ARMOR SYSTEM WITH MULTI-AXIAL REINFORCEMENTS
20200363163 ยท 2020-11-19
Inventors
- Fielder Stanton Lyons (Phoenix, AZ, US)
- Jon Rickey (Havre De Grace, MD, US)
- Erik M. Johnson (Blacklick, OH, US)
Cpc classification
B32B2571/02
PERFORMING OPERATIONS; TRANSPORTING
B32B27/12
PERFORMING OPERATIONS; TRANSPORTING
B32B5/26
PERFORMING OPERATIONS; TRANSPORTING
B32B5/08
PERFORMING OPERATIONS; TRANSPORTING
F41H1/00
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
B32B2262/14
PERFORMING OPERATIONS; TRANSPORTING
F41H5/0428
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
B32B5/18
PERFORMING OPERATIONS; TRANSPORTING
B32B9/005
PERFORMING OPERATIONS; TRANSPORTING
F41H5/0435
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
B32B19/04
PERFORMING OPERATIONS; TRANSPORTING
B32B5/245
PERFORMING OPERATIONS; TRANSPORTING
B32B2262/106
PERFORMING OPERATIONS; TRANSPORTING
B32B2260/021
PERFORMING OPERATIONS; TRANSPORTING
B32B19/06
PERFORMING OPERATIONS; TRANSPORTING
B32B5/12
PERFORMING OPERATIONS; TRANSPORTING
International classification
Abstract
A ceramic composite for an armor system includes a ceramic core, a first reinforcement layer, and a second reinforcement layer. The first reinforcement layer includes a first plurality of reinforcing members, and the first plurality of reinforcing members are arranged within the first reinforcement layer in a first reinforcement orientation. The second reinforcement layer includes a second plurality of reinforcing members, and the second plurality of reinforcing members are arranged within the second reinforcement layer in a second reinforcement orientation. The first reinforcement layer and the second reinforcement layer are attached to the ceramic core such that first reinforcement orientation and the second reinforcement orientation do not align.
Claims
1. A ceramic composite for an armor plate, the ceramic composite comprising: a ceramic core; a first reinforcement layer comprising a first plurality of reinforcing members, wherein the first plurality of reinforcing members are arranged within the first reinforcement layer in a first reinforcement orientation; and a second reinforcement layer comprising a second plurality of reinforcing members, wherein the second plurality of reinforcing members are arranged within the second reinforcement layer in a second reinforcement orientation, wherein the first reinforcement layer and the second reinforcement layer are attached to the ceramic core such that first reinforcement orientation and the second reinforcement orientation do not align.
2. The ceramic composite of claim 1, wherein the ceramic composite comprises a lateral axis and a longitudinal axis, wherein the first reinforcement orientation is a first multi-axial orientation, and wherein at least some of the first plurality of reinforcing members are oriented parallel with the lateral axis and wherein other of the first plurality of reinforcing members are oriented parallel with the longitudinal axis.
3. The ceramic composite of claim 2, wherein the second reinforcement orientation is a second multi-axial orientation, and wherein at least one of the second plurality of reinforcing members is oriented at a first oblique angle relative to the lateral axis and wherein other of the second plurality of reinforcing members is oriented at a second oblique angle relative to the lateral axis that is different from the first oblique angle.
4. The ceramic composite of claim 1, wherein the ceramic composite comprises a lateral axis and a longitudinal axis, wherein the first reinforcement orientation is a first multi-axial orientation, and wherein at least some of the first plurality of reinforcing members are oriented at a first oblique angle relative to the lateral axis and wherein other of the first plurality of reinforcing members are oriented at a second oblique angle relative to the lateral axis that is different from the first oblique angle.
5. The ceramic composite of claim 4, wherein the first oblique angle is 45 and wherein the second oblique angle is 135.
6. The ceramic composite of claim 1, wherein the first reinforcement layer and the second reinforcement layer are on opposing sides of the ceramic core.
7. The ceramic composite of claim 1, wherein the first reinforcement layer and the second reinforcement layer are both on a front side of the ceramic core or on a back side of the ceramic core.
8. The ceramic composite of claim 1, wherein the first reinforcement orientation is offset from the second reinforcement orientation by an angle between 20-70, inclusive.
