| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Integration between Modeling and Experiments for Crystalline Metals: From Atomistic to Macroscopic Scales IV
|
| Presentation Title |
Continuum Dislocation Dynamics-based Full Field Crystal Plasticity Modeling for Characterizing Dislocation Distribution and Boundary Transmission in Polycrystalline Materials |
| Author(s) |
Navid Kermanshahimonfared, Georges Y. Ayoub, Ioannis Mastorakos |
| On-Site Speaker (Planned) |
Georges Y. Ayoub |
| Abstract Scope |
In this work, a continuum dislocation dynamics (CDD)-based crystal plasticity simulations were achieved using a fast Fourier transform-based elasto-viscoplastic (EVP-FFT) micromechanical solver to analyze the deformation mechanisms of three different polycrystalline metals. The stress/strain gradient theory (CDD) combined with the crystal plasticity allows accounting for the grain size effects, dislocation density flux among neighboring grains and grain boundary back stress field. The simulations were performed on 3D microstructures of α-Iron and aluminum obtained using electron backscatter diffraction-based orientation image microscopy. A robust parameter identification method is proposed, to fit the macroscopic mechanical behavior and texture evolution. Finally, the mechanisms of deformation are studies at different location of the polycrystalline materials and for different loading conditions. |