Date/Time
Date(s) - 04/09/2024
3:00 pm - 4:00 pm
Location
Rhines Hall 125
Categories
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 lengths and time scales.
In this presentation, recent atomistic simulation and discrete dislocation dynamics (DDD) simulation efforts in the Spearot Research Group will be summarized.
First, a brief introduction to atomistic simulation and DDD simulation techniques will be presented. This will be followed by a summary of several recent projects that illustrate hierarchical connections between simulation length scales. (1) Molecular dynamics simulations of dislocation mobility in FCC metals and its dependence on dislocation character angle and local stress state, including upscaling of data to improve DDD simulations. (2) DDD simulations of dislocation transmission at grain boundaries (GBs) in Al, including a method to incorporate the mechanical structure of equilibrium and non-equilibrium GBs from atomistic insight.
Bio
Douglas Spearot, Ph.D.
Newton C. Ebaugh Professor, Mechanical and Aerospace Engineering
University of Florida
Dr. Douglas Spearot is the Newton C. Ebaugh Professor in the Department of Mechanical & Aerospace Engineering at the University of Florida. He also has an affiliate appointment in the Department of Materials Science & Engineering. His research focuses on the mechanical and thermodynamic properties of materials, with emphasis on the structure and behavior of dislocations and grain boundaries in metallic materials under extreme conditions. 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. In 2024, he received the Herbert Wertheim Doctoral Dissertation Advisor/Mentoring Award. 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.