The Effect of Microcrazing on Fatigue Crack Propagation in Polymers

  • A. Chudnovsky
  • A. Moet
  • I. Palley
  • E. Baer
Part of the Polymer Science and Technology book series


A generalized theory of fatigue crack propagation in polymers is outlined. The theory accounts for fatigue crack propagation through root craze extension accompanied by simultaneous dissemination of microcrazing around the crack-root craze system thereby describing a crack-craze zone (CCZ). In addition to the conventional crack length, the width of CCZ is introduced as a new internal parameter. Applying a special version of the second law of thermodynamics: the principle of minimum thermodynamic forces, these internal parameters are formally described in terms of the reciprocal thermodynamic forces. The rate of crack extension per cycle was found to depend strongly on changes in the width of CCZ. Results of the model are applied to fatigue crack propagation data in polystyrene under various loading conditions and a good description of growth rates is observed.


Stress Intensity Factor Crack Growth Rate Fatigue Crack Growth Energy Release Rate Fatigue Crack Propagation 
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  1. 1.
    R.W. Herzberg and J.A. Manson, “Fatigue of Engineering Plastics”, Academic Press, New York (1980).Google Scholar
  2. 2.
    D. Post, Proc. Soc. Exp. Stress Anal., 12, 99 (1954).Google Scholar
  3. 3.
    M. Bevis and D. Hull, J. Mater. Sci., 5, 983 (1970).ADSCrossRefGoogle Scholar
  4. 4.
    R.G. Hoagland, G.H. Han and A.R. Rosenfield, Rock Mechanics, 5, 77 (1974).CrossRefGoogle Scholar
  5. 5.
    J. Botsis, A. Moet, A. Chudnovsky, unpublished.Google Scholar
  6. 6.
    Chapter 4 of ref. 1.Google Scholar
  7. 7.
    P. Glansdorff and I. Prigogine, “Thermodynamic Theory of Structure Stability and Fluctuations”, Wiley-Interscience, New York (1971).MATHGoogle Scholar
  8. 8.
    D.S. Dugdale, J. Mech. Phys. Solids, 8, 100 (1980).ADSCrossRefGoogle Scholar
  9. 9.
    J.R. Rice, H. Liebowitz, in (Ed.), “Fracture”, Vol. II, Academic Press, New York (1968).Google Scholar
  10. 10.
    V. Khanodgen and A. Chudnovsky, “Thermodynamic Analysis of Quasistatic Crack Growth in Creep”, in L. Kurshin (Ed.) “Dynamics and Strength in Aircraft Construction”, (Russian) Novosibrisk (1978).Google Scholar
  11. 11.
    P.C. Paris, Paper No. 62-Met-3, ASME, New York (1962).Google Scholar
  12. 12.
    Y.W. Mai and J.G. Williams, J. Mater. Sci., 14, 1933 (1979).ADSCrossRefGoogle Scholar
  13. 13.
    G.P. Marshall, L.E. Culver and J.G. Williams, Int. J. Fract., 9, 295 (1973).CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1983

Authors and Affiliations

  • A. Chudnovsky
    • 1
  • A. Moet
    • 1
  • I. Palley
    • 1
  • E. Baer
    • 1
  1. 1.Department of Macromolecular Science, Case Institute of TechnologyCase Western Reserve UniversityClevelandUSA

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