Wing panel and aircraft main wing

Abstract

There is provided a wing panel having improved formability at the time when the wing panel is curvedly formed by the peen forming method, and an aircraft main wing provided with the said wing panel. For a stringer member 20, a base part 21 is formed, and the neutral axis position N in the cross-sectional direction is located on the wing panel 11 side from the center position C in the height direction of a web part 22. When the peen forming method is carried out by projecting metal shots to a portion near a flange part 23 in the tip end portion of the stringer member 20, the tensile strain developing in the portion near a flange part 23 acts in a state in which the moment length around the neutral axis position N is kept long

1 . A wing panel comprising:
 a wing panel body forming the outer surface of a wing; and   a rib which is formed integrally on the inner surface facing the inside of the wing and is continuous in the spanwise direction of the wing, wherein   the rib is formed so that a width-expanded part, in which the thickness in the base end portion on the wing panel body side is increased, is formed, and the neutral axis position of the rib in the cross section perpendicular to the spanwise direction of the wing is located on the wing panel body side from the center in the height direction from the wing panel body of the rib.   
     
     
         2 . The wing panel according to  claim 1 , wherein the wing panel body is curvedly formed by peen-forming the tip end portion of the rib. 
     
     
         3 . The wing panel according to  claim 1  or  2 , wherein the width-expanded part is of a plate shape formed along the surface of the wing panel body. 
     
     
         4 . The wing panel according to  claim 3 , wherein the thickness of the width-expanded part in the rib rising direction is larger than the thickness of the rib on the tip end portion side. 
     
     
         5 . The wing panel according to  claim 1  or  2 , wherein the rib is formed so that the thickness thereof increases gradually from the tip end portion to the base end portion of the rib. 
     
     
         6 . The wing panel according to  claim 1 , wherein the rib is formed by being machined out of a metallic base material that constitutes the wing panel body. 
     
     
         7 . An aircraft main wing wherein the outer surface of the wing is formed by the wing panel described in  claim 1 .