Towards a Predictive Design Methodology of Composite Laminates and Patches: Physical Models of Environmental and Thermal Sensitive Failure Processes

Abstract

Once damage initiates, the stress distribution at the notch tip is altered by the growth of splits and delaminations and ultimate failure is controlled by the maximum notch tip stress in the load-bearing 0 degree plies, sigma(0p). A damage-based model for notched tensile strength has been assembled, using the results of both finite element analysis and Weibull experiments. Thermal residual stresses are included into the model. Additional energy contributions are suggested that may arise due to interlaminar effects not included in the 2-dimensional finite element model.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1998
Accession Number
ADA343003

Entities

People

  • Peter W. Beaumont

Organizations

  • University of Cambridge

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Carbon Fibers
  • Composite Materials
  • Epoxy Laminates
  • Failure Mode And Effect Analysis
  • Finite Element Analysis
  • Glass Fiber Reinforced Plastics
  • Glass Fibers
  • Laminates
  • Material Degradation Processes
  • Materials
  • Materials Laboratories
  • Materials Science
  • Materials Testing
  • Mechanics
  • Micromechanics
  • Reinforced Plastics
  • Two Dimensional

Readers

  • Computational Modeling and Simulation
  • Structural Health Monitoring of Composite Structures.