|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Multiscale Architectured Materials (MAM II): Tailoring Mechanical Incompatibility for Superior Properties
||Multi-scale Modelling of Mechanical Behavior and Deformation in Materials with Gradient Microstructures
||Hao Lyu, Mehdi Hamid, Annie Ruimi, Hussein M Zbib
|On-Site Speaker (Planned)
Materials with gradient microstructures have attracted considerable attention due to their improved ductility and strength. In this work, we focus on modeling the deformation mechanisms of gradient material using a dislocation-based multi-scale model coupled with a stress/strain gradient theory. The multi-scale framework is consists of a viscoplastic self-consistent model coupled by continuum dislocation dynamic. Nano-gradient materials with a "bamboo structure" are studied. The mechanical responses of these gradient structures are compared with their equivalent homogeneous microstructure cases and experiments. The simulation results show that gradient materials can achieve high strength and ductility simultaneously, and are in good agreement with experimental results found in the literature.