✦ LIBER ✦

Crack tip shielding/antishielding by impurity atoms

✍ Scribed by J. Weertman; J. E. Hack

Book ID: 104616389
Publisher: Springer Netherlands
Year: 1988
Tongue: English
Weight: 395 KB
Volume: 36
Category: Article
ISSN: 1573-2673
DOI: 10.1007/bf00034815

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✦ Synopsis

The impurity crack tip shielding/antishielding stress intensity factor is found for equilibrium impurity concentrations near the crack tip for a crack tip with or without a plastic zone. It is found that the impurity atoms produce either no shielding/antishielding stress intensity factor or only a very small shielding/antishielding stress intensity factor. However, if the impurity concentration near a crack tip is perturbed from equilibrium values the possibility arises that appreciable crack tip shielding/antishielding can exist. If a small elastic enclave exists between the crack tip and the plastic zone, impurity atoms also may be able to produce an appreciable crack tip shielding/antishielding.

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