Accession Number : AD0764362

Title :   The Behavior of Advanced Filamentary Composite Plates with Cutouts.

Descriptive Note : Final technical rept. Mar 70-Sep 72,

Corporate Author : GRUMMAN AEROSPACE CORP BETHPAGE N Y

Personal Author(s) : Whiteside,James B. ; Daniel,Isaac M. ; Rowlands,Robert E.

Report Date : JUN 1973

Pagination or Media Count : 170

Abstract : The results of an analytical and experimental program to investigate the behavior of advanced composite plates with cutouts are presented. Classi-cal and numerical analyses of anisotropic plates are compared with data from composite panels instrumented with strain gages, photoelastic coatings, and moire fringe multiplication techniques. A finite element analysis program is used to examine elastic and plastic interlaminar shear at free edges in composite laminates. The behavior of fiberglass-epoxy, graphite-epoxy, and boron- epoxy laminates with holes is examined for uniaxial and biaxial tension. The compressive behavior of graphite-epoxy and boron-epoxy laminates with holes is discussed. Test and analysis results for boron-epoxy laminates demonstrate the influence of such variables as fiber orientation, stacking sequence, load history, hole roughness, hole shape, diameter/width ratio, diameter/thickness ratio, loading rate, and hole reinforcement. Data and recommendations for design are discussed. (Author-PL)

Descriptors :   (*LAMINATES, *COMPOSITE MATERIALS), PANELS, ORIFICES, STRESSES, FRACTURE(MECHANICS), GLASS TEXTILES, EPOXY RESINS, GRAPHITE, BORON, FILAMENTS, MECHANICAL PROPERTIES, AIRFRAMES

Subject Categories : Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE