Composite material structure and manufacturing method of composite material structure

Abstract

According to one implementation, a composite material structure includes a corrugated stringer and a panel. The corrugated stringer has a corrugated structure including portions each having hat-shaped cross section. The corrugated stringer is made of a composite material. The panel is integrated with the corrugated stringer. The is made of a composite material. Further, according to one implementation, a manufacturing method of a composite material structure includes: setting a textile on a laminated body of prepregs; and producing the composite material structure by covering the laminated body with a bagging film, forming a vacuum state in a space covered with the bagging film, impregnating the textile with the resin, and thermal curing of the laminated body of the prepregs. The laminated body is a panel before curing. The textile has a structure corresponding to a corrugated stringer.

What is claimed is: 
     
         1 . A composite material structure comprising:
 a stringer having a corrugated structure including portions each having hat-shaped cross section, the stringer being made of a composite material; and   a panel integrated with the stringer, the panel being made of a composite material,   wherein a foamed core material is filled inside each of the portions each having the hat-shaped cross section.   
     
     
         2 . A composite material structure comprising:
 a stringer having a corrugated structure including portions each having hat-shaped cross section, the stringer being made of a composite material; and   a panel integrated with the stringer, the panel being made of a composite material,   wherein the stringer is made of a composite material which is reinforced by woven fibers of which length directions include a board thickness of the stringer and a direction perpendicular to the board thickness of the stringer.   
     
     
         3 . The composite material structure according to  claim 2 ,
 wherein a foamed core material is filled inside each of the portions each having the hat-shaped cross section.   
     
     
         4 . The composite material structure according to  claim 1 ,
 wherein the stringer is integrated with the panel without fasteners.   
     
     
         5 . The composite material structure according to  claim 1 ,
 wherein both ends of each of the portions each having the hat-shaped cross section are occluded.   
     
     
         6 . A manufacturing method of a composite material structure comprising:
 setting a textile on a laminated body of prepregs for molding out of an autoclave, the prepregs including fibers which can be impregnated with a resin by a vacuum pressure, the laminated body being a panel before curing, the textile having a structure corresponding to a stringer having a corrugated structure including portions each having a hat-shaped cross section; and   producing the composite material structure by covering the laminated body of the prepregs, on which the textile has been set, with a bagging film, forming a vacuum state in a space covered with the bagging film, impregnating the textile, in the vacuum state, with the resin, and thermal curing of the laminated body of the prepregs on which the textile impregnated with the resin has been set, the composite material structure having a structure where the stringer is attached on the panel.   
     
     
         7 . The manufacturing method of the composite material structure according to  claim 6 , further comprising:
 filling a foamed core material inside each of the portions each having the hat-shaped cross section, before at least forming the vacuum state in the space covered with the bagging film.   
     
     
         8 . The manufacturing method of the composite material structure according to  claim 6 ,
 wherein integrating the textile with the laminated body of the prepregs and curing the laminated body of the prepregs on which the textile has been set are performed by forming the vacuum state in the space covered with the bagging film and heating the laminated body of the prepregs on which the textile has been set.   
     
     
         9 . The manufacturing method of the composite material structure according to  claim 7 ,
 wherein both ends of each of the portions, each having the hat-shaped cross section, inside each of which the foamed core material has been filled are occluded so that the composite material structure can be used as a part of a fuel tank of an aircraft.   
     
     
         10 . The manufacturing method of the composite material structure according to  claim 6 ,
 wherein a jig that supports each of the portions, each having the hat-shaped cross section, from an inside and can be removed after curing the laminated body of the prepregs on which the textile has been set is set inside each of the portions before at least forming the vacuum state in the space covered with the bagging film, and   the jig is removed after curing the laminated body of the prepregs on which the textile has been set.   
     
     
         11 . The composite material structure according to  claim 2 ,
 wherein the stringer is integrated with the panel without fasteners.   
     
     
         12 . The composite material structure according to  claim 3 ,
 wherein the stringer is integrated with the panel without fasteners.   
     
     
         13 . The composite material structure according to  claim 3 ,
 wherein both ends of each of the portions each having the hat-shaped cross section are occluded.   
     
     
         14 . The manufacturing method of the composite material structure according to  claim 7 ,
 wherein integrating the textile with the laminated body of the prepregs and curing the laminated body of the prepregs on which the textile has been set are performed by forming the vacuum state in the space covered with the bagging film and heating the laminated body of the prepregs on which the textile has been set.