CN113883964B - Scale composite armor body - Google Patents
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- CN113883964B CN113883964B CN202111130141.1A CN202111130141A CN113883964B CN 113883964 B CN113883964 B CN 113883964B CN 202111130141 A CN202111130141 A CN 202111130141A CN 113883964 B CN113883964 B CN 113883964B
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- 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
- F41H5/007—Reactive armour; Dynamic armour
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Abstract
The invention relates to the field of individual protective equipment, in particular to a scale composite armor body. The scale composite armor body comprises a substrate bulletproof layer, an elastic layer and a plurality of hard armor plates; the elastic layer is arranged on the substrate bulletproof layer; a plurality of jacks are arranged in the elastic layer and used for fixedly mounting a plurality of hard nail plates; the plurality of hard armor plates are sheets with the same or different shapes, and are obliquely inserted and fixed in the plurality of inserting holes in a bonding manner; the included angle between the jacks and the base bulletproof layer is 5-15 degrees; the upper parts of the nail pieces of the plurality of hard nail pieces are overlapped and arranged along the surface of the scale composite nail body. The scale composite armor has good bulletproof performance and flexibility, and can effectively reduce the after effect damage.
Description
Technical Field
The invention relates to the field of individual protective equipment, in particular to a scale composite armor body.
Background
The existing individual protection equipment can resist the attack of gunshot and sharp object puncture, but the non-penetrating impact injury to the human body cannot be avoided, and the injury is always fatal. For example, when a bulletproof helmet is made of fiber-reinforced composite materials such as para-aramid and ultra-high molecular weight polyethylene, the deformation of the recess is often difficult to control within the safe range that the head can bear during impact. The soft bulletproof clothes and stab-resistant clothes made of the high-strength fiber cloth have certain flexibility, and are also insufficient in the aspects of dent resistance, non-penetrating damage avoidance and the like. The bulletproof flashboard formed by compounding the ceramic and the fiber reinforced composite material is thick and hard, and influences the mobility of personnel to a certain extent. Meanwhile, although the hard armor can prevent bullets from penetrating, the impact energy cannot be dissipated quickly, and the human tissues on the back of the armor are shot to generate large-area bruise, so that internal organs of a human body can be damaged in serious cases. Body armor of the "longsquama" type, which comprises hard armor plates, soft fiber layers and adhesives, has a certain flexibility, but also cannot avoid the damage after impact. The aftereffect damage is usually measured by the transient pressure on the back of the bullet, and the pressure value can be measured by placing a pressure sensor on the back of the armor. In view of this, the invention is particularly proposed.
Disclosure of Invention
The invention aims to provide a scale composite armor.
In order to achieve the purpose of the invention, the technical scheme is as follows:
the invention provides a scale composite armor body which comprises a substrate bulletproof layer, an elastic layer and a plurality of hard armor pieces;
the elastic layer is arranged on the base bulletproof layer;
a plurality of jacks are arranged in the elastic layer and used for fixedly mounting the plurality of hard armor plates;
the hard nail plates are thin plates with the same or different shapes, the hard nail plates are obliquely inserted and fixedly bonded in the jack holes, the part of the hard nail plates embedded in the elastic layer is the bottom of the nail plate, and the part of the hard nail plates on the elastic layer is the upper part of the nail plate;
the included angle between the jacks and the base bulletproof layer is 5-15 degrees;
the upper parts of the nail pieces of the plurality of hard nail pieces are overlapped and arranged along the surface of the scale composite nail body.
Optionally, a coating layer is further arranged on the surface of the scale composite armor body; preferably, the coating layer is made of para-aramid fibers with the strength of more than 3.5GPa and the elongation of more than 3.3%; more preferably, the surface density of the coating layer is 350-450 g/m2。
Optionally, the base bulletproof layer comprises a plurality of layers of soft bulletproof materials, and the soft bulletproof materials are selected from ultra-high molecular weight polyethylene non-woven cloth and/or aramid non-woven cloth;
preferably, the number of the plurality of layers of soft bulletproof materials in the base bulletproof layer is 10-24, and more preferably 14-20.
Optionally, the thickness of the elastic layer is 10 mm-20 mm;
preferably, the elastic layer is made of a material selected from materials with a strain rate response range of 1-10000 s-1More preferably a foamed material containing a polyborosiloxane and a polyurethane.
Optionally, the thickness of the hard nail plate is 3-5 mm;
preferably, the material of the hard armor plate is selected from at least one of ceramics, metals and composite fiber materials, and is preferably carbon fiber composite material;
more preferably, the tensile strength of the carbon fiber composite material is not less than 5GPa, and the tensile modulus is not less than 350 GPa.
