Accession Number : ADA303102

Title :   Boundary-Layer Effects in Composite Laminates: Free-Edge Stress Singularities. Part 6.

Descriptive Note : Final rept.,

Corporate Author : ILLINOIS UNIV AT URBANA DEPT OF THEORETICAL AND APPLIED MECHANICS

Personal Author(s) : Wang, S. S. ; Choi, I.

PDF Url : ADA303102

Report Date : APR 1981

Pagination or Media Count : 49

Abstract : A rigorous mathematical model has been obtained for the boundary-layer free-edge stress singularity in angleplied and crossplied fiber composite laminates. The solution was obtained using the previously developed method (under the grant) consisting of complex-variable stress function potentials and unique eigenfunction expansions. The required order of the boundary-layer stress singularity is determined by solving the transcendental characteristic equation obtained from the homogeneous solution of the partial differential equations. Numerical results obtained show that the boundary-layer stress singularity depends only upon material elastic constants and fiber orientation of the adjacent plies. For angleplied and crossplied laminates the order of the singularity is weak in general. (MM)

Descriptors :   *LAMINATES, *FIBER REINFORCED COMPOSITES, MATHEMATICAL MODELS, STRESS ANALYSIS, COMPOSITE MATERIALS, EDGES, DISPLACEMENT, ELASTIC PROPERTIES, ORIENTATION(DIRECTION), BOUNDARY LAYER, EIGENVALUES, GRAPHITE, PARTIAL DIFFERENTIAL EQUATIONS, GRAPHITE EPOXY COMPOSITES.

Subject Categories : Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE