Accession Number : ADA302001

Title :   Interlaminar Stresses in Composite Laminates -- A Perturbation Analysis,

Corporate Author : VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG COLL OF ENGINEERING

Personal Author(s) : Hsu, Peter W. ; Herakovich, Carl T.

PDF Url : ADA302001

Report Date : JAN 1976

Pagination or Media Count : 105

Abstract : Interlaminar stresses play an important role in the load transfer mechanism in composite laminates. Both numerical and experimental results have demonstrated that when a thin laminate is subjected to a uniaxial extension, there exist highly localized stress concentration regions near the free edges, the so-called boundary layer regions. This phenomenon has been suggested to be the dominant factor initiating failure of some composite laminates. The present thesis will analyze the boundary layer by "perturbing" the exact elasticity equations with a stretching transformation. Solutions to these transformed equations provide a higher order analysis than idealized lamination theory. Hence better insight into the interlaminar stress behavior is obtained using the perturbation analysis. (MM)

Descriptors :   *LAMINATES, THICKNESS, STRESS ANALYSIS, LITERATURE SURVEYS, DISPLACEMENT, ELASTIC PROPERTIES, THESES, SHEAR STRESSES, PERTURBATIONS, BOUNDARY LAYER FLOW, GRAPHITE EPOXY COMPOSITES.

Subject Categories : Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE