MEchanics GAthering –MEGA- Seminar: Simulating Plasticity in Metals at Mesoscopic Length and Time Scales
Event details
| Date | 27.04.2023 |
| Hour | 16:15 › 17:30 |
| Speaker | Prof. Douglas E. Spearot (Mehcanical and Aerospace Engineering, University of Florida) |
| Location | Online |
| Category | Conferences - Seminars |
| Event Language | English |
Abstract:
The development of accurate models and simulations of plastic deformation in metallic materials requires an understanding of the behavior of defects and deformation modes in metals at multiple length and time scales. The discrete dislocation dynamics (DDD) method is one promising tool for understanding the plastic response of metallic materials at length and time scales larger than what is possible with brute-force atomistic simulations. Yet, the DDD method must be advanced to consider interactions between dislocations and grain boundaries, for example, and to improve opportunities for connection to experiments. In this presentation, DDD simulations of dislocation transmission at grain boundaries (GBs) in Al will be presented, including a new model for the mechanical structure of equilibrium and non-equilibrium GBs via a disclination-dislocation framework. In addition, new virtual diffraction methods for DDD simulations will be presented, which are designed to enhance the connection between mesoscale simulations and experiments for validation.
Biography:
Dr. Spearot is the Newton C. Ebaugh Professor in the Department of Mechanical & Aerospace Engineering at the University of Florida. He also holds an affiliate appointment in the Department of Materials Science & Engineering. His research focuses on mechanical and thermodynamic properties of materials, with strong emphasis on the structure and behavior of dislocations and grain boundaries in metallic materials. His research group uses and advances atomistic and mesoscale simulation techniques with the intent to extract experimentally relevant properties or metrics from simulation generated data. Dr. Spearot was awarded the CAREER Award in 2010 from the National Science Foundation. He received the Teacher of the Year award in 2020 from the Department of Mechanical & Aerospace Engineering at the University of Florida. Dr. Spearot received his B.S. in Mechanical Engineering from the University of Michigan, and his M.S. and Ph.D. in Mechanical Engineering from the Georgia Institute of Technology.
The development of accurate models and simulations of plastic deformation in metallic materials requires an understanding of the behavior of defects and deformation modes in metals at multiple length and time scales. The discrete dislocation dynamics (DDD) method is one promising tool for understanding the plastic response of metallic materials at length and time scales larger than what is possible with brute-force atomistic simulations. Yet, the DDD method must be advanced to consider interactions between dislocations and grain boundaries, for example, and to improve opportunities for connection to experiments. In this presentation, DDD simulations of dislocation transmission at grain boundaries (GBs) in Al will be presented, including a new model for the mechanical structure of equilibrium and non-equilibrium GBs via a disclination-dislocation framework. In addition, new virtual diffraction methods for DDD simulations will be presented, which are designed to enhance the connection between mesoscale simulations and experiments for validation.
Biography:
Dr. Spearot is the Newton C. Ebaugh Professor in the Department of Mechanical & Aerospace Engineering at the University of Florida. He also holds an affiliate appointment in the Department of Materials Science & Engineering. His research focuses on mechanical and thermodynamic properties of materials, with strong emphasis on the structure and behavior of dislocations and grain boundaries in metallic materials. His research group uses and advances atomistic and mesoscale simulation techniques with the intent to extract experimentally relevant properties or metrics from simulation generated data. Dr. Spearot was awarded the CAREER Award in 2010 from the National Science Foundation. He received the Teacher of the Year award in 2020 from the Department of Mechanical & Aerospace Engineering at the University of Florida. Dr. Spearot received his B.S. in Mechanical Engineering from the University of Michigan, and his M.S. and Ph.D. in Mechanical Engineering from the Georgia Institute of Technology.
Practical information
- General public
- Free
Organizer
- MEGA.Seminar Organizing Committee