9. The ceramic composite of claim 1, further comprising a third reinforcement layer comprising a third plurality of reinforcing members, wherein the third plurality of reinforcing members are arranged in a third reinforcement orientation, wherein the third reinforcement layer is attached to the ceramic core such that the third reinforcement orientation does not align with at least one of the first reinforcement orientation or the second reinforcement orientation.
10. The ceramic composite of claim 9, wherein the third reinforcement orientation aligns with at least one of the first reinforcement orientation or the second reinforcement orientation.
11. The ceramic composite of claim 1, wherein the first reinforcement orientation or the second reinforcement orientation is uni-axial.
12. The ceramic composite of claim 1, wherein at least one of the first reinforcement orientation or the second reinforcement orientation is multi-axial.
13. The ceramic composite of claim 1, wherein the first plurality of reinforcing members comprises at least one of fibers, yarns, or tape, and wherein the second plurality of reinforcing members comprises at least one of fibers, yarns, or tape.
14. The ceramic composite of claim 1, wherein the first reinforcement layer comprises a single reinforcement sheet.
15. The ceramic composite of claim 1, wherein the first reinforcement layer comprises a plurality of reinforcement sheets fused together, and wherein each reinforcement sheet of the plurality of reinforcement sheets comprises at least one of the first plurality of reinforcing members.
16. The ceramic composite of claim 1, wherein: a. the first plurality of reinforcing members comprises fibers; b. the first reinforcement layer comprises a plurality of reinforcement sheets each comprising some of the fibers encapsulated within a binder; c. the fibers within each of the plurality of reinforcement sheets are oriented in a single direction; d. the plurality of reinforcement sheets are oriented and stacked relative to each other such that the direction of the fibers in some of the plurality of reinforcement sheets are offset from each other and create the first reinforcement orientation; and e. the plurality of reinforcement sheets are fused together to form the first reinforcement layer.
17. The ceramic composite of claim 1, wherein the first plurality of reinforcing members comprise yarns woven in a warp and weft direction to create the first reinforcement orientation.
18. An armor plate comprising: a front side; a back side; a ceramic composite comprising: a ceramic core; a first reinforcement layer comprising a first plurality of reinforcing members, wherein the first plurality of reinforcing members are arranged within the first reinforcement layer in a first reinforcement orientation; and a second reinforcement layer comprising a second plurality of reinforcing members, wherein the second plurality of reinforcing members are arranged within the second reinforcement layer in a second reinforcement orientation, wherein the first reinforcement layer and the second reinforcement layer are attached to the ceramic core such that first reinforcement orientation and the second reinforcement orientation do not align; and a backing layer positioned between the ceramic composite and the back side.
19. The armor plate of claim 18, further comprising a strike face protection layer, wherein the ceramic composite is positioned between the strike face protection layer and the backing layer.
20. The armor plate of claim 18, further comprising a body side protection layer, wherein the backing layer is positioned between the ceramic composite and the body side protection layer.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0010] The features and components of the following figures are illustrated to emphasize the general principles of the present disclosure. Corresponding features and components throughout the figures can be designated by matching reference characters for the sake of consistency and clarity.
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DETAILED DESCRIPTION
[0026] The subject matter of embodiments of the present invention is described here with specificity to meet statutory requirements, but this description is not necessarily intended to limit the scope of the claims. The claimed subject matter may be embodied in other ways, may include different elements or steps, and may be used in conjunction with other existing or future technologies. This description should not be interpreted as implying any particular order or arrangement among or between various steps or elements except when the order of individual steps or arrangement of elements is explicitly described.
[0027] The figures illustrate various embodiments of a ceramic composite 102 for an armor system 100 according to aspects of the current disclosure. The armor system 100 can be used in various applications to provide protection against various projectiles. For example, the armor system 100 may be used in body armor applications and as protection for different types of vehicles such as various types of land vehicles, ships, and aircraft. In
[0028] As illustrated in
[0029] Referring to
[0030] The ceramic core 112 may be a ceramic formed of a material including, but not limited to glass ceramic, aluminum oxide (Al.sub.2O.sub.3), silicon carbide (SiC), boron carbide (B.sub.4C), SiC/B.sub.4C blends, titanium diboride (TiB.sub.2), ceramic matrix composites, combinations thereof, or other suitable materials.
