EP1429105A1 - Multi layer armour - Google Patents

Abstract

Device used for armor-plating comprises at least two layers of different materials of which at least one layer (1, 2) is made of steel. An intermediate layer (3) of wood is arranged between two layers of steel. Preferred Features: The intermediate layer is made of at least one hard wood, preferably at least partly of beech wood. The intermediate layer is made at least partly of glued wood or compacted wood. The plate layers have a thickness of about 5 mm. The intermediate layer has a thickness of about 20-30 mm.

Description

The invention relates to a device for armor, the from at least two layers of different materials is formed and at least one of the layers Steel.

Such armor devices are used for Numerous civil and military applications used. For example, embodiments are known which are made entirely of steel and thereby one high resilience, but also one have high weight. It is also known Devices for armoring from material combinations of Manufacture plastics with ceramics and aramid fibers.

The known devices thus either relatively heavy on what a use in the marine or Land vehicle construction difficult, or can the required Ensure properties only under certain circumstances.

The object of the present invention is therefore a Device of the type mentioned in the introduction construct that these are both lightweight and also has high bullet resistance.

This object is achieved in that an intermediate layer is made of wood and that the Intermediate layer between two steel plate layers is arranged.

By using two steel plate layers, between which a layer of wood is arranged, depending Unit of weight a significant increase in ballistic Efficiency achieved. An impacting projectile undergoes deformation in the first layer of steel as well a change in his trajectory. Within the There is another change in the wood layer Trajectory of the projectile, a fanning out of through made contact with the first layer of steel Projectile fragments and, if necessary, a rotary movement the projectile particle with superimposed wobble movements. in the The area of the second layer of steel becomes a large-scale conversion of the kinetic energy of the Bullet caused in mechanical deformation energy. Experiments carried out have shown that a Device according to the invention with the same armor effect compared to a comparable embodiment Made entirely of steel, reduced by around 30% Has weight. A given armor effect can hereby realized with a significantly reduced construction weight become.

This can result in increased ballistic effectiveness that the liner is made of at least one hardwood is trained.

In particular, it is thought that the liner is made of beech wood at least in some areas.

The generation of wobble of the penetrating Projectile can be supported by using wood fibers the liner at least in some areas with a Alignment component parallel to the plate layers run.

A defined positioning of the plates relative to each other is supported by the fact that the plate layers and the intermediate layer are glued together.

An advantageous choice of materials is that at least one of the plate layers from a thinly rolled Armored steel is formed.

Uniform armor effect throughout Armor area is supported by the fact that the Plate layers arranged essentially parallel to each other are.

An optimal relationship between armor effect and used weight can be achieved that the Plate layers relative to each other a distance in the area have from 20 to 30 mm.

A further increase in effectiveness is achieved that the liner is made up at least in some areas glued wood is formed.

A transverse deflection of projectile parts as well as one increased internal effective area of the armor achieved by a plurality of wooden parts are glued together.

The liner's own ballistic effectiveness can be increased by making the liner out pressed wood is formed.

A typical dimensioning is such that the Board layers each have a thickness of approximately 5 mm. This depends on the required ballistic Level of protection.

It is also in terms of sizing remember that the liner has a thickness of about 20 up to 30 mm.

When using special, so-called "armored wood" can also be used in addition to ballistic protection high airborne sound insulation, high Fire resistance duration and better radiation protection to reach.

Fig. 1

eine perspektivische Darstellung der einzelnen Platten vor einem Zusammenfügen und

Fig. 2

einen Querschnitt durch eine dreilagige Vorrichtung.

Exemplary embodiments of the invention are shown schematically in the drawings. Show it:

Fig. 1

a perspective view of the individual plates before assembly and

Fig. 2

a cross section through a three-layer device.

Figure 1 shows a perspective view of the individual components of the armor device. A outer plate layer (1) is made of steel and with a distance and substantially parallel to an inner one Board layer (2) arranged, also made of steel is trained. There is one between the plate layers (1, 2) Intermediate layer (3) made of wood. In particular is on thought of using hardwood. Has proven itself especially the use of beech wood. An increase in Ballistic effectiveness of the liner can be demonstrated by a Pressing the wood can be achieved. Particularly advantageous turns out to be the use of pressed and glued Wood.

To ensure a reliable connection of the Board layers (1, 2) with the intermediate layer (3) takes place Bonding. The implementation is particularly advantageous of flat bonds.

Figure 2 illustrates the plate-like structure of the Device and in particular the direct contact of the Board layers (1, 2) with the intermediate layer (3). The direct contact ensures that even with a Impact of a projectile the basic geometric structure essentially remains.

Claims (13)

Armor device, which is formed from at least two layers of different materials and in which at least one of the layers consists of steel, characterized in that an intermediate layer (3) is made of wood and that the intermediate layer (3) between two plate layers (1, 2) is made of steel. Device according to claim 1, characterized in that the intermediate layer (3) is formed from at least one hardwood. Apparatus according to claim 1 or 2, characterized in that the intermediate layer (3) is made of beech wood at least in some areas. Device according to one of claims 1 to 3, characterized in that wood fibers of the intermediate layer (3) run at least in regions with an alignment component parallel to the plate layers (1, 2). Device according to one of claims 1 to 4, characterized in that the plate layers (1, 2) and the intermediate layer (3) are glued together. Device according to one of claims 1 to 5, characterized in that at least one of the plate layers (1, 2) is formed from a thinly rolled armored steel. Device according to one of claims 1 to 6, characterized in that the plate layers (1, 2) are arranged substantially parallel to one another. Device according to one of Claims 1 to 7, characterized in that the plate layers (1, 2) are at a distance from one another in the range from 20 to 30 mm. Device according to one of claims 1 to 8, characterized in that the intermediate layer (3) is formed at least in regions from glued wood. Device according to one of claims 1 to 9, characterized in that a plurality of wooden parts are glued together. Device according to one of claims 1 to 10, characterized in that the intermediate layer (3) is made of pressed wood. Device according to one of claims 1 to 11, characterized in that the plate layers (1, 2) each have a thickness of about 5 mm. Device according to one of claims 1 to 12, characterized in that the intermediate layer (3) has a thickness of about 20 to 30 mm.

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