A Study of Crack Propagation in Alpha-Iron
In previous attempts to simulate crack extension on a (100) plane in α-iron, it was not possible to induce the rupture of atomic bonds at the crack tip. The work reported here overcomes this deficiency by considering the crack front to be jogged. It is then found that an existing crack will heal or extend, depending on whether the stress-intensity factor is less or greater than a critical value. The results are in quantitative agreement with the critical stress-intensity factor determined indirectly in previous work and are consistent with the Griffith criterion for quasibrittle crack growth.
KeywordsCrack Front Crack Closure Linear Elastic Fracture Mechanic Strain Energy Release Crack Line
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- 1.P. C. Gehlen and M. F. Kanninen, Inelastic Behavior of Solids, M. F. Kanninen, W. A. Adler, A. R. Rosenfield, and R. I. Jaffee, eds., McGraw-Hill, New York, p. 587 (1970).Google Scholar
- 2.P. C. Gehlen, this volume.Google Scholar
- 3.J. P. Hirth, Inelastic Behavior of Solids, M. F. Kanninen, W. A. Adler, A. R. Rosenfield, and R. I. Jaffee (editors), McGraw-Hill, New York, p. 605 (1970).Google Scholar
- 6.G. C. Sih and H. Liebowitz, Fracture, Vol. II, H. Liebowitz, editor, Academic Press Inc., New York (1968).Google Scholar
- 8.R. Chang, Int. J. Fracture Mech., 6, 111 (1970).Google Scholar
- 9.W. R. Tyson and L.C.R. Alfred, presentation at the Corrosion Fatigue Conference, the University of Connecticut, June 14–18, 1971.Google Scholar
- 12.J. N. Goodier and M. F. Kanninen, Technical Report No. 165, Division of Engineering Mechanics, Stanford University (1966).Google Scholar