[0031] As illustrated in
[0032] The reinforcement layers 114A-B can be formed of reinforcing members that are encapsulated within a polymeric binder material. Reinforcing members may include, but are not limited to, fibers, yarns, tapes, combinations thereof, or other suitable reinforcing members. Suitable fibers include, but are not limited to, aramid fibers, carbon fibers, glass fibers, basalt fibers, polypropylene, polyethylene, combinations thereof, or other suitable materials. Suitable binder materials include, but are not limited to, nylon, polyester, polyethylene terephthalate (PET), polyethylene terephthalate glycol-modified (PETG), polypropylene, polyurethane, vinyl ester, epoxy, combinations thereof, or other suitable materials.
[0033] In some embodiments, the fibers are used to form fabrics, such as woven fabrics, knitted fabrics, and nonwoven fabrics. One or more of such fabrics is subsequently encapsulated with the binder material to form a reinforcement layer. In other embodiments, a reinforcement layer is formed by one or more fiber-reinforced polymeric sheets whereby loose fibers are oriented in a desired direction (i.e., are uni-directional or multi-directional) or oriented randomly and then encapsulated within the resin to form the sheet. Note that a single reinforcement layer may be composed of multiple sheets (each sheet including reinforcing members) that are oriented, plied, and fused together with the resin binder to form a reinforcement sheet having the desired reinforcement orientation (discussed below). In some embodiments, at least one reinforcement layer is formed of glass fibers encapsulated within a thermoplastic binder or resin. For example, at least one reinforcement layer may be constructed from a material comprising of epoxy with embedded and continuous glass fibers. In certain cases, the material may contain 70% E-glass fibers such as Style 7781 and 30% toughened epoxy binder such as Toray EP250, although in various other embodiments, other materials, binders, and percentages may be utilized. In still other embodiments, the reinforcement layers are formed with a tape, such as, but not limited to, DuPont Tensylon, or Teijin Endumax.
[0034] In some embodiments, it is preferable to provide two reinforcement layers to strengthen the ceramic core 112, whereby the orientation of the fibers or yarns (in the case of woven and knitted fabrics) or tape between the two reinforcement layers is different. The below discussion refers to reinforcement orientation and is intended to refer to the orientation of any type of reinforcing member used such as the orientation of the fibers, the orientation of the yarns (in the case of woven or knitted fabrics), or the orientation of the tape within a reinforcement layer.
[0035] Each reinforcement layer includes a lateral axis 115 and a longitudinal axis 117. As illustrated in
[0036]
[0037] In other examples, the fibers may be oriented at any desired angle relative to the lateral axis.
[0038] Referring to
[0039] In another example, and as illustrated in
[0040] The reinforcing layers 114 may be joined with the ceramic core 112 through various suitable forming techniques to form the ceramic composite 102. In some embodiments, one or more reinforcing layers are oriented as desired and positioned on the ceramic core 112. The resulting composite is subjected to heat and pressure whereby the encapsulating resin of the reinforcing layer(s) melts and adheres to adjacent reinforcing layers and/or the ceramic core 112. In other embodiments, separate adhesive layers are used to adhere the various layers to each other. In some embodiments, adjacent reinforcing layers are fused or otherwise secured together to form one or more reinforcing composites that are then subsequently secured to the ceramic core 112 in the desired location and orientation.
[0041] The reinforcement layers 114 impart strength, stiffness, and fracture toughness characteristics to the ceramic composite 102 to improve the performance of the ceramic composite 102 upon impact. In certain aspects, the reinforcement layers 114 hold the ceramic core 112 together longer and thus increase projectile dwell time within the ceramic composite 102. In other words, the ceramic core 112 stays intact longer and is thus available to absorb more energy from the impact. The reinforcement layers 114 may also keep the ceramic core 112 intact altogether such that the armor system 100 can withstand multiple projectile impacts. The strength and stiffness imparted to the ceramic composite 102 may also more completely break up a projectile such that less energy is transmitted through the ceramic composite 102, thereby reducing or limiting the BFD and potential harm to the user. Moreover, by orienting the reinforcement layers 114 differently within the ceramic composite 102, fewer reinforcement layers 114 are necessary to achieve the performance improvements. Use of fewer reinforcement layers 114 reduces the weight of the ceramic composite 102.
