The distribution of dislocations in the vicinity of a mode I crack tip is formulated based on the observation of a single crystal specimen of aluminium by transmission electron microscopy (TEM). Closed form expressions of the dislocation density function and the dislocation-free zone (DFZ) condition
The dislocation field around a mode-II crack tip
โ Scribed by C.R. Chiang
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- English
- Weight
- 437 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0013-7944
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โฆ Synopsis
hvo dimensional distribution of dislocations compatible with slip line theory is used to simulate the plastic flow near the mode II crack tip. On the basis of this model, the critical shear stress 7c is derived from the variational form of the energy principle. In comparison with the critical tensile stress a, obtained by Vilmann and Mura, it is found that rc = 0.33~~.
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