Investigating mesh sensitivity and polycrystalline RVEs in crystal plasticity finite element simulations

Lim, Hojun; Battaile, Corbett Chandler.; Bishop, Joseph E.; Foulk, James W.

doi:10.1016/j.ijplas.2019.06.001

Cited by 73 publications

(31 citation statements)

References 75 publications

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“…The averaged local strain was also similar for both resolutions. The effect of mesh refinement on shear bands in CP-FEM simulations is well known and investigated thoroughly (Lim et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

On crystallographic aspects of heterogeneous plastic flow during ductile tearing: 3D measurements and crystal plasticity simulations for AA7075-T651

Morgeneyer

Khadyko

Buljac

et al. 2021

International Journal of Plasticity

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Section: Discussionmentioning

confidence: 99%

On crystallographic aspects of heterogeneous plastic flow during ductile tearing: 3D measurements and crystal plasticity simulations for AA7075-T651

Morgeneyer

Khadyko

Buljac

et al. 2021

International Journal of Plasticity

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“…In addition to cold working, there are also other mechanisms that are likely to cause the deviations observed between the predicted and experimental stress versus strain histories as it relates to strain hardening behavior and elongation at failure. Among these mechanisms, grain size effects (Ref 64 , 65 ) (e.g., Hall–Petch relationship (Ref 66 )), which require implementation of strain gradient plasticity models (Ref 67 ) in the model of this study, may also play a role.…”

Section: Resultsmentioning

confidence: 99%

3D Microstructure-Based Finite Element Simulation of Cold-Sprayed Al-Al2O3 Composite Coatings Under Quasi-Static Compression and Indentation Loading

et al. 2021

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This study developed microstructure-based finite element (FE) models to investigate the behavior of cold-sprayed aluminum–alumina (Al-Al 2 O 3 ) metal matrix composite (MMC) coatings subject to indentation and quasi-static compression loading. Based on microstructural features (i.e., particle weight fraction, particle size, and porosity) of the MMC coatings, 3D representative volume elements (RVEs) were generated by using Digimat software and then imported into ABAQUS/Explicit. State-of-the-art physics-based modeling approaches were incorporated into the model to account for particle cracking, interface debonding, and ductile failure of the matrix. This allowed for analysis and informing on the deformation and failure responses. The model was validated with experimental results for cold-sprayed Al-34 wt.% Al 2 O 3 and Al-46 wt.% Al 2 O 3 metal matrix composite coatings under quasi-static compression by comparing the stress versus strain histories and observed failure mechanisms (e.g., matrix ductile failure). The results showed that the computational framework is able to capture the response of this cold-sprayed material system under compression and indentation, both qualitatively and quantitatively. The outcomes of this work have implications for extending the model to materials design and for applications involving different types of loading in real-world application (e.g., erosion and fatigue).

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“…79 Hojun et al observe that the predicted von Mises stress values have a scatter of up to 11.7% when fewer than 100 elements are defined in individual grains. 80 This quantitative RVE convergence study ensures that the resulting simulation scatter due to inherent VT algorithm shortcomings is minimized to a reasonable level so that both VT and EBSD models represent the (statistically) same grain size distribution. One benefit of the VT method is convenience with respect to studying RVE convergence; this is due to the artificial nature of the model, whereby it is straight-forward to generate models with increasing numbers of grains for the same grain size distribution.…”

Section: Rve Converged Model Size Determinationmentioning

confidence: 96%

“…Von Mises stress values have a scatter of up to 11.7% when fewer than 100 elements are defined in individual grains 80 . This quantitative RVE convergence study ensures that the resulting simulation scatter due to inherent VT algorithm shortcomings is minimized to a reasonable level so that both VT and EBSD models represent the (statistically) same grain size distribution.…”

Section: Determination Of a Converged Definitive Vt Modelmentioning

confidence: 99%

A high-fidelity crystal-plasticity finite element methodology for low-cycle fatigue using automatic electron backscatter diffraction scan conversion: Application to hot-rolled cobalt–chromium alloy

Leen

Harrison

2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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The common approach to crystal-plasticity finite element modeling for load-bearing prediction of metallic structures involves the simulation of simplified grain morphology and substructure detail. This paper details a methodology for predicting the structure–property effect of as-manufactured microstructure, including true grain morphology and orientation, on cyclic plasticity, and fatigue crack initiation in biomedical-grade CoCr alloy. The methodology generates high-fidelity crystal-plasticity finite element models, by directly converting measured electron backscatter diffraction metal microstructure grain maps into finite element microstructural models, and thus captures essential grain definition for improved microstructure–property analyses. This electron backscatter diffraction-based method for crystal-plasticity finite element model generation is shown to give approximately 10% improved agreement for fatigue life prediction, compared with the more commonly used Voronoi tessellation method. However, the added microstructural detail available in electron backscatter diffraction–crystal-plasticity finite element did not significantly alter the bulk stress–strain response prediction, compared to Voronoi tessellation–crystal-plasticity finite element. The new electron backscatter diffraction-based method within a strain-gradient crystal-plasticity finite element model is also applied to predict measured grain size effects for cyclic plasticity and fatigue crack initiation, and shows the concentration of geometrically necessary dislocations around true grain boundaries, with smaller grain samples exhibiting higher overall geometrically necessary dislocations concentrations. In addition, minimum model sizes for Voronoi tessellation–crystal-plasticity finite element and electron backscatter diffraction–crystal-plasticity finite element models are proposed for cyclic hysteresis and fatigue crack initiation prediction.

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Investigating mesh sensitivity and polycrystalline RVEs in crystal plasticity finite element simulations

Cited by 73 publications

References 75 publications

On crystallographic aspects of heterogeneous plastic flow during ductile tearing: 3D measurements and crystal plasticity simulations for AA7075-T651

On crystallographic aspects of heterogeneous plastic flow during ductile tearing: 3D measurements and crystal plasticity simulations for AA7075-T651

3D Microstructure-Based Finite Element Simulation of Cold-Sprayed Al-Al2O3 Composite Coatings Under Quasi-Static Compression and Indentation Loading

A high-fidelity crystal-plasticity finite element methodology for low-cycle fatigue using automatic electron backscatter diffraction scan conversion: Application to hot-rolled cobalt–chromium alloy

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