Composite panel for armor shielding of vehicles

Abstract

Armor panel comprising an aluminium alloy plate wherein: a) said aluminium alloy has the following chemical composition expressed in percentages per weight: 5.1%≦Zn≦9.7% 1.5%≦Mg≦2.9% 1.2%≦Cu≦2.1% Si≦0.4% Fe≦0.5% Mn≦0.3% Cr≦0.28% Ti≦0.2% Zr≦0.15% b) said plate comprises a face oriented towards the shocks and a face opposite said face oriented towards the shocks coated with a composite reinforcing layer comprising reinforcing fibres or bands with high ballistic protection performance, typically made of high mechanical performance glass, aramid or high performance polyethylene.

1 . Armor panel comprising an aluminium alloy plate wherein:
 a) said aluminium alloy has the following chemical composition expressed in percentages per weight:   5.1%≦Zn≦9.7%   1.5%≦Mg≦2.9%   1.2%≦Cu≦2.1%   Si≦0.4%   Fe≦0.5%   Mn≦0.3%   Cr≦0.28%   Ti≦0.2%   Zr≦0.15%   b) said plate comprises a face adapted to be oriented towards a projectile and a face opposite said face adapted to be oriented towards a projectile coated with a composite reinforcing layer comprising reinforcing fibres or bands with high mechanical performance that confers a high ballistic protection capability on them.   
     
     
         2 . Armor panel according to  claim 1 , wherein the reinforcing fibres or bands with a high ballistic protection capability may be made from one or more materials selected from the group consisting of:
 glass with high mechanical performance optionally R, H, S glass or optionally S2 glass;   aramids, optionally para-aramids;   High Performance PolyEthylenes (HPPE) or Ultra-High Molecular Weight PolyEthylenes (UHMWPE or UHMW).   
     
     
         3 . Armor panel according to  claim 1 , wherein said composite reinforcing layer comprises one or optionally more single-directional or woven fabrics made from threads comprising fibres with a high ballistic protection capability. 
     
     
         4 . Armor panel according to  claim 3  in which said composite reinforcing layer comprises fabric woven from para-aramid threads impregnated with resin. 
     
     
         5 . Armor panel according to  claim 4 , in which said resin is a modified PVB (polyvinyl butyral) phenolic resin. 
     
     
         6 . Armor panel according to  claim 1 , in which the composite reinforcing layer is a stack of hot compressed fabrics. 
     
     
         7 . Armor panel according to  claim 1 , having a thickness of at least 5 mm and at most 50 mm and a mass per unit area of at most 125 kg/m 2 . 
     
     
         8 . Armor panel according to  claim 7 , having a thickness of at least 20 mm and at most 40 mm and a mass per unit area of at most 110 kg/m 2 , and optionally at most 100 kg/m 2 . 
     
     
         9 . Armor panel according to  claim 1 , wherein the mass per unit area of the composite reinforcing layer comprising aramid fibres represents not more than 25%, optionally not more than 15% of the total mass per unit area of the panel. 
     
     
         10 . Armor panel according to  claim 1 , wherein the mass per unit area of the composite reinforcing layer comprising aramid fibres is at least 0.5 kg/m 2 , optionally 1 kg/m 2 , and/or optionally 2 kg/m 2 . 
     
     
         11 . Armor panel according to  claim 1 , wherein mass per unit area of the composite reinforcing layer comprising aramid fibres is at most 25 kg/m 2 , optionally 20 kg/m 2 , and/or optionally 15 kg/m 2 . 
     
     
         12 . Armor panel according to  claim 1 , wherein said plate is made from 7449 alloy, optionally in T651 state. 
     
     
         13 . Armor panel according to  claim 1 , wherein said composite reinforcing layer comprises one or more woven fabrics using Kevlar® 129 coated with polyvinyl butyral (PVB) resin.