Mixed-Mode Fracture of Graphite/Epoxy Composites.

Abstract

The reported research presents results on the fracture strength of graphite/epoxy (T300/5208) (0/+ or - 45) and (0/+ or - 45/90) symmetric laminates in the presence of angle cracks. The results indicate that the fracture strength can be predicted irrespective of the crack orientation if one uses the effective normal crack length in the equation developed for normal cracks. The fracture strength prediction is made using a two parameter (unnotched fracture strength and inferred dimensions of the damage zone) model, when the laminate is subjected to uniaxial loading along one of the material symmetry axes. The results indicate that the critical damage zone is not constant for the two laminates although it is independent of the crack orientation. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1977
Accession Number
ADA049528

Entities

People

  • Don H. Morris

Organizations

  • Mississippi State University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Composite Materials
  • Crack Tips
  • Cracks
  • Epoxy Composites
  • Epoxy Laminates
  • Graphitic Materials
  • Laminates
  • Materials
  • Notch Sensitivity
  • Orientation (Direction)
  • Stresses
  • Tensile Strength
  • Thickness
  • Universities

Readers

  • Fluid Dynamics.
  • Structural Health Monitoring of Composite Structures.

Technology Areas

  • AI & ML
  • AI & ML - Bayesian Inference