Accession Number : ADA309560

Title :   Structural Efficiency of Aluminum Multiweb Beams and Z-Stiffened Panels Reinforced With Filamentary Boron-Epoxy Composite.

Descriptive Note : Technical note,

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION HAMPTON VA LANGLEY RESEARCH CEN TER

Personal Author(s) : Peterson, James P.

PDF Url : ADA309560

Report Date : JUN 1970

Pagination or Media Count : 28

Abstract : The gain in structural efficiency achieved by reinforcing the aluminum cover skins of multiweb beams and Z-stiffened panels with rectangular boron-epoxy stiffeners located midway between conventional webs or stiffeners is calculated. The effectiveness of adding boron-epoxy reinforcement to the outstanding flange of the Z-stiffeners in Z-stiffened panels is also evaluated. Cover reinforcement reduced the mass of the multiweb beams by about 25 percent and reduced the mass of Z-stiffened panels by about 15 percent. The flange reinforcement reduced the mass of the Z-stiffened panels by another 8 percent at low values of the loading index but had little effect on mass at higher values of the loading index.

Descriptors :   *STRUCTURAL PROPERTIES, *EFFICIENCY, *ALUMINUM, *FILAMENTS, *EPOXY COMPOSITES, *BORON, *REINFORCING MATERIALS, STIFFENING, FLANGES, AIRCRAFT EQUIPMENT, SKIN(STRUCTURAL).

Subject Categories : Inorganic Chemistry
      Aircraft
      Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE