About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Algorithms Development in Materials Science and Engineering
|
Presentation Title |
FFT-based Micromechanical Modeling of Stress fields at tip of an elliptical crack by using composite voxels |
Author(s) |
Vahid Tari, Christopher Kantzos, Anthony D. Rollett |
On-Site Speaker (Planned) |
Vahid Tari |
Abstract Scope |
FFT-based micromechanical methods operate on regular voxel grids. In general, the representation of an elliptical crack with regular voxels is stair-stepped at the crack line, resulting in oscillations that are mitigated by the use of partially-filled, i.e. composite voxels. We make use of composite voxels in elasto-viscoplastic formulations based on fast Fourier transforms (EVPFFT) to calculate the stress field around an elliptical crack. The results show that the use of composite voxels significantly reduces the spurious oscillations in predicted stress fields, and consequently improves the agreement between the EVPFFT simulations and analytical solutions. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, ICME, |