Perforated armor plates

Abstract

A system of armor plates is adapted for protection of a structure against projectiles B and S of two characteristic calibers D B and D S , D B >D S . The system compres a main armor plate and an auxiliary plate mounted in front of the main armor plate at a distance therefrom. The auxiliary plate comprises a plate made of ballistic material and perforated with through holes of characteristic diameter D, 1.2 D B >D>1.2 D S . At least one hard-material body of diameter D H is disposed in each of the holes, such that the auxiliary plate provides at least destabilization of impacting projectiles S capable of free passage through an unobstructed hole of diameter D.

1 . A system of armor plates for protection of a structure against projectiles B and S of two characteristic calibers D B  and D S , D B >D S , the system comprising a main armor plate and an auxiliary plate mounted in front of said main armor plate at a distance (stand-off) therefrom, 
 wherein said auxiliary plate comprises a perforated plate made of ballistic material and perforated with through holes of characteristic diameter D, 1.2 D B >D>1.2 D S , and    at least one hard-material body disposed in each of said holes, such that said auxiliary plate provides at least destabilization of impacting projectiles S capable of free passage through an unobstructed hole of diameter D.    
   
   
       2 . The system of  claim 1 , wherein said body has diameter D H  which is not less than D−D S .  
   
   
       3 . The system of  claim 1 , wherein said auxiliary armor plate is connected to said main armor plate by a plurality of metallic bolts or pins or brackets.  
   
   
       4 . The system of  claim 1 , wherein the space between said auxiliary armor plate and said main armor plate is free.  
   
   
       5 . The system of  claim 1 , wherein the space between said auxiliary armor plate and said main armor plate is at least partially filled with a non-ballistic material.  
   
   
       6 . The system of  claim 5 , wherein said non-ballistic material is a honeycomb structure.  
   
   
       7 . The system of  claim 1  constructed of panels comprising said main armor plate and said auxiliary armor plate fixed at said stand-off therefrom, said panels being adapted for mounting on said structure.  
   
   
       8 . An armor panel for constructing the system of  claim 1 , said panel comprising said main armor plate and said auxiliary armor plate fixed at said distance L therefrom, said panel being adapted for mounting on said structure.  
   
   
       9 . An auxiliary armor plate for use in a system of armor plates for protection of a structure against projectiles B and S of two characteristic calibers D B  and D S , D B >D S , the system further comprising a main armor plate, said auxiliary armor plate being adapted for mounting in front of said main armor plate at a distance therefrom, 
 wherein said auxiliary plate comprises a perforated plate made of ballistic material and perforated with through holes of characteristic diameter D, 1.2 D B >D>1.2 D S , and    at least one hard-material body disposed in each of said holes, so that said auxiliary plate provides at least destabilization of impacting projectiles S capable of free passage through an unobstructed hole of diameter D.    
   
   
       10 . The auxiliary plate of  claim 9 , wherein said body has a diameter D H  which is not less than D−D S .  
   
   
       11 . The auxiliary plate of  claim 9 , wherein said carrying plate is made of ballistic steel.  
   
   
       12 . The auxiliary plate of  claim 9 , wherein said holes are disposed with center-to-center spacing from 1.2 D to 1.9 D.  
   
   
       13 . The auxiliary plate of  claim 12 , wherein said holes are disposed in a regular array.  
   
   
       14 . The auxiliary plate of  claim 10 , wherein said hard-material bodies are made of ceramics.  
   
   
       15 . The auxiliary plate of  claim 10 , wherein said hard-material bodies are fixed in said holes by plastic resin or aluminum.  
   
   
       16 . The auxiliary plate of  claim 9 , further comprising at least one front and/or rear layer of material bonded thereto so as to fix the hard-material bodies in said holes.  
   
   
       17 . The auxiliary plate of  claim 16 , wherein said at least one layer is one or more of the following: fiberglass, aramid fabric, metallic sheet, carbon or other fibers in hard matrix.  
   
   
       18 . An add-on armor kit comprising the auxiliary armor plate of  claim 9  and an instruction for use thereof in said system of armor plates.  
   
   
       19 . The add-on armor kit of  claim 18 , further comprising means for mounting said auxiliary armor plate on said structure.