Accession Number : ADA302349

Title :   Stress Analysis and Buckling of J-Stiffened Graphite-Epoxy Panel.

Descriptive Note : Technical paper,

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

Personal Author(s) : Davis, Randall C.

PDF Url : ADA302349

Report Date : FEB 1980

Pagination or Media Count : 23

Abstract : A graphite-epoxy shear panel with bonded-on J-stiffeners has been investigated. This panel was loaded to buckling in a picture frame shear test. Two finite element models, each of which included the doubler material bonded to the panel skin under the stiffeners and at the panel edges, were used to make a stress analysis of the panel. The shear load distributions in the panel from two commonly used boundary conditions, applied shear load and applied displacement, were compared with the results from one of the finite element models that included the picture frame test fixture. Analysis results show that use of the bonded doubler material under the stiffeners and at the panel edges in conjunction with the test fixture loading produces a highly nonuniform shear load dis analytical results were verified by comparison with strain and buckling results from the well-controlled laboratory test of the panel. (MM)

Descriptors :   *STIFFENING, *BONDED JOINTS, *BUCKLING, *GRAPHITE EPOXY COMPOSITES, SHEAR PROPERTIES, LOAD DISTRIBUTION, STRESS ANALYSIS, FINITE ELEMENT ANALYSIS, PANELS, COMPOSITE STRUCTURES, BENDING, FRAMES, EPOXY RESINS.

Subject Categories : Laminates and Composite Materials
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE