Effect of Frequency on Fatigue Crack Propagation in Short-Glass-Fiber-Reinforced Nylon 66.

Abstract

The fatigue crack propagation (FCP) response of nylon 66 and composites containing 16 and 31 vol. % short glass fibers was determined at frequencies of 1, 10, 50, and 100 Hz. The sensitivity to frequency was found to depend on glass content and, in the case of the pure matrix, on the value of the stress intensity factor range, delta K. Whereas both glass-reinforced compositions were superior to the pure matrix material, an inversion in relative ranking of the former occurred as the cyclic frequency was changed. Also, the strong frequency sensitivity revealed by nylon 66 at low delta K values disagrees with results reported previously. To explain these phenomena a concept based on the competition between localized and more generalized heating is proposed. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1982
Accession Number
ADA124157

Entities

People

  • John A. Manson
  • Reinhold W. Lang
  • Richard W. Hertzberg

Organizations

  • Lehigh University

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Alkenes
  • Bulk Materials
  • Chemical Engineering
  • Chemistry
  • Composite Materials
  • Engineering
  • Fiber Reinforced Polymers
  • Glass Fibers
  • Heat Transfer
  • Materials
  • Materials Laboratories
  • Materials Science
  • Materials Testing
  • Mechanics
  • Military Research
  • Reinforced Plastics
  • United States

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Polymer Science and Engineering.
  • Space/Atmospheric Physics.