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Crack Morphology in Relatively Brittle Crystals

  • Robb Thomson
  • Edwin Fuller
Part of the Fracture Mechanics of Ceramics book series (FMOC, volume 1)

Abstract

From the viewpoint that cracks are atomically sharp, general outlines are given for some of the types of theories which should be developed for such cracks. The existence of atomic cleavage in a large class of materials is argued on the basis of the stability of a crack under spontaneous dislocation formation. A qualitative description of lattice trapping of a cleavage crack is given which correlates the effect to the atomic force laws. The determining factor for the observation of lattice trapping is the width of the cohesive region of the crack “core.” Finally, a qualitative model of slow crack growth due to environmental effects is developed in terms of atomic dissolution at the crack tip.

Keywords

Stress Intensity Factor Slow Crack Growth Cleavage Crack Thermodynamic Equilibrium State Kink Site 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    For general discussion, see Strong Solids, A. Kelly, Oxford, London, 1966. See also N. MacMillan, J. Matls Science 7,239 (1972)? A. Kelly, W. Tyson, and A. Cottrell, Phil. Mag. 15, 567 (1967).Google Scholar
  2. 2.
    J. Rice, R. Thomson, to be published.Google Scholar
  3. 3.
    Theory of Dislocations, J. Hirth, J. Lothe, McGraw Hill, New York, 1968.Google Scholar
  4. 4.
    R. Thomson, C. Hsieh, V. Rana, J. Appl. Phys. 42, 3154 (1971).CrossRefGoogle Scholar
  5. 5.
    C. Hsieh, R. Thomson, J. Appl. Phys. 44, 2051 (1973).CrossRefGoogle Scholar
  6. 6.
    P. C. Gehlen. Kanninen, Inelastic Behavior of Solids, Ed. M. F. Kanninen, W. Adler, A. Rosenfeld, and R. Jaffee ( McGraw Hill, New York, 1970 ).Google Scholar
  7. 7.
    J. E. Sinclair, B. R. Lawn, Proc. Roy. Soc. A329, 83 (1972).CrossRefGoogle Scholar
  8. 8.
    S. Wiederhorn, H. Johnson, A. Diness, A. Heuer, to be published.Google Scholar
  9. 9.
    S. Wiederhorn, B. Hockey, D. Roberts, to be published, Phil. Mag.Google Scholar
  10. 10.
    J. N. Goodier, Fracture, Ed. H. Liebowitz, Academic Press, New York, 1968.Google Scholar
  11. 11.
    E. Orowan, Rep. Prog. Phys., 12, 185 (1949).CrossRefGoogle Scholar
  12. 12.
    J. Sinclair, J. Phys. Solid State (in press).Google Scholar
  13. 13.
    S. Wiederhorn, Int. J. Fract. Mech. 171 (1968).Google Scholar
  14. 14.
    R. Charles, W. Hillig, Symp. Mech. Strength of Glass and Ways of Improving It. Proceedings published by Union Scientifique Continentale du Verne, Charlessi Belg. 1962.Google Scholar
  15. 15.
    R. Stevens and R. Dutton, Matls. Sc. Eng. 8, 220 (1971).CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1974

Authors and Affiliations

  • Robb Thomson
    • 1
  • Edwin Fuller
    • 1
  1. 1.National Bureau of StandardsUSA

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