Interlaminar Stress Singularities at a Straight Free Edge in Composite Laminates.

Abstract

A quasi-three-dimensional finite element analysis was used to analyze the edge-stress problem in four-ply, composite laminates. The seven laminates that were considered belong to the laminate family THETA/THETA-90)sub s, where 0 < or = theta , or = 90. Systematic convergence studies were made to explore the existence of stress singularities near the free edge. The present analysis appears to confirm the existence of stress singularities at the intersection of the interface and the free edge. The power of the stress singularity was the same for all seven laminates considered. (MM)

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1980
Accession Number
ADA305200

Entities

People

  • I. S. Raju
  • John H. Crews Jr.

Organizations

  • Langley Research Center

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Cartesian Coordinates
  • Composite Materials
  • Convergence
  • Curve Fitting
  • Displacement
  • Equations
  • Finite Element Analysis
  • Laminates
  • Materials
  • Modulus Of Elasticity
  • Numerical Analysis
  • Shear Modulus
  • Shear Stresses
  • Stresses
  • Thickness
  • Three Dimensional

Readers

  • Calculus or Mathematical Analysis
  • Structural Health Monitoring of Composite Structures.