UA141921U - CERAMIC ARMOR ELEMENT DESIGNED FOR DISCRETE CERAMIC-POLYMER COMPOSITE ARMOR - Google Patents

Abstract

Ceramic armor element is designed for discrete ceramic-polymer composite armor, made of hexagonal shape. Made as a hexagonal prism with flat, convex and / or concave ends, where each side face of the element contains a trapezoidal protrusion that is integral with the armor element, while the trapezoidal protrusion is located on the edge of the side face in the triple joint of three ceramic armor elements.

Description

The useful model belongs to the means of protection of lightly armored ground and aviation equipment from armor-piercing bullets and projectile fragments, in particular, to the ceramic armor elements used for this purpose.

The most effective armor structures capable of providing protection against large-caliber armor-piercing rounds are macro-layered composite structures containing layers made of materials of different chemical nature. Such armored structures have a crushing-deflecting layer consisting of separate (discrete) ceramic elements connected to each other by high-strength polymer material, and an energy-absorbing substrate made of metal or textile-polymer materials. In the case of using such armor for the protection of ground military equipment, the substrate is the side of the armored combat vehicle (ABV).

The use of discrete ceramic armor elements instead of a solid ceramic plate makes it possible to significantly increase the survivability of the armor. In an ideal case, when a striking element (bullet, fragment) is hit in the armor panel, only one ceramic armor element should be destroyed, and all other armor elements should remain intact. To achieve this goal, armor elements are made in the form of a cylinder or a hexagonal or tetrahedral prism with flat, convex or concave ends and are placed in an armor panel with clearly fixed gaps filled with polymer binding material. At the same time, the size of the gap between the armor elements is very important. So, when the armor elements are too far apart, there is a high probability that the striking element will not be stopped when hitting it in the gap between the armor elements. On the other hand, if individual ceramic elements are directly adjacent to each other, when an impacting element hits the ceramic element, the shock wave can be transmitted to neighboring elements. When the armor elements touch each other, the energy from the impact spreads through the armor panel as if it were a solid ceramic plate, destroying a large number of the armor elements, resulting in a decrease in the survivability of the armor.

Therefore, the gap between the armor elements must have a clearly fixed size, which depends on the size of the striking element, and be uniform over the entire plane of the armor panel, which is provided at the stage of assembly of the protective structure.

To ensure the specified requirements, special devices are used, as in patent VO Mo 2119635, Б41Н1/02, Е41Н5/04, publ. 09/27/1998, or intermediate elements in the form of guide nets, as in patent OA Mo 128670, IPC E41N 1/02, publ. 09/25/2018

Also, the task can be solved by creating ceramic armor elements of a special shape. So, in patent VO Mo 2378601, E41Н5/04, publ. 01/10/2010, a hexagonal shaped ceramic armor element is proposed, which includes a tooth on each side of the hexagonal element. When the ceramic armor element is rotated 60" along the axis of symmetry of the ceramic element's hexagonal cross-section, the position of the teeth on the ceramic armor element remains essentially the same. The teeth can be integral to the element, cast as part of the element. This element shape has the advantage of being simplified the process of assembling the ceramic elements into an armor panel. The hexagonal symmetry of the elements means that the orientation of the elements in the matrix can be achieved with minimal effort. The cast teeth on the sides of the elements provide space for a controlled uniform bonding layer between the elements, equivalent to the width of the tooth. Uniform bonding layer between elements limits the transfer of energy to adjacent elements. In the present invention, due to the reduction of energy transfer between elements, there is a high probability that the ceramic armor elements in the panel will remain intact. The invention has the additional advantage that the teeth evenly space adjacent elements , so you can do without additional devices to ensure a fixed gap between the armor elements. The main disadvantage of the described armor element is the presence of a weakened zone at the junction of any three adjacent elements (weakened triple junction).

The task of this useful model is to create a new ceramic armor element that preserves the positive qualities of the closest analogues and is devoid of the above-mentioned shortcomings in order to increase the armor resistance and reliability of ceramic-polymer armor panels made using the developed armor elements.

The task is solved by the proposed new ceramic armor element, intended for discrete ceramic-polymer composite armor, which has the shape of a hexagonal prism with flat, convex or concave ends, and which is distinguished by the fact that each side face of the element contains a trapezoidal protrusion that is integral with the armor element , while the trapezoidal protrusion is located from the edge of the side face in the zone of the triple junction of three ceramic armor elements, while the height of the trapezoidal protrusion

She: 1

И-5БВ- и 0, the length of the trapezoidal projection /: 1,-- -5ю»х

B 2, and p is the size of the striking element - the caliber of the bullet.

The dimensions of the protrusion on the armor element depend on the size of the striking element (bullet caliber

OB), protection against which is provided by an armored panel made using these armor elements. Yes, the height of its trapezoidal protrusion has a size of 10 and a length

I, - 1r protrusion I has a size equal to approximately 2 (See Fig. 3, Fig. 4).

Next, a detailed description of the technical solution will be given. This description is not restrictive, that is, possible further improvements should be clear to the specialist, without going beyond the essence disclosed in the formula.

A useful model is explained with the help of the attached drawings.

The drawings show:

Fig. 1 - a ceramic armor element that has the shape of a hexagonal prism with flat ends,

Fig. 2 - a ceramic armor element that has the shape of a hexagonal prism with convex or concave ends

Fig. C is a trapezoidal projection

Fig. 4 - triple junction zone

The following designations are used on the drawings: p - the caliber of the impressive element;

Y - the length of the trapezoidal projection;

T is the height of the trapezoidal projection.

With the dimensions of the protrusion proposed by this technical solution, when assembling the armor elements into the armor panel, a uniform gap is formed between the elements, the width of which is equal to the height of the protrusion, and in the zone of the triple junction of the elements due to the protrusions, a reinforced area is formed, the diameter of which is commensurate with the caliber of the striking element 0.

The ceramic material from which the armor element is made is either aluminum oxide or

From silicon carbide, or boron carbide, or composites based on them.

Example 1. For the manufacture of ceramic-polymer composite armor for protection against armor-piercing bullets of caliber Yu-7.62 tt, hexagonal ceramic and armor elements are used

IB-15908 with trapezoidal protrusions on the side faces, which have a height of 10 mm and

And, - 1 RA length of 2 MM.

The proposed technical solution works as follows. The ceramic armor element is intended for use in discrete ceramic-polymer composite armor. Armor panels are made using such armor elements and installed on board BBM. The mechanism of the protective effect of the armor is as follows: when the bullet meets a ceramic element, it begins to destroy and deviates from the initial trajectory of movement, while a significant part of the kinetic energy of the bullet is spent directly on the destruction of the bullet and the armor element, as well as on bringing the neighboring ceramic elements into oscillating motion (the so-called "billiards effect").

Fragments of destroyed bullets and armor elements are retained on the substrate. The proposed shape of the armored element provides it with maximum shock resistance due to the uniform distribution of stresses in the body of the armored element. When a bullet contacts an armor element, the bullet ricochets regardless of the point and angle of its contact with the spherical part of the armor element.

The proposed armor element increases the stability of the armor and does not impose strict restrictions on the angle of inclination of the panel, made using such armor elements, when it is installed on board the BBM.

It should be understood that the examples and embodiments described above are illustrative only and various modifications and changes are suggested to those skilled in the art that are within the scope of this application and the scope of the utility model formulation.

It should be understood that the above information in no way limits the scope of the rights under the application.

Claims (1)

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