Optionally, the hard nail plate is disc-shaped, the diameter of the hard nail plate is l, and the thickness of the hard nail plate is h1(ii) a Preferably, l: h is1The ratio of (A) to (B) is 15: 1-5: 1.
optionally, the hard nail plate is arc-shaped, the diameter of the hard nail plate is l, and the thickness of the hard nail plate is h1The hard nail plate has a circular arc-shaped section, and the distance between the highest point of the circular arc and the bottom edge of the circular arc is h2(ii) a Preferably, h2：h1The ratio of (A) to (B) is 1.1-1.8: 1;
preferably, l: h is1The ratio of (A) to (B) is 15: 1-5: 1.
optionally, the jack is a rectangular or arc-shaped channel matched with the bottom of the hard nail plate; the width of the cross section of the jack is 0.9-1 time of the thickness of the hard armor plate.
Optionally, a first direction and a second direction perpendicular to the first direction are arranged on the plane of the scale composite armor body; the jacks are sequentially arranged along the first direction and the second direction at fixed intervals; the included angle between each jack and the first direction is 25-30 degrees.
Optionally, along the first direction, the distance between two adjacent jacks is not greater than 0.75-0.85 times, preferably 0.8 times of the l; in the second direction, the distance between two adjacent jacks is not more than 0.65-0.75 times of l, preferably 0.7 times.
The invention has at least the following beneficial effects:
1. the hard armor plate is fixedly connected with the elastic layer, so that the armor has better flexibility, the wearing comfort of a human body is improved, and the armor can flexibly move.
2. The hard nail plate is inserted into the insertion hole of the elastic layer, the insertion hole and the hard nail plate form a matching relation, and the connection is firm and reliable when multiple times of striking are borne.
3. The elastic layer has an energy dissipation effect, and can effectively reduce non-penetrating impact damage under the same external gunshot and puncture conditions.
Drawings
FIG. 1 is a schematic structural diagram of a scale composite armor body according to an embodiment of the invention;
FIG. 2 is a cross-sectional view of a scale composite armor body according to an embodiment of the present invention;
FIG. 3 is a schematic view of a disc-shaped hard nail plate;
FIG. 4 is a schematic view of an arcuate sheeted hard nail;
FIG. 5 is a schematic representation of the resilient layer in a squashed composite armor body according to an embodiment of the present invention;
wherein:
1: a coating layer;
2: an elastic layer;
2-1: a jack;
3: hard nail pieces;
3-1: the bottom of the shell;
3-2: the upper part of the nail;
4: an adhesive portion;
5: a base ballistic layer.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms also include the plural forms unless the context clearly dictates otherwise, and further, it is understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of the stated features, steps, operations, devices, components, and/or combinations thereof.
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a scale composite armor body which simulates the growth of hard armor plates in a biological structure in a soft tissue, creatively introduces a polymer elastomer material with shear thickening mechanism and strain rate sensitivity into the composite armor, solves the problems of reasonable connection and energy dissipation of the hard armor plates and the soft material, effectively absorbs impact energy and reduces the harm to human bodies on the back of the armor. The structure of the device is schematically shown in fig. 1, the cross-sectional view is shown in fig. 2, wherein fig. 2 is a cross-sectional view along a-a in fig. 1.
As can be seen from fig. 1 and 2, the scale composite armor body of the embodiment of the present invention comprises a base bulletproof layer 5, an elastic layer 2 and a plurality of hard armor pieces 3; the elastic layer 2 is arranged on the substrate bulletproof layer 5; a plurality of jacks are arranged in the elastic layer 2 and used for fixedly mounting a plurality of hard nail pieces 3; the plurality of hard nail plates 3 are thin plates with the same or different shapes, the plurality of hard nail plates 3 are obliquely inserted and fixedly bonded in the plurality of inserting holes, the part embedded in the elastic layer is a nail plate bottom part 3-1 (not marked in figures 1 and 2), and the part positioned on the elastic layer is a nail plate upper part 3-2 (not marked in figures 1 and 2); the included angle theta between the jacks and the base bulletproof layer 5 is 5-15 degrees.
When the included angle theta between the jacks and the base bulletproof layer is higher than the range, the overlapping part proportion of the armor plates is increased, so the weight of the armor is increased, and the overall bulletproof effect is relatively not obviously increased. Through the design, the hard armor pieces are firmly arranged in the elastic layer, so that the scale composite armor body has the advantages of flexibility and low after-effect damage on the basis of meeting the penetration resistance and impact resistance.
As shown in figure 1, the upper parts of the nail plates of a plurality of hard nail plates 3 are arranged in an overlapping way along the surface of the scale composite nail body. The overlapping arrangement means that the hard nail plates are sequentially arranged along two mutually perpendicular directions, namely a first direction and a second direction perpendicular to the first direction; in each row of hard nails along the first direction, the first hard nail overlaps with part of the second hard nail, and in the hard nails along the second direction, each row of hard nails overlaps with part of the second row of hard nails. Through the design, the nail pieces are mutually overlapped along two directions, so that effective protection is formed.
As shown in fig. 2, the surface of the scale composite armor body of the embodiment of the invention is also provided with a coating layer 1; the coating layer 1 is adhered to the surface of the composite armor body, so that the hard armor plate is prevented from falling off in impact. Specifically, the coating layer can be made of para-aramid fibers with the strength of more than 3.5GPa and the elongation of more than 3.3 percent; the surface density of the coating layer is 350-450 g/m2Preferably 400g/m2。
As shown in fig. 2, the bottom of the scale composite armor body of the embodiment of the present invention is a base bulletproof layer 5, and the base bulletproof layer 5 is used for loading the elastic layer 2 and has a plastic deformation mechanism to absorb impact energy. The bulletproof performance of the base bulletproof layer and the hard armor plate jointly play the functions of bulletproof and impact resistance. Specifically, the base bulletproof layer 5 comprises a plurality of layers of soft bulletproof materials, and the soft bulletproof materials are selected from at least one of ultra-high molecular weight polyethylene non-woven cloth and aramid non-woven cloth. The number of the layers of the multi-layer soft bulletproof material in the base bulletproof layer 5 is 12-22, and preferably 14-20. The surface density of the soft bulletproof material meets 200-240 g/m2. During parameter screening, it is found that when the number of layers is lower than the above range, the increase of the impact depression is significant, and when the number of layers is higher than the above range, the increase of the number of layers is continued without significant effect on the reduction of the depression.
In one embodiment, the material of the base bulletproof layer is selected from para-aramid fiber laid fabric, and the single-layer surface density is 220g/m2The number of layers is in the range of 14 to 20. After testing, canIs effective against a 7.62mm lead core pistol ammunition of 1951 launched by a light submachine gun of 1979.
The elastic layer of the scale composite armor body provided by the embodiment of the invention is made of a material with a strain rate response range of 1-10000 s-1The polymer elastomer has strain rate sensitive and shear thickening properties, and preferably comprises a foamed material of polyborosiloxane and polyurethane. The elastic layer is used for loading and fixing the hard armor plate, has an energy dissipation effect, and can effectively reduce non-penetrating impact damage under the same external gunshot and puncture conditions. Specifically, in order to meet the requirement of fixing the hard nail plate, the thickness of the elastic layer is 10 mm-20 mm. If the thickness is too thin, the length of the bottom of the nail plate embedded in the elastic layer is too short, so that the hard nail plate cannot be firmly fixed; if the thickness is too large, the length of the bottom of the armor plate embedded in the elastic layer is too long, and in order to enable the upper part of the armor plate to cover the surface of the elastic layer, the length of the hard armor plate along the insertion direction needs to be prolonged, so that the weight of the armor is increased, and the overall bulletproof effect is relatively not obviously increased.
In a specific embodiment, the material of the elastic layer is prepared from polyborosiloxane and polyurethane through a foam molding process, wherein the weight ratio of the polyborosiloxane to the polyurethane material is 5: 2 to 3. The foaming forming process can adopt a conventional process, the forming temperature ranges from 55 ℃ to 60 ℃, and the forming time is 5-10 minutes.
The hard armor plate of the scale composite armor body provided by the embodiment of the invention is made of hard materials selected from at least one of ceramics, metals and fiber composite materials, and preferably made of carbon fiber composite materials; the carbon fiber composite material has the technical advantages of high strength and light weight, the tensile strength is not lower than 5GPa, and the tensile modulus is not lower than 350 GPa. The hard armor plate of the scale composite armor body provided by the embodiment of the invention can be in any shape with smooth edge, is used for resisting penetration of bullets and sharp objects, and can also reduce the sunken deformation of the armor. In the scale composite armor body, the shape and size of the plurality of hard armor pieces may be the same or different. For ease of manufacture, it is preferred that the hard nail plates be designed to be uniform in shape and size. The hard nail plates can also be designed to be inconsistent in shape and size according to actual conditions.
