Accession Number : ADA302708

Title :   Buckling and Failure Characteristics of Graphite-Polyimide Shear Panels.

Descriptive Note : Technical paper,

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

Personal Author(s) : Shuart, Mark J. ; Hagaman, Jane A.

PDF Url : ADA302708

Report Date : MAY 1983

Pagination or Media Count : 25

Abstract : The buckling and failure characteristics of unstiffened, blade-stiffened, and hat-stiffened graphite-polyimide shear panels are described. The picture frame shear test is used to obtain shear stress-strain data at room temperature and at 316 deg c. The experimental results are compared with a linear buckling analysis, and the specimen failure modes are described. The effect of the 316 deg C test temperature on panel behavior is discussed. Significant postbuckling shear strength was observed for the unstiffened specimens. For all specimens, failure was caused by either a fixture-induced instability or by the stiffeners debonding from the skin. (MM)

Descriptors :   *STIFFENING, *BUCKLING, *SPACE SHUTTLES, *GRAPHITE EPOXY COMPOSITES, STRESS STRAIN RELATIONS, PANELS, FAILURE, GRAPHITE, STRENGTH(MECHANICS), SHEAR STRESSES, FRAMES, FAILURE(MECHANICS), FLEXIBLE STRUCTURES, SHEAR STRENGTH, POLYIMIDE PLASTICS, SHEAR TESTS.

Subject Categories : Laminates and Composite Materials
      Plastics
      Manned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE