Accession Number : ADA328258

Title :   Spline Variational Theory for Composite Bolted Joints.

Descriptive Note : Interim rept. 24 Jan-14 Sep 96,

Corporate Author : DAYTON UNIV OH RESEARCH INST

Personal Author(s) : Iarve, E.

PDF Url : ADA328258

Report Date : JAN 1997

Pagination or Media Count : 29

Abstract : Methods for stress redistribution analysis in composite laminates due to matrix cracking were developed. Two approaches were implemented. A conventional mesh overlay method in the crack region to satisfy the crack face boundary conditions and a novel spline basis partitioning method were compared. The conventional approach failed to provide converged stress continuity boundary conditions at the edge of the overlay mesh. The spline basis partitioning method showed accurate stress boundary conditions at the overlay boundaries and the crack faces. Stress redistribution analysis in 90, 0, and 0/90 sub S laminates with matrix cracks emanating from the hole edge has been performed.

Descriptors :   *GRAPHITE EPOXY COMPOSITES, MECHANICAL PROPERTIES, STRESS ANALYSIS, FINITE ELEMENT ANALYSIS, CRACKING(FRACTURING), MESH, EPOXY LAMINATES, OVERLAYS, SPLINES, BOLTED JOINTS.

Subject Categories : Laminates and Composite Materials
      Mechanics
      Numerical Mathematics

Distribution Statement : APPROVED FOR PUBLIC RELEASE