Abstract Scope |
Fast Fourier Transform (FFT)-based methods, originally proposed at the turn of the century for composites [1] and extended to polycrystals (the most recent formulation, including non-local large-strain elasto-viscoplasticity reported in [2]), are attractive due their higher efficiency compared with crystal plasticity finite elements, and their direct use of voxelized microstructural images. In this talk, we report recent progress on FFT-based algorithms for micromechanical modelling of crystalline materials, including thermo-elasto-visco-plasticity, strain-gradient plasticity, creep, and dynamic effects. We show applications of these methods to: micromechanics of nano-metallic laminates, creep of steels, integration with 3-D characterization, and use for training and validation of machine-learning methods. [1] Moulinec, H., Suquet, P., A numerical method for computing the overall response of nonlinear composites with complex microstructure. CMAME 157, 69, 1998. [2] Zecevic M., Lebensohn R.A., Capolungo L., Non-local large-strain FFT-based formulation and its application to interface-dominated plasticity of nano-metallic laminates. JMPS 173, 105187, 2023. |