Fracturing and materials based impact reactive projectiles

Abstract

Various embodiments of projectiles are described. In one embodiment, a projectile includes a projectile core having a central recess formed therein, the central recess including a conical recess portion and a cylindrical recess portion. According to certain aspects, the projectile core may include a core base, and the central recess of the projectile core may extend from a leading circumferential rim of the projectile core to the core base along an axis of symmetry of the projectile core. The projectile core may further include projectile fingers each separated by a kerf, extending longitudinally from the core base to the leading circumferential rim, and extending radially apart from the axis of symmetry between an outer periphery of the central recess to an outer periphery surface of the core, and a nylon tip including a spherical nose, a conical taper portion, and a cylindrical anchor pin.

At least the following is claimed: 
     
         1 . A projectile, comprising:
 a projectile core having a central recess formed therein, the central recess including a conical recess portion and a cylindrical recess portion, the projectile core comprising:
 a core base, wherein the central recess extends from a circumferential meplat rim of the projectile core to the core base along an axis of symmetry of the projectile core; and 
 a plurality of projectile fingers each separated by a kerf, the plurality of projectile fingers extending longitudinally from the core base to the circumferential meplat rim and extending radially away from the axis of symmetry between the central recess and an outer periphery surface of the projectile core; and 
   a tip including a nose, a conical taper portion, and a cylindrical anchor pin.   
     
     
         2 . The projectile according to  claim 1 , wherein
 the cylindrical anchor pin of the tip is lodged inside the cylindrical recess portion of the central recess; and   the conical taper portion of the tip occupies the conical recess portion of the central recess.   
     
     
         3 . The projectile according to  claim 1 , wherein
 each of the plurality of projectile fingers includes a plurality of surfaces;   at least two of the plurality of surfaces are substantially flat; and   at least another two of the plurality of surfaces are curved.   
     
     
         4 . The projectile according to  claim 1 , wherein each of the plurality of projectile fingers includes a partial conical surface. 
     
     
         5 . The projectile according to  claim 1 , wherein the projectile core is formed from a single piece of stock material. 
     
     
         6 . The projectile according to  claim 5 , wherein the projectile core is formed from brass or bronze. 
     
     
         7 . The projectile according to  claim 1 , wherein the nose of the tip is substantially semispherical. 
     
     
         8 . The projectile according to  claim 1 , wherein the nose of the tip is substantially flat. 
     
     
         9 . The projectile according to  claim 1 , wherein, along the axis of symmetry of the projectile core, the core base extends less than thirty percent of a length of the projectile core. 
     
     
         10 . The projectile according to  claim 1 , wherein the conical taper portion of the tip meets the cylindrical anchor pin of the tip with an angle of about 135 degrees between a surface of the conical taper portion and a surface of the cylindrical anchor pin. 
     
     
         11 . A projectile, comprising:
 a projectile core having a central recess formed therein, the projectile core comprising:
 a core base, wherein the central recess extends from a circumferential meplat rim of the projectile core to the core base along an axis of symmetry of the projectile core; and 
 a plurality of projectile fingers separated from each other, the plurality of projectile fingers extending longitudinally from the core base to the circumferential meplat rim; and 
   a tip including a nose.   
     
     
         12 . The projectile according to  claim 11 , wherein the plurality of projectile fingers extend radially away from the axis of symmetry between the central recess and an outer periphery surface of the projectile core. 
     
     
         13 . The projectile according to  claim 11 , wherein
 the central recess includes a conical recess portion and a cylindrical recess portion; and   the tip includes a conical taper portion and a cylindrical anchor pin.   
     
     
         14 . The projectile according to  claim 11 , wherein
 each of the plurality of projectile fingers includes a plurality of surfaces;   at least two of the plurality of surfaces are substantially flat; and   at least another two of the plurality of surfaces are curved.   
     
     
         15 . The projectile according to  claim 11 , wherein
 the projectile core further comprises a plurality of undercuts about an outer periphery of the projectile core; and   a kerf separates each of the plurality of projectile fingers and extends longitudinally from the circumferential meplat rim of the projectile core toward the core base and across at least one of the plurality of undercuts.   
     
     
         16 . A projectile, comprising:
 a projectile core having a central recess formed therein, the projectile core comprising:
 a core base, wherein the central recess extends from a circumferential meplat rim of the projectile core to the core base along an axis of symmetry of the projectile core; and 
 a plurality of projectile fingers separated from each other, the plurality of projectile fingers extending longitudinally from the core base to the circumferential meplat rim; and 
   a tip including a nose, wherein, along the axis of symmetry, the core base extends less than thirty percent of a length of the projectile core.   
     
     
         17 . The projectile according to  claim 16 , wherein the plurality of projectile fingers extend radially away from the axis of symmetry between the central recess and an outer periphery surface of the projectile core. 
     
     
         18 . The projectile according to  claim 16 , wherein
 the central recess includes a conical recess portion and a cylindrical recess portion; and   the tip includes a conical taper portion and a cylindrical anchor pin.   
     
     
         19 . The projectile according to  claim 16 , wherein each of the plurality of projectile fingers includes a partial conical surface. 
     
     
         20 . The projectile according to  claim 16 , wherein the projectile core is formed from a single piece of brass or bronze stock material.