A Correlation between Crack Growth Rate and Fracture Mode Transitions in Low-Density Polyethylene.

Abstract

Fatigue crack propagation rates in low-density polyethylene as a function of stress intensity factor were found to exhibit a discontinuity in the range Delta K = 0.4-0.6 MPa Zeta m. Within this range the FCP rate decreased with increasing Delta K. Fractographic examination revealed significant differences in the appearance of the fracture surfaces corresponding to values of Delta K below and above the transition range. While the reason for this behavior is not clear, the nucleation and growth of voids was involved throughout-the voids being smaller at low values of Delta K than at higher values. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jan 30, 1981
Accession Number
ADA096067

Entities

People

  • John A. Mason
  • Philip E. Bretz
  • Richard W. Hertzberg

Organizations

  • Lehigh University

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Biomedical And Dental Materials
  • Chemical Engineering
  • Chemistry
  • Crack Propagation
  • Dielectric Polymers
  • Engineering
  • Engineers
  • Geography
  • Low Density
  • Materials
  • Materials Laboratories
  • Materials Science
  • Military Research
  • Polymers
  • Stress Intensity Factors
  • United States
  • Universities

Readers

  • Analytical Mechanics
  • Materials Science (Mechanical Engineering).
  • Polymer Science and Engineering.