As shown in figure 2, the bottom of the hard nail plate 3 is bonded with the bottom of the jack through a bonding part 4, so that the bonding firmness is improved.
When the hard armor plate is made of carbon fiber materials, the bonding material used in the bonding part is epoxy resin glue special for the carbon fiber materials, and the using method is curing at normal temperature for 10-14 hours.
In a specific embodiment, the hard nail plate can be in a shape of a circular plate, and is schematically shown in fig. 3, wherein the left drawing is a schematic drawing, and the right drawing is a sectional view along B-B in the left drawing. The diameter of the hard nail plate is l, and the thickness of the hard nail plate is h; the section of the hard nail plate is rectangular. Wherein 3-1 represents the bottom of the nail embedded in the elastic layer and 3-2 represents the upper part of the nail located on the elastic layer.
The thickness of the hard nail plate is h, and in order to meet the requirement of strength, the value range of h is 3-5 mm; if the value of h is too small, the strength is insufficient, and the requirements of bulletproof and impact resistance cannot be met. If the value of h is too large, the weight of the armor is increased, and the overall bulletproof effect is relatively not obviously increased.
Specifically, l: the ratio of h is 15: 1-5: 1, preferably 12: 1-8: 1, more preferably 10: 1. the advantage of this ratio is that flexibility and ballistic performance can be taken into account. Above this ratio, the hard armor plate is larger, resulting in lower flexibility of the armor; when the proportion is lower than the above range, the hard nail pieces are smaller and are easy to turn over, so that the bulletproof performance is reduced.
In a specific embodiment, the hard nail plate can be in the shape of an arc plate, the schematic view is shown in fig. 4, the left drawing is a schematic view, and the right drawing is a sectional view along B-B in the left drawing. The hard armor plate in the shape of an arc sheet is better in flexibility when bent and is not easy to turn over when being struck. The hard nail plate has a diameter of l and a thickness of h1The section of the hard nail plate is circular arc, and the distance between the highest point of the circular arc and the bottom edge of the circular arc is h2. Wherein 3-1 represents the bottom of the nail embedded in the elastic layer and 3-2 represents the upper part of the nail located on the elastic layer.
In particular, h1The value range of (A) is 3-5 mm.
Preferably, h2：h11.1-1.8: 1, preferably 1.3 to 1.7: 1, more preferably 1.4 to 1.6: 1, most preferably 1.5: 1. the arc-shaped sheet of the arc is most flexible. Above this ratio, the overall thickness of the armor would be too great; below this ratio, the effect of increasing flexibility is not significant enough.
Preferably, l: h is1Also 15: 1-5: 1, preferably 12: 1-8: 1, more preferably 10: 1. the advantage of this ratio is that flexibility and ballistic performance can be taken into account. Above this ratio, the hard armor plate is larger, resulting in lower flexibility of the armor; when the proportion is lower than the above range, the hard nail pieces are smaller and are easy to turn over, so that the bulletproof performance is reduced.
As shown in fig. 5, the elastic layer of the scale composite nail body of the embodiment of the invention is provided with a jack 2-1 for installing the hard nail plate 3, and the jack 2-1 is a rectangular or arc channel matched with the nail plate bottom 3-1 of the hard nail plate. As can be seen from fig. 5, the surface along the scale composite armor body has a first direction and a second direction perpendicular to the first direction; the jacks 2-1 are sequentially arranged along a first direction and a second direction at fixed intervals; the included angle gamma between each jack 2-1 and the first direction is 25-30 degrees. In parameter screening, it was found that when the included angle γ is lower than the above range, the bending ability of the armor is reduced and the wearing comfort is reduced, and when the included angle γ is higher than the above range, the bulletproof performance when the armor is bent is reduced.
The width w of the cross section of the jack is the thickness h (or h) of the hard nail plate1) 0.9-1 times, more preferably 0.9-0.95 times, and in the parameter screening, the hard nail plate and the elastic layer are tightly matched and firmly connected within the range. When the w width is larger than the above range, the connection is easily loosened, and when the w width is lower than the above range, it is inconvenient to install and insert the hard nail plate in the elastic layer.
In the first direction, the distance a between every two adjacent jacks is not more than 0.75-0.85 times of l, and preferably 0.8 times; in the second direction, the distance b between two adjacent insertion holes is not more than 0.65-0.75 times, preferably 0.7 times of l. When the spacing a and the spacing b are screened, the bulletproof capability of the overlapping area of the hard armor plates is weak and the armor is easy to penetrate when the spacing a and the spacing b exceed the multiple, and the overlapping area is enlarged when the spacing a and the spacing b are lower than the multiple, the weight of the armor is increased, and the overall bulletproof effect is relatively not obviously increased.
