Rib of composite material and method of forming the same
AssigneeFuji Jukogyo Kabushiki Kaisha
InventorsKazuaki Amaoka, Yasuo Isano
Life of this patent
Estimating the term…
Abstract
A rib of a composite material for a box structure such as an airfoil has, in an integral structure, a web and flanges formed so as to extend along opposite longitudinal side edges of the web. The web is provided with a plurality of parallel first ridges or beads formed so as to extend across the web and to protrude outward from the outer surface of the web, and each of the flanges is provided with a plurality of parallel second ridges formed so as to extend across the flange, to protrude inward from the outer surface thereof and to merge into the corresponding first ridges. The structure eliminates causes of wrinkles and provides an increased strength.
Claims19
A channel-shaped rib of a composite material having, in an integral structure, a web extending in a lengthwise direction of the rib, and flanges formed on, and extending along, opposite lengthwise edges of the web to provide a channel shape;
- said rib comprising:
- a plurality of spaced apart first beads extending across the web, each of said first beads having an outer surface protruding outward from an outer surface of said web on a remote side from an interior space of said channel shape;
- a plurality of spaced apart second beads extending across each of said flanges, said second beads protruding inward from an inner surface of each flange on the same side as said interior space of the channel shape, each of said second beads having an inner surface protruding into said interior space and having an outer surface defining a recess formed in the outer surface of each of the flanges;
- and
- said second beads being positioned so as to merge with respective first beads.
A channel-shaped rib of a composite material having, in an integral structure, a web extending in a lengthwise direction of the rib, and flanges formed on, and extending along, opposite lengthwise edges of the web to provide a channel shaped rib with an interior channel space;
- said rib comprising:
- a first set of spaced apart beads extending across the web;
- a second set of spaced apart beads extending across each of said flanges;
- said sets of beads being arranged so that one of said first and second sets of beads protrudes inwardly into the interior channel space defined by the channel shaped rib while a remaining one of said first and second sets of beads extends in a direction away from the interior space and out away from an outer surface of said channel shaped rib of composite material;
- and
- wherein beads of said first set of beads merge with respective beads of said second set of beads.
Dependencies are inferred from the claim text.