کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
796792 | 1467128 | 2010 | 24 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Continuity in the plastic strain rate and its influence on texture evolution Continuity in the plastic strain rate and its influence on texture evolution](/preview/png/796792.png)
Classical plasticity models evolve state variables in a spatially independent manner through (local) ordinary differential equations, such as in the update of the rotation field in crystal plasticity. A continuity condition is derived for the lattice rotation field from a conservation law for Burgers vector content—a consequence of an averaged field theory of dislocation mechanics. This results in a nonlocal evolution equation for the lattice rotation field. The continuity condition provides a theoretical basis for assumptions of co-rotation models of crystal plasticity. The simulation of lattice rotations and texture evolution provides evidence for the importance of continuity in modeling of classical plasticity. The possibility of predicting continuous fields of lattice rotations with sharp gradients representing non-singular dislocation distributions within rigid viscoplasticity is discussed and computationally demonstrated.
Journal: Journal of the Mechanics and Physics of Solids - Volume 58, Issue 2, February 2010, Pages 105–128