Spline Variational Theory for Composite Bolted Joints.

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.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1997
Accession Number
ADA328258

Entities

People

  • E. Iarve

Organizations

  • University of Dayton

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Bolted Joints
  • Boundaries
  • Composite Materials
  • Continuity
  • Coordinate Systems
  • Crack Tips
  • Equations
  • Governments
  • Laminates
  • Materials
  • Mechanical Properties
  • Stress Analysis
  • Stresses
  • Three Dimensional
  • Universities
  • Variational Equations

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Structural Health Monitoring of Composite Structures.