Interlaminar Stresses in Composite Laminates -- A Perturbation Analysis,

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)

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1976
Accession Number
ADA302001

Entities

People

  • Carl T. Herakovich
  • Peter W. Hsu

Organizations

  • Virginia Tech

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Boundary Layer
  • Boundary Value Problems
  • Composite Materials
  • Computational Fluid Dynamics
  • Computational Science
  • Constitutive Equations
  • Differential Equations
  • Elastic Properties
  • Epoxy Laminates
  • Equations
  • Failure Mode And Effect Analysis
  • Fluid Mechanics
  • Laminates
  • Materials
  • Mechanics
  • Partial Differential Equations
  • Shear Stresses

Fields of Study

  • Physics

Readers

  • Calculus or Mathematical Analysis
  • Materials Science (Mechanical Engineering).
  • Reinforced Composite Materials