| About this Abstract |
| Meeting |
2016 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Modeling and Prevention
|
| Presentation Title |
Multi-Scale Crystal Plasticity FE Models for Predicting Fatigue in Polycrystalline Metals and Alloys |
| Author(s) |
Somnath Ghosh, Deniz Ozturk, Ahmad Shaba |
| On-Site Speaker (Planned) |
Somnath Ghosh |
| Abstract Scope |
The ICMSE initiative entails integration of information across length and time scales for relevant materials phenomena and enables concurrent analysis of manufacturing, design, and materials. This talk will present various modules in the development of a microstructure based modeling of fatigue crack initiation in polycrystalline alloys. The model implements crystal plasticity theory with explicit grain structures and the mechanical response of polycrystalline aggregates are deduced from the behavior of constituent crystal grains. These calculations provide a platform for the implementation of physics-based crack evolution criterion that accounts for the effects of microstructural inhomogeneity. Systematic development of a crystal plasticity-based fatigue crack nucleation model is conducted. The presentation will also discuss a wavelet transformation based multi-time scaling (WATMUS) algorithm for accelerated crystal plasticity finite element simulations. The method significantly enhances computational efficiency in comparison with conventional single time scale integration methods. |
| Proceedings Inclusion? |
Planned: Publication Outside of TMS (Indicate publication title and publisher if known.) |