A comparison of the smeared-dislocation and super-dislocation description of a hydrided region in the context of modelling delayed hydride cracking initiation
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In quantifying the stress distribution within a hydrided region in the context of modelling delayed hydride cracking (DHC) initiation in zirconium alloys, this paper highlights the desirability to account for image effects, i.e. the interaction between the hydrided region and any free surface, for example a sharp crack, blunt notch or planar surface. The super-dislocation representation of a finite thickness hydrided region is ideal for accounting for image effects, and adequately accounts for the finite thickness, t, of a hydrided region provided, as is the case in practice, we are concerned with the stress value within the hydride at distances ≳ 0.25t from an end of the region.
KeywordsPolymer Zirconium Free Surface Hydrided Stress Distribution
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- 5.J. Weertman and J. R. Weertman, “Elementary Dislocation Theory”, Macmillan Series in Materials Science (Macmillan, New York, 1967).Google Scholar
- 7.J. R. Rice and M. A. Johnson, in “Inelastic Behaviour of Solids”, Edited by M. F. Kanninen, R. I. Jaffee and A. R. Rosenfield (McGraw-Hill, New York, 1970) p. 641.Google Scholar
- 8.H. Tada, P. C. Paris and G. R. Irwin, “The Stress Analysis of Cracks Handbook” (Del Research Corporation, Hellertown, PA, 1973).Google Scholar