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The Influence of Elastic Anisotropy on Extended Dislocation Nodes
Author(s) -
Pettersson B.
Publication year - 1972
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220540125
Subject(s) - anisotropy , isotropy , elasticity (physics) , dislocation , condensed matter physics , materials science , shear modulus , shear (geology) , physics , composite material , optics
The interaction forces between the partial dislocations comprising an extended dislocation node are calculated using elasticity theory for anisotropic media. The calculations are carried out for nodes of screw, edge, and mixed character in Ag which has an anisotropy ratio A equal to three, and in a hypothetical material with A = 1 and with the same shear modulus as Ag. The results are compared with those of three previous theories using isotropic elasticity theory and developed by Brown and Thölén, Siems, and Jøssang et al. As expected, the effect of anisotropy in Ag is of the same order of magnitude as the uncertainty due to the dislocation core energy.