Crack Propagation Modes in Injection Molded Fiber Reinforced Thermoplastics,

Abstract

The modes of crack propagation are reported for injection molded short glass and carbon fiber reinforced thermoplastics. The matrices ranged from ductile to brittle, including Nylon 66, polycarbonate, polysulfone, poly(amide-imide), and polyphenylene sulfide; fiber contents were 30 or 40 % by weight. The main crack is found to grow in a fiber avoidance mode, bypassing regions of agglomeration of locally aligned fibers. The local mode of crack tip advance varied with matrix ductility and bond strength. The fracture toughness and fatigue resistance of each material are related to the mode of crack growth.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1980
Accession Number
ADA301553

Entities

People

  • D. D. Huang
  • F. J. Mcgarry
  • J. F. Mandell

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Carbon Fibers
  • Composite Materials
  • Crack Propagation
  • Crack Tips
  • Engineering
  • Glass Fibers
  • Graphitic Materials
  • Materials Laboratories
  • Materials Testing
  • Mechanics
  • Microscopes
  • Plastics
  • Reinforced Plastics
  • Stresses
  • Tensile Strength
  • Test Methods
  • Thermoplastic Resins

Fields of Study

  • Materials science

Readers

  • Optical Fiber Sensing and Electromagnetic Propagation.
  • Polymer Science and Engineering.
  • Structural Health Monitoring of Composite Structures.