Additive manufacturing mantequilla light armor

Abstract

This invention discloses an additively manufactured mantis shrimp-inspired lightweight armor, relating to the field of armor protection structures. The invention utilizes 3D printing additive manufacturing, employing layer-by-layer printing. Each layer has a pre-reserved cavity of a certain volume fraction, and the layers are rotated at a fixed angle Δθ with adjacent layers, forming a mantis shrimp-like spiral structure in the 3D-printed lightweight armor. During penetration, if a high-speed projectile experiences significant asymmetrical forces when penetrating the internal cavities, it may experience significant deflection or even fracture, reducing penetration capability. The spiral cavity structure ensures that the projectile's impact direction is not entirely filled with cavities, thus preventing reduced protective performance. Due to the presence of the spiral cavities, the material spatial distribution is highly asymmetrical, increasing the possibility of deflection or even fracture during projectile penetration. The spiral cavities also reduce the overall mass of the target plate, improving protective efficiency.

Description

Technical Field

[0001] This invention belongs to the field of armor protection structures, and in particular relates to an additively manufactured lightweight armor modeled after a mantis shrimp. Background Technology

[0002] Existing protective armor mainly uses metals and metal / ceramic / fiber composite armor. All-metal armor mainly consists of high-strength aluminum alloys and high-strength steel; ceramic materials have high strength, are heat-resistant and corrosion-resistant, and are often combined with relatively soft materials such as metals and fibers to form composite armor.

[0003] Existing technologies such as Figure 1 As shown, common composite armor mainly consists of two or three layers; the first layer 1 is metal, the second layer 2 is high-strength ceramic, and the third layer 3 is fiber or metal material; the two-layer structure is similar, except that the first layer 1 is removed; in the second layer 2, large solid ceramic pieces are generally difficult to process, and the surface is covered with square, hexagonal, circular, and other shapes; for example... Figure 2 As shown. For flat tiling with gaps, metal is generally used to fill the gaps. The above technologies have the following disadvantages: (1) In all-metal armor, aluminum alloy has higher protection efficiency under the same protection performance, but its weldability is poor, it is not corrosion resistant, and it is difficult to provide stable protection in complex environments; (2) High-strength steel has a higher protection effect, but the density of steel is large, which makes the protection efficiency of the armor lower, and the heavier armor will also reduce the speed of the combat unit; (3) Although ceramic materials have high strength, they are prone to brittle fracture, and the armor has poor resistance to multiple blows; The proportion of metal, fiber and other filling materials in composite armor is generally small, and they cannot play a major role in the process of resisting penetration.

[0004] Through long-term natural selection, organisms in nature have evolved many structures with excellent mechanical properties, which are often lightweight, strong, and tough. The mantis shrimp's chelicerae can easily crush shells without damaging them, and its chelicerae have good impact resistance. By studying the spiral structure in the mantis shrimp's chelicerae and supplementing it with reasonable structural design, we can provide a good solution for the design of lightweight and highly protective armor. Summary of the Invention

[0005] This invention provides an additively manufactured lightweight armor modeled after a mantis shrimp, which can reduce the overall weight of the target plate while ensuring protective performance.

[0006] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0007] The present invention discloses an additively manufactured lightweight armor resembling a mantis shrimp. The structure is formed by 3D printing additive manufacturing, using a layer-by-layer printing method. Each layer has a certain volume fraction of cavity reserved, and the layers are rotated at a fixed angle Δθ with adjacent layers to form a 3D printed lightweight armor with a mantis shrimp-like spiral structure.

[0008] Each hollow cavity has a certain thickness reserved between the upper and lower surfaces, and the height of the cavity is adjusted according to different spring types.

[0009] Furthermore, the width of the cavity is half the diameter of the corresponding projectile body.

[0010] The present invention has the following advantages over the prior art:

[0011] (1) The 3D additive manufacturing of the mantis shrimp-like lightweight armor of the present invention, during the penetration process, if the high-speed projectile is subjected to a large asymmetrical force when penetrating the internal cavity, it will have a significant deflection effect or even breakage behavior, thus reducing the penetration capability.

[0012] (2) The spiral cavity structure ensures that the projectile will not be entirely in the cavity in the direction of impact, thus reducing the protective performance, no matter which part of the projectile is hit.

[0013] (3) Due to the existence of the helical cavity, the material spatial distribution is highly asymmetrical, which increases the possibility of deflection or even breakage during the penetration of the projectile.

[0014] (4) The presence of the spiral cavity reduces the overall mass of the target plate and improves the protection efficiency.

[0015] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the layer structure of a common ceramic multilayer composite armor.

[0018] Figure 2 for Figure 1 Diagram showing the horizontal tiling pattern of ceramics in multi-layered ceramic composite armor.

[0019] Figure 3 This is a schematic diagram of the structure of the 3D additive manufacturing of the mantis shrimp-inspired lightweight armor of the present invention;

[0020] Figure 4 This is a front view of the structure of the 3D additive manufacturing mantis shrimp-inspired lightweight armor of the present invention, perpendicular to the ballistic direction;

[0021] Figure 5 for Figure 4 AA and BB cross-sections perpendicular to the ballistic direction. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be understood that the terms "layer", "spiral", "cavity", "upper and lower", "surface", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0024] Please see Figure 3-5 As shown, the present invention discloses an additively manufactured mantis shrimp-like lightweight armor. The structure is formed by 3D printing additive manufacturing, which adopts layer-by-layer printing, with each layer reserving a certain volume fraction of cavity, and rotating with adjacent layers at a fixed angle Δθ to form a mantis shrimp-like spiral structure of 3D printed lightweight armor.

[0025] Each hollow cavity has a certain thickness reserved between the upper and lower surfaces, and the height of the cavity is adjusted according to different projectile types; the width of the cavity is 1 / 2 of the diameter of the corresponding projectile body.

[0026] In the 3D additive manufacturing of the mantis shrimp-inspired lightweight armor of this invention, during penetration, if a high-speed projectile is subjected to significant asymmetrical forces when penetrating the internal cavity, it will experience a noticeable deflection effect, or even fracture, thus reducing its penetration capability. On one hand, the helical cavity structure ensures that the projectile's impact direction is not entirely within the cavity, preventing a reduction in protective performance. Due to the presence of the helical cavity, the material spatial distribution is highly asymmetrical, increasing the possibility of projectile deflection or even fracture during penetration. On the other hand, the presence of the helical cavity reduces the overall mass of the target plate, improving protective efficiency.

[0027] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An additively manufactured lightweight armor modeled after a mantis shrimp, characterized in that: The armor is manufactured using 3D printing additive manufacturing. It is printed layer by layer, with each layer having a certain volume fraction of cavity reserved. The layers are rotated at a fixed angle Δθ with the adjacent layers to form a 3D printed lightweight armor with a spiral structure similar to that of a mantis shrimp. A certain thickness is reserved between the cavity and the upper and lower surfaces, and the height of the cavity is adjusted according to different projectile types; the width of the cavity is 1 / 2 of the diameter of the corresponding projectile body; The spiral-shaped distribution of cavities ensures that the projectile will not strike any part of the armor and result in a situation where the entire direction of impact is filled with cavities.

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