About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Algorithm Development in Materials Science and Engineering
|
Presentation Title |
Yield Surfaces of Face-centered Cubic Copper from Discrete Dislocation Dynamics and Geometric Prior Approach |
Author(s) |
Wu-Rong Jian, Mian Xiao, WaiChing Sun, Wei Cai |
On-Site Speaker (Planned) |
Wu-Rong Jian |
Abstract Scope |
Yield surface is a subset of stress states for a given internal state under which plastic deformation develops. Since the large number of data points are required to discover the geometry in the parametric space, it is not trivial to establish a yield surface with highly precise local features within a reasonable cost. By applying a GPU-accelerated discrete dislocation dynamics (DDD) simulator, we first cut the cost of the DDD simulations. Then, an adaptive geometric prior approach based on Gaussian curvature is used to estimate the most desirable loading paths to gather data for yield surface refinement. Finally, by breaking down the yield surface as a collection of coordinate charts, we establish a framework to construct yield surfaces with sharp local features efficiently and accurately. By means of plane stress loading in the DDD simulations, three-dimensional yield surfaces for different dislocation configurations of single crystal copper are built. |
Proceedings Inclusion? |
Planned: |
Keywords |
Modeling and Simulation, Mechanical Properties, Copper / Nickel / Cobalt |