The scale composite armor body provided by the embodiment of the invention has good bulletproof performance, and meets the requirement that the hard armor piece does not fall off in a continuous six-time impact test.
The scale composite armor body provided by the embodiment of the invention has good flexibility, and can be bent towards the front side of the armor body by about 30 degrees and can be bent towards the back side of the armor body by about 50 degrees. Compared with hard armor, the wearing comfort is greatly improved.
The scale composite armor body of the embodiment of the invention can effectively reduce the aftereffect damage test: the pressure sensor is adopted to test the back pressure of the bullet impact of the bulletproof structure under the support of the clay identification target, and the peak value of the back pressure of the bullet impact is 1.5-2.2 MPa, and the average value is 1.85MPa under six times of strikes of a 7.62mm lead core pistol bullet launched by a light tommy gun in 1979 in 1951.
The embodiment of the invention also relates to a preparation method of the scale composite armor body, which comprises the steps of firstly designing a mould of the elastic layer, and forming the elastic layer with a plurality of insertion holes on the mould through a foam molding process. The laminated plate can be prepared through a hot pressing process, and the laminated plate is processed into a nail sheet with a specific shape through water cutting. And the elastic layer is bonded with the substrate bulletproof layer, the armor plate of the hard armor plate is fixedly connected in the jack through the bonding part, and the coating layer is bonded and fixed on the surface of the scale composite armor body.
Example 1
A scale composite armor body comprises a hard armor plate, an elastic layer, a base bulletproof layer, a bonding part and a coating layer. The hard armor plate is an arc-shaped flaky armor plate. The hard nail pieces are inserted into the insertion holes of the elastic layer and connected with the elastic layer through the bonding parts, and the adjacent nail pieces are in scale-shaped overlapping arrangement.
The hard nail plate has a diameter of 40mm and a thickness of h14mm, the cross section is circular arc, and the distance between the highest point of the circular arc and the bottom edge of the circular arc is h2；h2＝6mm。
Jack and base protectorThe included angle theta of the elastic layer is 15 degrees. A plurality of sheet holes are arranged on the elastic layer, and the width w of the opening is the thickness h of the nail10.95 times of. The scale composite armor body is provided with a first direction and a second direction perpendicular to the first direction; the jacks are sequentially arranged along a first direction and a second direction according to a fixed interval; each receptacle is angled at an angle y of 25 deg. to the first direction. The pitch a of adjacent jacks in the first direction (horizontal row) is 0.8 times of l, and the pitch b of adjacent jacks in the second direction (vertical row) is 0.7 times of l.
Selecting materials: the substrate bulletproof layer is made of flexible bulletproof fiber layer material, specifically para-aramid fiber non-woven cloth, and has a single layer surface density of 220g/m2The number of layers was 18. The coating layer is made of para-aramid fiber fabric with the surface density of 400g/m2. The hard armor plate is made of high-strength high-modulus carbon fibers, the tensile strength of the hard armor plate is not lower than 5GPa, and the tensile modulus of the hard armor plate is not lower than 350 GPa.
The preparation method comprises the following steps:
1. firstly, designing a mould of an elastic layer, and forming the elastic layer with a plurality of insertion holes on the mould through a foaming forming process;
2. the elastic layer is prepared from polyborosiloxane and polyurethane through a foaming molding process, wherein the weight ratio of the polyborosiloxane to the polyurethane is 5: 2, the forming temperature is 55-60 ℃, and the forming time is 9 minutes.
3. The laminated plate can be prepared by a hot pressing process and is processed into a round sheet A by water cutting.
4. And (3) bonding the elastic layer with the substrate bulletproof layer, connecting the hard armor plate with the elastic layer through a bonding part, and curing for 12 hours at normal temperature, wherein the bonding material is an epoxy resin adhesive special for carbon fiber composite materials.
5. The coating layer is bonded and fixed on the surface of the scale composite armor body.
And (3) performance testing:
the bulletproof performance is as follows: and the hard armor plate does not fall off when the test of six consecutive times of impact is carried out in a bending state, which shows that the connection is firm and reliable.
Flexibility: can be bent about 30 deg. towards its front side and about 50 deg. towards its back side. Compared with hard armor, the wearing comfort is greatly improved.
After-effect injury: the pressure sensor is adopted to test the impact back pressure of the bulletproof structure under the support of the clay identification target, and the surface density is 5.1kg/m under six times of impacts of a 7.62mm lead core pistol bullet launched by a light tommy gun in 1979 in 19512The peak value of the back face pressure of the ultra-high molecular weight polyethylene soft bulletproof garment is 2.5-3 MPa, and the average value is 2.75 MPa. The peak value of the impact back pressure of the scale composite armor body is 1.5-2.2 MPa, the average value is 1.85MPa, and the comparison result is reduced by about 33%, which shows that the flexible bionic scale composite armor can effectively reduce the after-effect damage.
Comparative example 1
A scale composite armor body comprises a hard armor plate, an elastic layer, a base bulletproof layer, a bonding part and a coating layer. The hard armor plate is arc-shaped. The hard nail pieces are inserted into the insertion holes of the elastic layer and connected with the elastic layer through the bonding parts, and the adjacent nail pieces are in scale-shaped overlapping arrangement.
The hard nail plate has a diameter of 20mm and a thickness of h12mm, the cross section is circular arc, and the distance between the highest point of the circular arc and the bottom edge of the circular arc is h2；h2＝6mm。
The angle theta between the jacks and the base bulletproof layer is 3 degrees. A plurality of sheet holes are arranged on the elastic layer, and the width w of the opening is the thickness h of the nail10.95 times of the total weight of the composition. The scale composite armor body is provided with a first direction and a second direction perpendicular to the first direction; the jacks are sequentially arranged along a first direction and a second direction according to a fixed interval; each receptacle is angled at an angle y of 25 deg. to the first direction. The pitch a of adjacent jacks in the first direction (horizontal rows) is 0.8 times of l, and the pitch b of adjacent jacks in the second direction (vertical rows) is 0.7 times of l.
The preparation method is the same as example 1.
And (3) performance testing:
the bulletproof performance is as follows: when six consecutive impact tests are carried out in a bending state, the hard nail plate does not fall off but has 3 times of breakdown. The comparison of the example results shows that breakdown is easy when the opening horizontal plane inclination angle θ is below a given range.
Flexibility: can be bent about 30 deg. towards its front side and about 50 deg. towards its back side. Compared with hard armor, the wearing comfort is greatly improved.
After-effect injury: the pressure sensor is adopted to test the back pressure of the bullet impact of the bulletproof structure under the support of the daub identification target, the peak value of the back pressure of the bullet impact of the scale composite armor body is 4-6 MPa, the average value is 5MPa under six times of impacts of a 7.62mm lead core pistol bullet launched by a 1971 type light submachine gun, and compared with the results of the embodiment, the back damage of the scale composite armor body is seriously increased when the inclination angle theta of an open pore horizontal plane is lower than a given range.
Comparative example 2
A scale composite armor body comprises a hard armor plate, an elastic layer, a base bulletproof layer, a bonding part and a coating layer. The thickness of the hard armor plate is arc-shaped. The hard nail pieces are inserted into the insertion holes of the elastic layer and connected with the elastic layer through the bonding parts, and the adjacent nail pieces are in scale-shaped overlapping arrangement.
The hard nail plate has a diameter of 100mm and a thickness of h110mm, the cross section is circular arc, and the distance between the highest point of the circular arc and the bottom edge of the circular arc is h2；h2＝6mm。
The angle theta between the jacks and the base bulletproof layer is 18 degrees. The elastic layer is provided with a plurality of sheet-shaped holes, and the opening width w of the holes is the thickness h of the armor sheet10.95 times of the total weight of the composition. The scale composite armor body is provided with a first direction and a second direction perpendicular to the first direction; the jacks are sequentially arranged along a first direction and a second direction according to a fixed interval; each receptacle is angled at an angle y of 25 deg. to the first direction. The pitch a of adjacent jacks in the first direction (horizontal row) is 0.8 times of l, and the pitch b of adjacent jacks in the second direction (vertical row) is 0.7 times of l.
The preparation method is the same as example 1.
And (3) performance testing:
the bulletproof performance is as follows: and the hard armor plate does not fall off when the test of six consecutive times of impact is carried out in a bending state, which shows that the connection is firm and reliable.
Flexibility: can be bent about 20 deg. towards its front side and about 40 deg. towards its back side. It is shown that when the opening horizontal plane inclination angle θ is higher than the given range, the bending ability is lowered compared to the embodiment.
After-effect injury: the pressure sensor is adopted to test the back pressure of the bullet impact of the bulletproof structure under the support of the daub identification target, and the peak value of the back pressure of the bullet impact of the scale composite armor body in the embodiment is 1.0-2 MPa under six times of impacts of a 7.62mm lead core pistol bullet in 1951 launched by a light tommy gun in 1979, and the range of the back pressure of the bullet impact of the scale composite armor body is close to that of the embodiment. It shows that when the open-pore horizontal tilt angle theta is above a given range, the overall ballistic effectiveness is relatively insignificant, while the armor weight is increased more due to the increased overlap area of the armor.
Comparative example 3
A scale composite armor body comprises a hard armor plate, an elastic layer, a base bulletproof layer, a bonding part and a coating layer. The hard nail plate is an arc-shaped sheet nail plate. The hard nail pieces are inserted into the insertion holes of the elastic layer and connected with the elastic layer through the bonding parts, and the adjacent nail pieces are in scale-shaped overlapping arrangement.
The hard nail plate has a diameter of 40mm and a thickness of h14mm, the cross section is circular arc, and the distance between the highest point of the circular arc and the bottom edge of the circular arc is h2；h2＝6mm。
The angle theta between the jacks and the base bulletproof layer is 15 degrees. The elastic layer is provided with a plurality of sheet-shaped holes, and the opening width w of the holes is the thickness h of the armor sheet10.95 times of. The scale composite armor body is provided with a first direction and a second direction perpendicular to the first direction; the jacks are sequentially arranged along a first direction and a second direction according to a fixed interval; each socket has an angle y of 15 ° to the first direction. The pitch a of adjacent jacks in the first direction (horizontal row) is 0.8 times of l, and the pitch b of adjacent jacks in the second direction (vertical row) is 0.7 times of l.
The preparation method is the same as example 1.
And (3) performance testing:
the bulletproof performance is as follows: and the hard armor plate does not fall off when the test of six consecutive times of impact is carried out in a bending state, which shows that the connection is firm and reliable.
Flexibility: can be bent about 15 deg. towards its front side and about 30 deg. towards its back side. It is shown that the bending ability is lowered in comparison with example 1 when γ is less than the given range.
After-effect injury: the pressure sensor is adopted to test the back pressure of the impact under the support of the daub identification target, the peak value of the back pressure of the impact of the scale composite armor body is 1.3-2.0 MPa under six times of impacts of a 7.62mm lead core pistol bullet launched by a light tommy gun in 1979, and the average value is 1.65MPa, which is similar to the result of the embodiment.
Comparative example 4
A scale composite armor body comprises a hard armor plate, an elastic layer, a base bulletproof layer, a bonding part and a coating layer. The hard armor plate is an arc-shaped flaky armor plate. The hard armor plates are inserted into the insertion holes of the elastic layer and are connected with the elastic layer through the bonding parts through the bottom edges of the hard armor plates, and the adjacent armor plates are overlapped and arranged in a scaly shape.
The hard nail plate has a diameter of 40mm and a thickness of h14mm, the cross section is circular arc, and the distance between the highest point of the circular arc and the bottom edge is h2；h2＝6mm。
The angle theta between the jacks and the base bulletproof layer is 15 degrees. The elastic layer is provided with a plurality of sheet-shaped holes, and the opening width w of the holes is the thickness h of the armor sheet10.95 times of. The scale composite armor body is provided with a first direction and a second direction perpendicular to the first direction; the jacks are sequentially arranged along a first direction and a second direction according to a fixed interval; each receptacle is at an angle y of 40 ° to the first direction. The pitch a of adjacent jacks in the first direction (horizontal row) is 0.8 times of l, and the pitch b of adjacent jacks in the second direction (vertical row) is 0.7 times of l.
The preparation method is the same as example 1.
And (4) performance testing:
the bulletproof performance is as follows: when six consecutive impact tests are carried out in a bending state, the hard armor plate is turned over and falls off, which shows that the connection reliability is reduced when gamma is higher than a given range.
Flexibility: can be bent about 35 deg. towards its front side and about 55 deg. towards its back side.
After-effect injury: the pressure sensor is adopted to test the impact back pressure of the bulletproof structure under the support of the daub identification target, the impact back pressure peak value of the scale composite armor body in the embodiment is 3-5.5 MPa under six impacts of a 7.62mm lead core pistol bullet in 1951 launched by a 1979-type light submachine gun, the range of the embodiment is higher, the connection between the polymer elastic body matrix and the hard armor piece is easy to loosen, and the after effect damage is serious.
Although the present application has been described with reference to preferred embodiments, it is not intended to limit the scope of the claims, and many possible variations and modifications may be made by one skilled in the art without departing from the spirit of the application.
