| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
| Presentation Title |
A Fatigue Calculation Workflow Considering Effects of Microstructure and Defects |
| Author(s) |
Junyan He, Anupam Neogi, Deepankar Pal, Ali Najafi, Grama Bhashyam |
| On-Site Speaker (Planned) |
Junyan He |
| Abstract Scope |
For additive manufactured parts, process parameters can influence fatigue life by controlling the microstructure and the formation of different types of defects. We propose a fatigue calculation workflow based on crystal plasticity simulations accounting for effects of microstructure. An in-house microstructure generation tool generates statistically equivalent instantiations of microstructures based on statistics extracted from experimental EBSD measurements. Synthetic defects, including surface roughness and internal voids, are overlaid onto the microstructure volumes. An in-house mesher smooths the grain boundaries and generates a conformal tetrahedral mesh. Crystal plasticity material model available in Ansys Mechanical is used to analyze the response of the volume under cyclic loading. Fatigue indicator parameter (FIPs) values are calculated based on the results of the crystal plasticity simulation, which is a good indicator for the fatigue crack formation driving forces. The distributions of FIPs for microstructures with surface roughness and those with internal voids will be compared. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, ICME, Modeling and Simulation |