Abstract
This work investigates the relation between shear stress and plastic yield considering that a crystal can only deform in a limited set of directions. The shear stress in arbitrary directions is mapped for some cases showing relevant differences. Yield loci based on mean shear stress are con- structed. The Tresca yield criterion can be improved by averaging the shear stress over directions near the direction of maximum shear stress. Yield criteria based on averaging over crystallographic direction show a clear influence of the actual orientation of this direction, notably in case of few crystallographic directions. The general finding is that the higher the isotropy of a crystal, the lower the plane strain factor. The shape of the yield loci is comparable to those derived by the Hershey criterion with exponents lower than 3.
Original language | English |
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Pages (from-to) | 3-10 |
Journal | Key engineering materials |
Volume | 611-612 |
DOIs | |
Publication status | Published - 2014 |
Keywords
- METIS-303702
- IR-91150