Fan case for aircraft engine

Abstract

An annular fan case which covers an outer periphery of a fan in an aircraft engine includes: a case body including a first composite material containing a fiber and a resin; and a containment section including a second composite material containing a fiber and a resin, the containment section being formed on an outer periphery of the case body. A resin content of the containment section is set to be lower than the resin content of the case body.

What is claimed is: 
     
         1 . A fan case for an aircraft engine, for covering an outer periphery of a fan including fan blades, which comprises:
 a case body including a first composite material containing a fiber and a resin; and   a containment section including a second composite material containing a fiber and a resin, the containment section being formed on an outer periphery of the case body, wherein   a resin content of the containment section is set to be lower than a resin content of the case body with non-impregnated portions formed in the containment section.   
     
     
         2 . The fan case as claimed in  claim 1 , wherein
 the containment section is formed on an outer periphery of a portion of the case body which portion faces the fan blades from radially outside.   
     
     
         3 . The fan case as claimed in  claim 1 , wherein
 the fibers in the respective first and second composite materials are identical in composition, and the resins in the respective first and second composite materials are identical in composition.   
     
     
         4 . The fan case as claimed in  claim 1 , wherein
 the resin content of the containment section is 12 to 15% by weight.   
     
     
         5 . The fan case as claimed in  claim 4 , wherein
 the resin content of the case body is 32 to 40% by weight.   
     
     
         6 . The fan case as claimed in  claim 1 , wherein
 the fiber forming the first or second composite material is a fiber selected from a group of carbon fibers, glass fibers and aramid fibers.   
     
     
         7 . The fan case as claimed in  claim 1 , wherein
 the resin forming the first or second composite material is a resin selected from a group of epoxy resins, phenol resins, bismaleimide resins, and polyimide resins.