About this Abstract |
Meeting |
6th International Congress on 3D Materials Science (3DMS 2022)
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Symposium
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6th International Congress on 3D Materials Science (3DMS 2022)
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Presentation Title |
Implementing Nonlocal Ductile Damage into a Large Strain FFT-based Model for Predicting Failure in 3D Polycrystalline Materials |
Author(s) |
Carter Cocke, Hadi Mirmohammad, Owen Kingstedt, Miroslav Zecevic, Ricardo Lebensohn, Ashley Spear |
On-Site Speaker (Planned) |
Carter Cocke |
Abstract Scope |
Previously developed crystal plasticity finite element method (CP-FEM) models have incorporated porous plasticity or continuum damage mechanics (CDM) to predict ductile failure in polycrystals. However, such CP-FEM models require significant computational resources. Crystal plasticity fast Fourier transform (CP-FFT) models are a growing alternative as they can accurately predict micromechanical fields with significantly reduced computational cost compared to traditional CP-FEM models. However, a need remains to incorporate degradation mechanisms into CP-FFT models to predict ductile failure in polycrystalline materials. This work incorporates a nonlocal triaxiality-based CDM formulation into a large-strain elasto-viscoplastic fast Fourier transform (LS-EVPFFT) model to predict ductile failure in 3D polycrystalline materials. Macroscopic and micromechanical responses are compared between LS-EVPFFT simulations and mesoscale copper tensile specimens experimentally characterized with electron backscatter diffraction and in situ digital image correlation. The computational efficiency of the LS-EVPFFT model with CDM enables tractable predictions of the entire elastic-plastic-failure loading process of polycrystalline materials. |
Proceedings Inclusion? |
Definite: Other |