
  • a chamfer or curved transition zone can be formed between an internal surface of each slot and the front surface of the tile.
  • the slot may be asymmetric with the chamfer on one side of the slot at a different angle to the other side.
  • Such chamfers or zones can form a groove around each slot, and in an embodiment of the invention the grooves intersect with each other.
  • slots and or/grooves can be formed on a rear surface as well as a front surface of the hard layer.
  • the tile may be of ceramic material or another hard material such as a metal matrix composite material.
  • the invention also provides armour comprising a plurality of tiles as defined above in layers and a moulding material holding the tiles together.
  • the moulding material flows through the slots and, where the grooves are provided, along the grooves from one slot to another.
  • the moulding material may be metallic or comprise a polymeric resin.
  • the tiles are stitched together using fibrous material passing through the slots.
  • An absorber layer may be provided or where the thickness of the moulding is sufficient the armour may function as a disturber-absorber system by itself.
  • FIG 1 shows the known armour already discussed
  • Figures 2a and 2b are a front view and a cut-away view respectively of a tile according to the invention.
  • Figures 3a and 3b are a front view and a cut-away view respectively of an alternative tile according to the invention.
  • Figures 4a and 4b are a front view and a perspective view respectively of another alternative tile
  • Figures 5a and 5b are a front view and a cut-away view respectively of yet another alternative tile
  • Figures 6a and 6b are a perspective view and a sectional view respectively of a curved tile according to the invention.
  • Figure 7 shows a tile with a chamfered slot
  • Figure 8 shows a tile with a curved-edge slot
  • Figures 9a and 9b are a front view and a perspective view respectively of another alternative tile according to the invention.
  • Figures 10a to 10c show symmetrical and asymmetrical broken edge slot geometries
  • Figures 11a to 11c are a front view and two perspective views respectively of a tile according to the invention.
  • Figures 12a to 12c are a front view and two perspective views respectively of another tile according to the invention.
  • Figure 13 shows two tiles, each according to Figures 12a to 12c, with an added reinforcement.
  • Figure 2a shows a ceramic tile having a plurality of through slots 1 arranged so as to divide the tile into square sub-tiles 2 with half the slots horizontal and half vertical.
  • Figure 2b is a view of the tile cut-away along line A-A.
  • Figure 3a shows an alternative tile in which the majority of the slots 3 are L-shaped, slots 1 ' at the edge of the array being straight.
  • Figure 3b is a view of the tile cut-away along line B-B.
  • Figures 4a and 4b show a tile formed from hexagonal sub-tiles 4, defined by straight slots 5. A plurality of such tiles will tessellate when fitted together.
  • Figure 5a shows an embodiment of tile comprising an array of cross-shaped slots 6.
  • Figure 5b is a view of the tile cut-away along line C-C.
  • the tile design may need to adapt in terms of edge profile or surface curvature to match the geometry of the three-dimensional region it is intended to protect and the approach direction of the threat bullets.
  • Figures 6a and 6b show a curved tile.
  • Figure 7 shows an embodiment of slot which is designed to reduce the potential weakness caused by the truncation of the conoid of rubble and to destabilise or tilt the bullet core.
  • the edge of the slot is chamfered at 7.
  • the projectile 8 impacts a surface at an angle less than 90° to the projectile axis. This causes a partial ricochet or tilting due to the off-axis impact force on the nose of the projectile.
  • Figure 8 shows a curved-edge slot which achieves the same effect.
  • Figures 9a and 9b show a tile having the slots of Figure 7.
  • the chamfers 7 form grooves surrounding the slots 5'.
  • Figure 10a shows that when the axis of the bullet 8 precisely aligns with the axis of the slot 5', the bullet 8 is equally supported whilst aiming directly at the ceramic-free weak spot between the sub-tiles.
  • the chamfer 7' can be made asymmetric as shown in Figures 10b and 10c.
  • Figures 11a to 11c show a tile in which grooves 7' around the slot intersect above the fused regions between the sub-tiles. This controls the location of fractures caused by bending moments induced across the tile. To fully control the location of any bending-moment-induced-fractures, the intersecting grooves 7' are also formed below the slots. Any bending-moment-induced-through-thickness fractures will then tend to occur in the fused regions between sub-tiles. In addition, cracks tending to propagate from an impacted sub-tile directly through a fused region into an adjacent sub-tile will be diverted. On meeting a groove the crack will tend to grow along the line of the groove until it meets with the end of a slot.
  • the grooves 7, 7' enable the moulding material to flow easily between the slots, thereby increasing the integrity of the moulded wrapping, even with a thin or partial moulded covering at front and rear. Producing such a package in a moulding with a substantial layer of resin and/ or reinforcement on the front and rear can further enhance the integrity of the overall package.
  • the moulding can be produced using any feasible moulding technique with a metallic or polymeric resin system, with either continuous, particulate or chopped fibre reinforcement of a variety of types.
  • the tiles are stitched through the slots to ensure a continuous fibre reinforcement extends through the thickness of the armour package rather than being present only on its surface.
  • Such a continuous fibre reinforcement can also pass through the grooves of the inventive tile.
  • Figures 12a to 12c show a tile suitable for use in this embodiment of the invention.
  • Figure 13 shows two such tiles and fibre reinforcements 9 extending along the grooves 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Finishing Walls (AREA)
EP07252773A 2006-07-11 2007-07-11 Keramik- oder Metal-Plattenpanzer Withdrawn EP1878993A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0613764A GB2439958A (en) 2006-07-11 2006-07-11 Armour tile arrangement

