Abstract
In previous work, computer simulation of dislocation emission and motion was carried out considering the stress singularity near the crack tip. It was found that there is a region in which no dislocation exists along the slip plane near the stressed source, namely, a dislocation free zone (DFZ), and that there is an inverse pileup of dislocations against the tip of this DFZ. A formula was obtained correlating the maximum dislocation density with the DFZ length. Based on those results, an evaluation has now been attempted for fracture toughness within the brittle-ductile transition range of steel. The effect of dynamic loading on the fracture toughness and trigger point observed in the experimental results reported in the literature is explained.
Original language | English |
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Pages (from-to) | 464-477 |
Number of pages | 14 |
Journal | ASTM Special Technical Publication |
Issue number | 1207 |
Publication status | Published - 1995 Dec 1 |
Event | Proceedings of the 24th National Symposium on Fracture Mechanics - Gatlinburg, TX, USA Duration: 1992 Jun 30 → 1992 Jul 2 |
ASJC Scopus subject areas
- Engineering(all)