Filament reinforced structural shapes
Composite structural joint and method of fabrication thereof
Door panel and manner of making same
Apparatus for making a surface type structural component, especially for aircraft
Surface type structural component, especially for aircraft
Composite cruciform structure for joining intersecting structural members of an airframe and the like Patent #: 4715560
ApplicationNo. 07/043082 filed on 04/27/1987
US Classes:52/630, IMPERFORATE PANEL WITH INTEGRAL REINFORCING244/123.3, Integral frame and skin428/119Including sheet or component perpendicular to plane of web or sheet
ExaminersPrimary: Ridgill, James L. Jr.
Attorney, Agent or Firm
International ClassesB29D 31/00 (20060101)
B64C 1/06 (20060101)
B64C 1/00 (20060101)
Foreign Application Priority Data1986-04-30 DE
AbstractA fiber reinforced shell structure of synthetic material has an outer skin supported on a skeleton of longitudinal stringers interconnected by ribs. The stringers have a channel cross-section filled with a hard foam. The ribs have an approximately [ or I-shaped cross-section. The ribs are formed by an outer chord and by an inner chord interconnected by a web. If the structure is cylindrical, for example, the ribs extend circumferentially. The rib webs are made of rib web segments which are displaced relative to each other, for example in the circumferential direction in case of a cylindrical structure. The displacement of the web elements corresponds to the on-center spacing between neighboring longitudinal stringers, whereby the fiber reinforced material of the end portions of the rib web segments merge into rib reinforcing or bracing members, where the ribs intersect the stringers. The rib bracing members alternate in opposite directions along a rib and are filled with a hard foam. Such a shell structure can be manufactured with the aid of mold members made substantially of rubber elastic material which greatly facilitates the removal of the mold members from a finished structure, such as an aircraft body.