Publications (2)

Publication Number Publication Date
EP1878993A2 true EP1878993A2 (de) 2008-01-16
EP1878993A3 EP1878993A3 (de) 2008-05-21

Family

ID=36955448

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07252773A Withdrawn EP1878993A3 (de) 2006-07-11 2007-07-11 Keramik- oder Metal-Plattenpanzer

Country Status (2)

Country Link
EP (1) EP1878993A3 (de)
GB (1) GB2439958A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITFI20090130A1 (it) * 2009-06-17 2010-12-18 Ind Bitossi Spa Componenti per corazze ceramiche.
US8375841B2 (en) 2009-06-17 2013-02-19 Industrie Bitossi, S.p.A. Armor tile
WO2014016573A1 (en) * 2012-07-27 2014-01-30 Np Aerospace Limited Armour

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2459174C1 (ru) * 2011-03-09 2012-08-20 Закрытое акционерное общество "Кираса" Керамический бронеэлемент и композитная броня на его основе
RU2472099C1 (ru) * 2011-06-08 2013-01-10 Холдинговая компания "Новосибирский Электровакуумный Завод - Союз" в форме открытого акционерного общества Керамический бронеэлемент и способ его изготовления

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1151441A (en) * 1966-03-31 1969-05-07 Aerojet General Co Lightweight Armour Material
DE3940623A1 (de) * 1989-12-08 1991-06-13 Sst Sicherheits Und Systemtech Panzerungselement fuer eine ballistische panzerplattenanordnung
GB2377006A (en) * 2001-06-30 2002-12-31 David Adie Ballistic protection shield
WO2003057462A1 (en) * 2001-12-31 2003-07-17 Higher Dimension Medical, Inc. Penetration resistant fabric with multiple layer guard plate assemblies and method of making the same
WO2005114089A1 (de) * 2004-05-19 2005-12-01 Deutsches Zentrum für Luft- und Raumfahrt e.V. Keramische panzerplatte, panzerungssystem und verfahren zur herstellung einer keramischen panzerplatte

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4030427A (en) * 1974-10-30 1977-06-21 The United States Of America As Represented By The Secretary Of The Navy Armor plate
GB2336807A (en) * 1998-04-27 1999-11-03 David Adie Ceramic sandwich material for ballistic protection
DE50306975D1 (de) * 2003-11-25 2007-05-16 Sgl Carbon Ag Keramische ballistische Schutzschicht

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1151441A (en) * 1966-03-31 1969-05-07 Aerojet General Co Lightweight Armour Material
DE3940623A1 (de) * 1989-12-08 1991-06-13 Sst Sicherheits Und Systemtech Panzerungselement fuer eine ballistische panzerplattenanordnung
GB2377006A (en) * 2001-06-30 2002-12-31 David Adie Ballistic protection shield
WO2003057462A1 (en) * 2001-12-31 2003-07-17 Higher Dimension Medical, Inc. Penetration resistant fabric with multiple layer guard plate assemblies and method of making the same
WO2005114089A1 (de) * 2004-05-19 2005-12-01 Deutsches Zentrum für Luft- und Raumfahrt e.V. Keramische panzerplatte, panzerungssystem und verfahren zur herstellung einer keramischen panzerplatte

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITFI20090130A1 (it) * 2009-06-17 2010-12-18 Ind Bitossi Spa Componenti per corazze ceramiche.
WO2010146106A1 (en) * 2009-06-17 2010-12-23 Industrie Bitossi S.P.A. Ceramic armor component
US8375841B2 (en) 2009-06-17 2013-02-19 Industrie Bitossi, S.p.A. Armor tile
WO2014016573A1 (en) * 2012-07-27 2014-01-30 Np Aerospace Limited Armour
US10012478B2 (en) 2012-07-27 2018-07-03 Np Aerospace Limited Armour

Also Published As

Publication number Publication date
EP1878993A3 (de) 2008-05-21
GB0613764D0 (en) 2006-08-23
GB2439958A (en) 2008-01-16

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