SaM Seminar Series: Albert To

Professor of Mechanical Engineering and Materials Science

Dr. To received his BS and PhD at the University of California at Berkeley and MS at Massachusetts Institute of Technology, all in Civil and Environ mental Engineering, and another MS in Earth and Planetary Science at U.C. Berkeley. Prior to joining Pitt, he was a postdoctoral research fellow in the Department of Mechanical Engineering at Northwestern University.

Issues and Challenges in the Development of a Multiscale Microstructure Evolution Simulator

Friday, February 27, 2:30 – 3:30 PM
1175 Benedum Hall

 

The SaM talk will present my vision of a revolutionary large-scale microstructure evolution simulator for coupled mechanical deformation and heat transfer applications, especially under extreme conditions. The microstructural features include vacancies, interstitials, dislocations, grains, and cracks at different scales. Their joint interaction leads to the eventual failure of stressed materials. While molecular dynamics (MD) simulation is still computationally too expensive for realistic materials design, continuum mechanics model is inadequate to capture the highly nonlinear behavior in the immediate neighborhood of these defects. Therefore, a number of multiscale methods have recently been developed to couple atomistic and continuum simulations concurrently to extend the spatial and temporal scales of the simulation, but challenging issues still remain in developing a simulator using a concurrent coupled atomistic-continuum scheme. The requirements, challenges, issues, and a few solutions in the development of the multiscale simulator will be presented and discussed.