Accession Number : AD0774497

Title :   Failure of Unidirectional Composites under Combined Loads.

Descriptive Note : Final rept. Feb-Sep 72,


Personal Author(s) : Zweben,C. H. ; Bagchi,D. K. ; Rosen,B. W.

Report Date : OCT 1972

Pagination or Media Count : 78

Abstract : The mechanisms of failure of unidirectional composites were studied under combined stresses. The effects of fiber and matrix constitutive behavior, statistics of fiber strength, and fiber-matrix interface characteristics on composite strength were studied. The salient features of lamina strength under axial tension/axial shear were determined. Examples are given for boron/epoxy and glass/epoxy. An exploratory axial shear/transverse tension/transverse shear using upper bound limit analysis techniques was performed as a means of estimating the effects of interlaminar stresses on composite failure. (Author, modified-PL)

Descriptors :   *Fiber reinforced composites, Failure, Failure(Mechanics), Loads(Forces), Orientation(Direction), Shear properties, Stresses, Fibers, Fiber reinforcement, Matrix materials, Epoxy resins, Epoxy compounds, Boron, Reinforced plastics, Glass, Polymers, Composite materials

Subject Categories : Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE