Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
799467 | Journal of the Mechanics and Physics of Solids | 2013 | 19 Pages |
Abstract
The Peach–Koehler expression for the stress generated by a single (non-planar) curvilinear dislocation is evaluated to calculate the dislocation self stress. This is combined with a law of motion to give the self-induced motion of a general dislocation curve. A stability analysis of a rectilinear, uniformly translating dislocation is then performed. The dislocation is found to be susceptible to a helical instability, with the maximum growth rate occurring when the dislocation is almost, but not exactly, pure screw. The non-linear evolution of the instability is determined numerically, and implications for slip band formation and non-Schmid behavior in yielding are discussed.
Keywords
Related Topics
Physical Sciences and Engineering
Engineering
Mechanical Engineering
Authors
Yichao Zhu, Stephen Jonathan Chapman, Amit Acharya,