[0042] The backing layer 104 may be a semi-flexible material that is configured to selectively expand and/or deform to capture any projectile fragments that may make it through the ceramic composite 102. Various suitable materials for the backing layer 104 include, but are not limited to, fiberglass reinforced plastics, aramid reinforced plastics, ultra-high molecular weight polyethylene, polypropylene, combinations thereof, or other suitable fabrics. In addition to the ceramic composite 102 and the backing layer 104, the armor system 100 may also optionally include other components such as the strike face protection layer 106, the body side protection layer 108, and/or the armor covering 110. In certain embodiments, the strike face protection layer 106 may provide protection against blunt impacts (e.g., dropping the armor plate or falling while wearing the armor plate). In some examples, the strike face protection layer 106 is a foam, although other suitable materials may be utilized. The body side protection layer 108 may be provided to further reduce BFD during the projectile impact and provide additional protection to the user. In some cases, the body side protection layer 108 is a foam, although other suitable materials may be utilized. The armor covering 110 may form an outermost layer of the armor system 100 and optionally defines a front side 122 and a back side 124 of the armor system 100. As illustrated in
[0043] A collection of exemplary embodiments, including at least some explicitly enumerated as Examples providing additional description of a variety of example types in accordance with the concepts described herein are provided below. These examples are not meant to be mutually exclusive, exhaustive, or restrictive; and the invention is not limited to these example examples but rather encompasses all possible modifications and variations within the scope of the issued claims and their equivalents.
EXAMPLE 1
[0044] A ceramic composite for an armor plate, the ceramic composite comprising: a ceramic core; a first reinforcement layer comprising a first plurality of reinforcing members, wherein the first plurality of reinforcing members are arranged within the first reinforcement layer in a first reinforcement orientation; and a second reinforcement layer comprising a second plurality of reinforcing members, wherein the second plurality of reinforcing members are arranged within the second reinforcement layer in a second reinforcement orientation, wherein the first reinforcement layer and the second reinforcement layer are attached to the ceramic core such that first reinforcement orientation and the second reinforcement orientation do not align.
EXAMPLE 2
[0045] The ceramic composite of any preceding or subsequent examples or combination of examples, wherein the ceramic composite comprises a lateral axis and a longitudinal axis, wherein the first reinforcement orientation is a first multi-axial orientation, and wherein at least some of the first plurality of reinforcing members are oriented parallel with the lateral axis and wherein other of the first plurality of reinforcing members are oriented parallel with the longitudinal axis.
EXAMPLE 3
[0046] The ceramic composite of any preceding or subsequent examples or combination of examples, wherein the second reinforcement orientation is a second multi-axial orientation, and wherein at least one of the second plurality of reinforcing members is oriented at a first oblique angle relative to the lateral axis and wherein other of the second plurality of reinforcing members is oriented at a second oblique angle relative to the lateral axis that is different from the first oblique angle.
EXAMPLE 4
[0047] The ceramic composite of any preceding or subsequent examples or combination of examples, wherein the ceramic composite comprises a lateral axis and a longitudinal axis, wherein the first reinforcement orientation is a first multi-axial orientation, and wherein at least some of the first plurality of reinforcing members are oriented at a first oblique angle relative to the lateral axis and wherein other of the first plurality of reinforcing members are oriented at a second oblique angle relative to the lateral axis that is different from the first oblique angle.
EXAMPLE 5
[0048] The ceramic composite of any preceding or subsequent examples or combination of examples, wherein the first oblique angle is 45 and wherein the second oblique angle is 135.
EXAMPLE 6
[0049] The ceramic composite of any preceding or subsequent examples or combination of examples, wherein the first reinforcement layer and the second reinforcement layer are on opposing sides of the ceramic core.
EXAMPLE 7
[0050] The ceramic composite of any preceding or subsequent examples or combination of examples, wherein the first reinforcement layer and the second reinforcement layer are both on a front side of the ceramic core or on a back side of the ceramic core.
EXAMPLE 8
[0051] The ceramic composite of any preceding or subsequent examples or combination of examples, wherein the first reinforcement orientation is offset from the second reinforcement orientation by an angle between 20-70, inclusive.
EXAMPLE 9
[0052] The ceramic composite of any preceding or subsequent examples or combination of examples, further comprising a third reinforcement layer comprising a third plurality of reinforcing members, wherein the third plurality of reinforcing members are arranged in a third reinforcement orientation, wherein the third reinforcement layer is attached to the ceramic core such that the third reinforcement orientation does not align with at least one of the first reinforcement orientation or the second reinforcement orientation.
EXAMPLE 10
[0053] The ceramic composite of any preceding or subsequent examples or combination of examples, wherein the third reinforcement orientation aligns with at least one of the first reinforcement orientation or the second reinforcement orientation.
EXAMPLE 11
[0054] The ceramic composite of any preceding or subsequent examples or combination of examples, wherein the third reinforcement orientation does not align with either the first reinforcement orientation or the second reinforcement orientation.
EXAMPLE 12
[0055] The ceramic composite of any preceding or subsequent examples or combination of examples, wherein at least one of the first reinforcement orientation or the second reinforcement orientation is uni-axial.
EXAMPLE 13
[0056] The ceramic composite of any preceding or subsequent examples or combination of examples, wherein at least one of the first reinforcement orientation or the second reinforcement orientation is multi-axial.
EXAMPLE 14
[0057] The ceramic composite of any preceding or subsequent examples or combination of examples, wherein at least one of the first reinforcement orientation or the second reinforcement orientation is bi-axial.
EXAMPLE 15
[0058] The ceramic composite of any preceding or subsequent examples or combination of examples, wherein the first plurality of reinforcing members comprises at least one of fibers, yarns, or tape, and wherein the second plurality of reinforcing members comprises at least one of fibers, yarns, or tape.
EXAMPLE 16
[0059] The ceramic composite of any preceding or subsequent examples or combination of examples, wherein the first reinforcement layer comprises a single reinforcement sheet.
EXAMPLE 17
[0060] The ceramic composite of any preceding or subsequent examples or combination of examples, wherein the first reinforcement layer comprises a plurality of reinforcement sheets fused together, and wherein each reinforcement sheet of the plurality of reinforcement sheets comprises at least one of the first plurality of reinforcing members.
EXAMPLE 18
[0061] The ceramic composite of any preceding or subsequent examples or combination of examples, wherein: the first plurality of reinforcing members comprises fibers; the first reinforcement layer comprises a plurality of reinforcement sheets each comprising some of the fibers encapsulated within a binder; the fibers within each of the plurality of reinforcement sheets are oriented in a single direction; the plurality of reinforcement sheets are oriented and stacked relative to each other such that the direction of the fibers in some of the plurality of reinforcement sheets are offset from each other and create the first reinforcement orientation; and the plurality of reinforcement sheets are fused together to form the first reinforcement layer.
EXAMPLE 19
[0062] The ceramic composite of any preceding or subsequent examples or combination of examples, wherein the first plurality of reinforcing members comprise yarns woven in a warp and weft direction to create the first reinforcement orientation.
EXAMPLE 20
[0063] An armor plate comprising: a front side; a back side; a ceramic composite comprising: a ceramic core; a first reinforcement layer comprising a first plurality of reinforcing members, wherein the first plurality of reinforcing members are arranged within the first reinforcement layer in a first reinforcement orientation; and a second reinforcement layer comprising a second plurality of reinforcing members, wherein the second plurality of reinforcing members are arranged within the second reinforcement layer in a second reinforcement orientation, wherein the first reinforcement layer and the second reinforcement layer are attached to the ceramic core such that first reinforcement orientation and the second reinforcement orientation do not align; and a backing layer positioned between the ceramic composite and the back side.
EXAMPLE 21
[0064] The armor plate of any preceding or subsequent examples or combination of examples, further comprising a strike face protection layer, wherein the ceramic composite is positioned between the strike face protection layer and the backing layer.
EXAMPLE 22
[0065] The armor plate of any preceding or subsequent examples or combination of examples, further comprising a body side protection layer, wherein the backing layer is positioned between the ceramic composite and the body side protection layer.
