Notch-Tip Damage and Translaminar Fracture Toughness Measurements from Carbon/Epoxy Laminates

Abstract

Notched (0/+45/90/-45) carbon/epoxy laminates were used to study translaminar fracture, where through-thickness cracking propagates across fibers and laminae. Radiographs of damage were compared with crack growth determined from load-versus-deflection plots using elastic fracture mechanics. Comparison of damage at the notch tip with fracture mechanics evaluation identified some material/test conditions for which a critical value of fracture toughness is a useful concept. For other condition the extent of damage in the specimen showed that the concept of fracture toughness is not directly applicable. Carbon/Epoxy, Laminates, Composite materials, Notch damage, Radiography, Fracture mechanics, Fracture toughness.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1994
Accession Number
ADA280101

Entities

People

  • John H. Underwood
  • M. T. Kortschot

Organizations

  • United States Army Armament Research, Development and Engineering Center

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Composite Materials
  • Epoxy Laminates
  • Failure Mode And Effect Analysis
  • Fracture (Mechanics)
  • Laminates
  • Materials
  • Materials Laboratories
  • Materials Testing
  • Measurement
  • Mechanics
  • Military Research
  • Modulus Of Elasticity
  • Security
  • Test Methods
  • Thickness
  • Toughness
  • X Rays

Readers

  • Materials Science (Mechanical Engineering).
  • Structural Health Monitoring of Composite Structures.