JPH04222398A - Armor plate - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bulletproof plate that has a high resistance to penetration by armored shells and the like.

0002

2. Description of the Related Art For the outer panels of tanks, special vehicles, special ships, etc., it is necessary to use bulletproof plates that have high resistance to penetration by armor-removal shells and the like. Conventionally, bulletproof plates have been made by simply increasing the thickness of a steel plate or by dispersing reinforcing fibers within the steel plate.

0003

However, with the technique of simply increasing the thickness of a steel plate, in order to obtain an excellent bulletproof effect, the thickness of the steel plate must be increased. If this thick steel plate were used as a bulletproof plate in tanks, etc., the increased weight would significantly reduce maneuverability.

[0004] Furthermore, the technique of dispersing reinforcing fibers within a steel plate requires high manufacturing costs and cannot be said to provide a commensurate bulletproof effect.

An object of the present invention, which was created in consideration of the above circumstances, is to provide a bulletproof board that is inexpensive, lightweight, and exhibits excellent bulletproof effects.

[0006]

[Means for Solving the Problems] In order to achieve the above object, a bulletproof plate according to the present invention is constructed by laminating steel plates with a ceramic layer sandwiched between them.

[0007]

[Effect] When an armor-removal bullet or the like is driven into the bulletproof plate with the above structure, the ceramic layer between the steel plates spreads in a conical shape from the point of impact toward the rear in the plate thickness direction and is damaged, and the unit area affected by the rear steel plate is The impact force (impact stress) per area becomes smaller. Therefore, the bulletproof effect is enhanced.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 2, this bulletproof plate 1 is constructed by laminating two steel plates 2a and 2b with a ceramic layer 3 sandwiched between them. The steel plates 2a and 2b are made of highly bulletproof material such as high-tensile steel or ultra-strong steel, and the ceramic layer 3 is made of hard ceramic such as sintered silicon carbide or silicon nitride.

Furthermore, the ratio of the thickness of the steel plates 2a, 2b to the thickness of the ceramic layer 3 is about 1:3, and these steel plates 2a, 2b and the ceramic layer 3 are firmly bonded with an adhesive. has been done.

The operation of this embodiment will be described.

As shown in FIG. 1, when a demolition bullet 4 or the like is driven into the bulletproof plate 1, the ceramic layer 3 between the steel plates 2a and 2b spreads in a conical shape from the point of impact 5 toward the rear in the thickness direction. damage. This is a unique feature of brittle materials such as ceramics. According to an experiment, 200 iron balls with a diameter of 1 mm were placed on the ceramic layer 3 made of silicon carbide.
When it was driven at m/s, the damage spread angle θ (the apex angle of the cone) became about 90 degrees, and the damaged part did not fall apart but fell out of the ceramic layer 3 in a conical shape.

[0013] In this way, the impact force of the armor-removal bullet 4 when it lands on the front steel plate 2a spreads conically and is dispersed to the rear, so that the impact force per unit area (impact) received by the rear steel plate 2b is reduced. stress) becomes smaller. In other words, the front steel plate 2
The impact force of the demolished shell 4 received at one point at point a is dispersed according to the damage spread angle θ, and is received over a wide area on the rear steel plate 2b. Therefore, the large area resists penetration by the armor-removal bullet 4, and the bulletproof effect is enhanced.

[0014] Moreover, this bulletproof plate 1 is similar to the existing steel plates 2a,
2b and the ceramic layer 3, it can be manufactured at a relatively low cost, and has good cost performance when manufacturing cost and bulletproof effect are considered.

[0015] Furthermore, the bulletproof plate 1 has a ceramic layer 3, which is much lighter than iron, interposed between the steel plates 2a and 2b, so it can be constructed lightweight, and it can be used as an outer plate of a tank or the like. When applied, the reduction in mobility due to increased weight can be minimized.

The bulletproof plate 1 is used for the outer plates of tanks, special vehicles, special ships, etc., as well as for the upper plates of storage tanks.
It may also be used as a protective wall on the side panels. Further, in order to further enhance the bulletproof effect, a multilayer structure may be formed by alternately laminating the steel plates 2a, 2b and the ceramic layer 3 in multiple layers.

[0017]

[Effects of the Invention] As explained above, the bulletproof board according to the present invention is inexpensive, lightweight, and can exhibit excellent bulletproof effects.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing a situation when a demolished bullet lands on a bulletproof plate showing an embodiment of the present invention.

FIG. 2 is a sectional view of the bulletproof plate.

[Explanation of symbols]

1　Bulletproof plate 2a Steel plate 2b Steel plate 3 Ceramic layer

Claims (1)

[Claims] 1. A bulletproof plate characterized by laminating a ceramic layer between steel plates.