Claims (20)
1. The scale composite armor body is characterized by comprising a substrate bulletproof layer, an elastic layer and a plurality of hard armor sheets;
the elastic layer is arranged on the substrate bulletproof layer;
a plurality of jacks are arranged in the elastic layer and used for fixedly mounting the plurality of hard armor plates;
the hard nail plates are thin plates with the same or different shapes, the hard nail plates are obliquely inserted and fixedly bonded in the jack holes, the part of the hard nail plates embedded in the elastic layer is the bottom of the nail plate, and the part of the hard nail plates on the elastic layer is the upper part of the nail plate;
the included angle between the jacks and the base bulletproof layer is 5-15 degrees;
the upper parts of the nail pieces of the plurality of hard nail pieces are overlapped and arranged along the surface of the scale composite nail body;
the jack is a rectangular or arc-shaped channel matched with the bottom of the hard nail plate;
the width of the cross section of the jack is 0.9-1 time of the thickness of the hard armor plate.
2. The scale composite armor body of claim 1, wherein a surface of said scale composite armor body is further provided with a coating layer.
3. The scale composite armor body of claim 2, wherein said coating layer is made of para-aramid fiber having a strength of greater than 3.5GPa and an elongation of greater than 3.3%.
4. The scale composite armor body of claim 2, wherein said coating layer has an areal density of 350-450 g/m2。
5. The scale composite armor body according to claim 1, wherein said base ballistic layer comprises a plurality of layers of soft ballistic material selected from ultra high molecular weight polyethylene laid fabrics and/or aramid laid fabrics.
6. The scale composite armor body of claim 5, wherein the number of layers of the plurality of layers of soft ballistic material in the base ballistic layer is 10 to 24.
7. The scale composite armor body of claim 5, wherein the number of layers of the plurality of layers of soft ballistic material in the base ballistic layer is 14 to 20.
8. The scale composite armor body of claim 1, wherein said elastic layer has a thickness of 10mm to 20 mm.
9. The scale composite armor body according to claim 8, wherein said elastic layer is selected from materials having a strain rate response in the range of 1-10000 s-1The polymer elastomer of (1).
10. The scale composite armor body according to claim 8, wherein said elastic layer is made of a material selected from the group consisting of foamed materials comprising polyborosiloxane and polyurethane.
11. The scale composite armor body according to claim 1, wherein the thickness of said hard armor plate is 3-5 mm.
12. The scale composite armor body of claim 1, wherein said hard armor plate is made of a material selected from at least one of ceramic, metal, and composite fiber material.
13. The scale composite armor body according to claim 1, wherein said hard armor plate is made of a material selected from carbon fiber composite materials.
14. The scale composite armor body according to claim 13, wherein said carbon fiber composite has a tensile strength of not less than 5GPa and a tensile modulus of not less than 350 GPa.
15. The scale composite armor body of claim 1, wherein said hard armor plate is disk-shaped, said hard armor plate has a diameter of l, said hard armor plate has a thickness of h1；
l：h1The ratio of (A) to (B) is 15: 1-5: 1.
16. the scale composite armor body of claim 1,
the hard nail plate is arc-shaped, the diameter of the hard nail plate is l, and the thickness of the hard nail plate is h1The hard nail plate has a circular arc-shaped section, and the distance between the highest point of the circular arc and the bottom edge of the circular arc is h2；h2：h1The ratio of (A) to (B) is 1.1-1.8: 1.
17. the scale composite armor body of claim 16, wherein i: h is1The ratio of (A) to (B) is 15: 1-5: 1.
18. the scale composite armor body of any one of claims 15 and 16, wherein there is a first direction and a second direction perpendicular to said first direction along a plane of said scale composite armor body;
the jacks are sequentially arranged along the first direction and the second direction at fixed intervals; the included angle between each jack and the first direction is 25-30 degrees.
19. The scale composite armor body according to claim 18, wherein, in the first direction, the distance between two adjacent insertion holes is not more than 0.75-0.85 of l;
and along the second direction, the distance between every two adjacent jacks is not more than 0.65-0.75 of the l.
20. The scale composite armor body of claim 19, wherein, in said first direction, the spacing of two adjacent receptacles is no greater than 0.8 times said/;
along the second direction, the distance between two adjacent jacks is not more than 0.7 times of the l.
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| CN101684992A (en) * | 2008-09-27 | 2010-03-31 | 宁波荣溢化纤科技有限公司 | Bulletproof composite board |
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