Armature for composite and polymeric materials domain of the invention

Abstract

The present invention consists of an assembly of materials, particularly wood-plastic composite or polymer for construction or building purposes, consisting in a matrix of these materials wherein a rod is inserted, a cable or a chord of reinforcement in a place of the tension loads, to increase the total capacity of mechanical resistance of the assembly and more particularly flexural properties. The invention thus consists of a solidified matrix using one or several rods inserted in the matrix so that the rod takes the tension stresses to increasing resistance to bending. A hardening resin may be injected in the place of a rod, or combined with it. The rods are inserted in the area undergoing the maximum of tension or at any other place in order to offer durability and an increased resistance. Various configurations of assemblies can be used, such as for example, a T, an I, a M, a H or any other form of section.

1 . A structural assembly ( 20 ) of a wood-plastic composite comprising: 
 a structural matrix ( 40 ) of wood-plastic composite comprising a section area ( 42 ) and one longitudinal spread ( 44 ), said section area comprising a low part ( 46 ) prone to tension loads when said low part is in inflection, said section area and said spread defining a volume of a first material having a first coefficient of expansion,    a reinforcing rod ( 48 ) comprising a length corresponding to said longitudinal spread and an external surface ( 50 ) comprising means of contact with said first material of said matrix and an internal composition defining a second material having a second coefficient of expansion sensibly equal to said first coefficient of expansion,    said second material having a tensile strength at least larger than a resistance of said first material reinforcing said structural assembly.    
   
   
       2 . The structural assembly ( 20 ) of composite wood-plastic of  claim 1  wherein said low part ( 46 ) comprises a contact surface ( 53 ) comprising means of contact with said matrix, thus carrying out a fortification of said structural part.  
   
   
       3 . The structural assembly ( 20 ) of  claim 1  wherein said structural matrix has a surface of U-shaped section reversed ( 26 ).  
   
   
       4 . The structural assembly ( 20 ) of  claim 1  wherein said structural matrix has a section area in a form of T ( 27 ).  
   
   
       5 . The structural assembly ( 20 ) of  claim 1  wherein said structural matrix has a section area in the form of M ( 25 ).  
   
   
       6 . The structural assembly ( 20 ) of  claim 1  wherein said structural matrix has a section area in the form of H.  
   
   
       7 . The structural assembly ( 20 ) of  claim 1  wherein said reinforcing rod ( 48 ) forms part of a foot section ( 33 ) of said low part ( 46 ), in a zone of maximum tension.  
   
   
       8 . The structural assembly ( 20 ) of  claim 1  wherein said reinforcing rod ( 48 ) is positioned in a central part ( 32 ) along a neutral axis of inertia.  
   
   
       9 . The structural assembly ( 20 ) of  claim 1  wherein said reinforcing rod ( 48 ) forms part of a upper part ( 31 ) in compression.  
   
   
       10 . The structural assembly ( 20 ) of  claim 1  wherein two reinforcing rods form part of said low part.  
   
   
       11 . The structural assembly ( 20 ) of  claim 1  wherein said reinforcing rod comprises a surface ( 50 ) having means of contact allowing the use of a rod adhesive ( 52 ) to give a grip of said rod to said structural matrix.  
   
   
       12 . The structural assembly ( 20 ) of  claim 1  wherein said surface of said reinforcing rod comprises means of contact in screw pitch ( 57 ) to provide biting from said rod to said structural matrix.  
   
   
       13 . The structural assembly ( 20 ) of  claim 1  wherein said means of contact are grooved ( 55 ) to give a grip from said rod to said structural matrix.  
   
   
       14 . The structural assembly ( 20 ) of  claim 1  wherein said rod comes from a group of fibrous materials comprising glass fibre, carbon fibre and fibre of Kevlar.  
   
   
       15 . The structural assembly ( 20 ) of  claim 1  wherein said structural matrix is produced in pultrusion, extrusion, rolling, coextrusion with a resin.  
   
   
       16 . The structural assembly ( 20 ) of  claim 1  wherein said second material is at least 1.5 times more resistant in tension than said first material.  
   
   
       17 . A structural part comprising: 
 a structural matrix ( 40 ) having with a section area( 42 ) and a longitudinal spread ( 44 ) said section area comprising a lower part ( 46 ) prone to tension loads, said section area and said spread defining a volume of a first material having a first coefficient of expansion,    a reinforcing rod ( 48 ) comprising a length corresponding to said longitudinal spread and a rod surface ( 50 ) comprising means of contact with said first material of said matrix and an internal composition defining a second material having a second coefficient of expansion compatible with said first coefficient,    said second material having a tensile strength appreciably larger than resistance of said first material reinforcing said structural part.    
   
   
       18 . A reinforced structural part ( 20 ) comprising; 
 a structural body ( 40 ) composed of a first material, having a first coefficient of expansion,    a reinforcing rod ( 48 ) composed of a second material having a second coefficient of expansion compatible with said first coefficient and more resistant in tension than said first material,    means of insertion of said reinforcing rod in said structural body in order to carry out the reinforcement of said structural part.    said structural body comprising a low part comprising at least one reinforcing rod ( 48 ) to prevent the camber of said structural part and to ensure a greater resistance in tension.    
   
   
       19 . The reinforced structural part of  claim 18  in which said principal body comprises a higher part, a central part and a lower part and of which form part at least a needle rod ( 49 ) and one higher reinforcing rod.  
   
   
       20 . A lengthened structural part ( 60 ) of composite wood-plastic comprising a long body ( 62 ) comprising an axis of inertia ( 64 ) and one lower protuberance ( 66 ) subjected to tension loads, said protuberance comprising a reinforcing rod ( 48 ) intended to support tension efforts preferentially.