Impact resistant composite metal structure

Abstract

An impact resistant composite metal structure (IRCMS) loaded by static and dynamic loads has high-strength reinforcing elements embedded in a ductile base member. The present invention gives an opportunity to utilize plastic property of base members in order to increase impact resistance and strength-to-weight ratio of the composite metal structures. The present invention can be applied to building and bridge construction, automotive industry, mining equipment, ship and plane construction; anywhere a structure works under conditions of substantial dynamical forces.

1 . An impact resistant composite metal structure comprising a base member and a plurality of high-strength reinforcing elements embedded in said base member in longitudinal direction.  
   
   
       2 . An impact resistant composite metal structure as defined in  claim 1 , wherein the said reinforcing elements are embedded flush with the surface of the said base member in tensile stress zone and in compression zone if a thickness of the said base member is less than three effective diameters of the said reinforcing elements.  
   
   
       3 . An impact resistant composite metal structure as defined in  claim 1 , wherein the said reinforcing elements in compression stress zone are embedded in channels below surface of the said base member if a thickness of the said base member is more than three effective diameters of the reinforcing elements; the channels in the said base member are milled directly before the reinforcing elements are embedded during the hot rolling of base member, and the channels are pressed in directly after the reinforcing elements are embedded in the channels.  
   
   
       4 . An impact resistant composite metal structure as defined in  claim 1 , wherein said reinforcing elements are spaced from one another by a distance that is a multiple of transverse size of the said reinforcing elements and percent of area of the reinforcing elements from the total cross section area of the composite structure is in a range of 3%-7.5%.  
   
   
       5 . An impact resistant composite metal structure as defined in  claim 1 , wherein the said reinforcing elements are deformed round bars, strands or elements with square, rectangular, triangular or trapezium shape of cross section; the said reinforcing elements are embedded in the base member.  
   
   
       6 . An impact resistant composite metal structure as defined in  claim 1 , wherein the said reinforcing elements are made with bosses distributed around the surface of the reinforcing elements in longitudinal direction.  
   
   
       7 . An impact resistant composite metal structure as defined in  claim 1 , wherein the said reinforcing elements with triangular or trapezium shape of cross section are embedded with widest base of the reinforcing elements at the bottom of the channels.  
   
   
       8 . An impact resistant composite metal structure as defined in  claim 1 , wherein the said base member can be used with all standard wrought forms, including W-beam, structural tubing and pipe or can be assembled from the standard forms as a built-up section.  
   
   
       9 . An impact resistant composite metal structure as defined in  claim 1 , wherein the said base member made of metal plate, the said reinforcing elements are embedded in said base member in longitudinal direction.  
   
   
       10 . An impact resistant composite metal structure as defined in  claim 1 , wherein the said base member is extruded with channels and the said reinforcing elements are embedded in these channels during the extrusion process or right after it.  
   
   
       11 . An impact resistant composite metal structure as defined in  claim 1 , wherein the said the reinforcing elements are embedded in a mould for the base member and a liquid metal is poured into the mould.  
   
   
       12 . An impact resistant composite metal structure as defined in  claim 1 , wherein the said the reinforcing elements are embedded into a cast for the base member and the structure with reinforcing elements is pressed or rolled under high pressure.  
   
   
       13 . An impact resistant composite metal structure as defined in  claim 1 , wherein the said base member made of metal pipe and loaded with eccentric compression loads, said reinforcing elements equally distributed around external perimeter of the pipe in longitudinal direction and they are embedded flush by pressing in during of a hot rolling or extrusion process.  
   
   
       14 . An impact resistant composite metal structure as defined in  claim 1 , wherein the said reinforcing elements are embedded in the pipe base member in a helical longitudinal arrangement.  
   
   
       15 . An impact resistant composite metal structure as defined in  claim 1 , wherein the said reinforcing elements are made as mesh matrix and the matrix is embedded around external surface of the pipe base member by pressing in during a hot rolling process; directions of the reinforcing elements in matrix shall be less than 45 degrees with the longitudinal direction of the pipe.  
   
   
       16 . An impact resistant composite metal structure as defined in claims  1 , wherein the said pipe base member with the embedded reinforcing elements after a cooling is inserted in another hot pipe, having interior diameter tittles more than exterior diameter of the said pipe base member.  
   
   
       17 . An impact resistant composite metal structure as defined in  claim 1 , wherein the said pipe base member with the embedded reinforcing elements filled out with concrete forming a Lally column.