EXAMPLE 23
[0066] The armor plate of any preceding or subsequent examples or combination of examples, further comprising an armor covering, wherein the armor covering defines the front side and the back side of the armor plate, and wherein the ceramic composite and the backing layer are retained within the armor covering.
EXAMPLE 23
[0067] The armor plate of any preceding or subsequent examples or combination of examples, wherein the first reinforcement layer and the second reinforcement layer are on opposing sides of the ceramic core.
EXAMPLE 24
[0068] The armor plate of any preceding or subsequent examples or combination of examples, wherein the first reinforcement layer and the second reinforcement layer are on both on a front side of the ceramic core or a back side of the ceramic core.
EXAMPLE 25
[0069] The armor plate of any preceding or subsequent examples or combination of examples, wherein at least one of the first reinforcement orientation or the second reinforcement orientation is uni-axial.
EXAMPLE 26
[0070] The armor plate of any preceding or subsequent examples or combination of examples, wherein at least one of the first reinforcement orientation or the second reinforcement orientation is multi-axial.
EXAMPLE 27
[0071] The armor plate of any preceding or subsequent examples or combination of examples, wherein at least one of the first reinforcement orientation or the second reinforcement orientation is bi-axial.
EXAMPLE 28
[0072] A ceramic composite for an armor plate, the ceramic composite comprising: a lateral axis and a longitudinal axis; a ceramic core; a first reinforcement layer comprising a first plurality of reinforcing members, wherein the first plurality of reinforcing members are arranged within the first reinforcement layer in a first reinforcement orientation; and a second reinforcement layer comprising a second plurality of reinforcing members, wherein the second plurality of reinforcing members are arranged within the second reinforcement layer in a second reinforcement orientation, wherein the first reinforcement layer and the second reinforcement layer are attached to the ceramic core such that first reinforcement orientation and the second reinforcement orientation do not align, wherein the first reinforcement orientation is a first multi-axial orientation, and wherein at least one of the first plurality of reinforcing members is oriented parallel with the lateral axis and wherein at least one of the first plurality of reinforcing members is oriented parallel with the longitudinal axis.
EXAMPLE 29
[0073] The ceramic composite of any preceding or subsequent examples or combination of examples, wherein the second reinforcement orientation is a second multi-axial orientation, and wherein at least one of the second plurality of reinforcing members is oriented at a first oblique angle relative to the lateral axis and wherein at least one of the second plurality of reinforcing members is oriented at a second oblique angle relative to the lateral axis that is different from the first oblique angle.
EXAMPLE 30
[0074] A ceramic composite for an armor plate, the ceramic composite comprising: a lateral axis and a longitudinal axis; a ceramic core; a first reinforcement layer comprising a first plurality of reinforcing members, wherein the first plurality of reinforcing members are arranged within the first reinforcement layer in a first reinforcement orientation; and a second reinforcement layer comprising a second plurality of reinforcing members, wherein the second plurality of reinforcing members are arranged within the second reinforcement layer in a second reinforcement orientation, wherein the first reinforcement layer and the second reinforcement layer are attached to the ceramic core such that first reinforcement orientation and the second reinforcement orientation do not align, wherein the first reinforcement orientation is a first multi-axial orientation, and wherein at least some of the first plurality of reinforcing members are oriented at a first oblique angle relative to the lateral axis and wherein at least some of the first plurality of reinforcing members are oriented at a second oblique angle relative to the lateral axis that is different from the first oblique angle.
[0075] The foregoing is provided for purposes of illustrating, explaining, and describing embodiments of the present invention. Further modifications and adaptations to these embodiments will be apparent to those skilled in the art and may be made without departing from the scope or spirit of the invention. Different arrangements of the components depicted in the drawings or described above, as well as components and steps not shown or described are possible. Similarly, some features and subcombinations are useful and may be employed without reference to other features and subcombinations. Embodiments of the invention have been described for illustrative and not restrictive purposes, and alternative embodiments will become apparent to readers of this patent. Accordingly, the present invention is not limited to the embodiments described above or depicted in the drawings, and various embodiments and modifications can be made without departing from the scope of the invention.