Accession Number : ADP001244

Title :   Postbuckling Behavior of Graphite-Epoxy Panels Loaded in Compression,

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

Personal Author(s) : Starnes,James H., Jr. ; Rouse,Marshall ; Stein,Manuel ; Knight,Norman F. , Jr

Report Date : APR 1983

Pagination or Media Count : 12

Abstract : This report deals with: To study the postbuckling behavior of unstiffened and stiffened graphite-epoxy panels loaded in compression; To identify the failure modes of compressively-loaded graphite-epoxy panels loaded in compression, and To determine the effects of low-speed impact damage and circular holes on postbuckling strength. Parameters governing the postbuckling behavior of orthotropic plates have been determined; Postbuckling strength is limited by high transverse shear forces and skin-stiffener separation; Postbuckling response can be predicted accurately; Circular holes and low-speed impact damage can reduce postbuckling strength, and Impact damage location can also influence postbuckling strength.

Descriptors :   *Composite materials, *Graphite, *Epoxy resins, *Panels, *Buckling, *Mathematical analysis, Failure(Mechanics), Stiffness, Impact tests, Structural response, Mathematical prediction, Stress strain relations, Differential equations, Conferencing(Communications), Symposia

Distribution Statement : APPROVED FOR PUBLIC RELEASE