|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Deformation and Transitions at Interfaces
||Polycrystalline Plasticity Simulations with Anisotropic Discrete Dislocation Dynamics
||John T Graham, Anthony D Rollett, Richard LeSar
|On-Site Speaker (Planned)
||John T Graham
Polycrystalline materials make up the majority of the materials used in the world, and the ability to determine their mechanical properties is of great interest. Much work has been done in developing methods to determine these properties through computer simulation methods. We present a polycrystalline plasticity simulation approach based on a fast Fourier transform dislocation dynamics (FFTDD) method. In FFTDD, the dislocations are represented as a discontinuity in the plastic distortion tensor, which is a direct measure of the slip in the lattice caused by the dislocations. The stresses arising from the system of dislocations are determined within an FFT formalism. From this, the stresses on each dislocation are calculated and the dislocations are evolved within the polycrystalline system. We will review the method and discuss applications.