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PRISMS-Plasticity: An open-source crystal plasticity finite element software
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BCC_Polycrystal_Tension:
In this example, the capability of the PRISMS-Plasticity CPFE software to model BCC polycrystalline samples is demonstrated. To do so, the response of a polycrystalline sample of the β titanium alloy Timetal 21S during uniaxial tension is modeled. The results can be compared to simulation results reported by Qidwai et al. (2009).
FCC_Polycrystal_NeperConformingMesh:
Here, the PRISMS-Plasticity CPFE software is used to replicate the results presented by Anand and Kothari (1996) for polycrystalline OFHC copper with initial random orientations during a compression experiment. A polycrystalline copper sample consists of 200 randomly oriented grains is generated using Neper. The conforming FE discretization was generated from the Neper output by converting the tetrahedral elements to hexahedral elements using the tet-to-hex converter which is included as a utility software within the PRISMS-Plasticity CPFE code.
FCC_Polycrystal_NeperNonConformingMesh:
Here, the PRISMS-Plasticity CPFE software is used to replicate the results presented by Anand and Kothari (1996) for polycrystalline OFHC copper with initial random orientations during a compression experiment. A polycrystalline copper sample consists of 200 randomly oriented grains is generated using Neper. The nonconforming FE discretization with a regular 32×32×32 mesh was generated to model the polycrystalline sample.
FCC_Polycrystal_RandomOrientationBlock:
Here, the PRISMS-Plasticity CPFE software is used to replicate the results presented by Anand and Kothari (1996) for polycrystalline OFHC copper with initial random orientations during a compression experiment. the isotropic polycrystalline sample is modeled as an aggregate of 400 single crystals with random orientations, with each grain being modeled by a single eight-node linear hexahedral element. Accordingly, a 5×8×10 FE cubic mesh is generated in the x, y, and z directions, which each element represents a single grain.
HCP_Polycrystal_Compression:
The twinning model used in PRISMS-Plasticity CPFE, simulation results are compared against the experimental results during uniaxial compression test reported by Wu (2009) for extruded Mg alloy ZK60A sample at room temperature. The polycrystalline sample is modeled as an aggregate of 1080 single crystals, which reproduces the extruded sample, each grain being modeled by a single eight-node linear hexahedral element. Accordingly, an 8×9×15 FE cubic mesh is generated in the x, y, and z directions, in which each element represents a single grain.
HCP_Polycrystal_Tension:
The twinning model used in PRISMS-Plasticity CPFE, simulation results are compared against the experimental results during uniaxial tension test reported by Wu (2009) for extruded Mg alloy ZK60A sample at room temperature. The polycrystalline sample is modeled as an aggregate of 1080 single crystals, which reproduces the extruded sample, each grain being modeled by a single eight-node linear hexahedral element. Accordingly, an 8×9×15 FE cubic mesh is generated in the x, y, and z directions, in which each element represents a single grain. This work was supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Award#DE-SC0008637 as part of the Center for Predictive Integrated Structural Materials Science (PRISMS Center) at University of Michigan. We also acknowledge the financial cost-share support of University of Michigan College of Engineering and Office of the Vice President for Research. PRISMS Center, Materials Science and Engineering, University of Michigan, , Ann Arbor, MI 48109, USA. |
Mohammadreza Yaghoobi, Sriram Ganesan, Srihari Sundar, Aaditya Lakshmanan, Shiva Rudraraju, John E. Allison, Veera Sundararaghavan |
Twinning
Crystal plasticity finite element
PRISMS-Plasticity
Open source software
Parallel performance
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4 years ago |
4 years ago |
2021-04-19 17:11:30 |
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Extension twinning in rolled Mg alloy WE43
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The present work investigates the extension twinning in rolled Mg alloy WE43 using a combination of scanning electron microscopy with digital image correlation (SEM-DIC) and crystal plasticity finite element (CPFE) simulation. Rolled Mg alloy WE43 was subjected to in-situ uniaxial compression along its rolling direction. Full-field displacement maps were gathered using SEM-DIC during load pauses, and twin variant maps were obtained from these displacements using post-processing analysis. CPFE was used to investigate the experimental results via a multi-scale twinning model developed for HCP polycrystals. In addition to stress-strain curves, crystal plasticity parameters were calibrated using the variation of twin area versus the applied strain to accurately capture the twinning parameters. A new SEM-DIC pipeline was also developed for the open-source PRISMS-Plasticity CPFE software that can read in the precise deformation map generated by SEM-DIC experiment as an input boundary condition for the finite element simulation and conduct the CPFE simulation. It is shown that CPFE can successfully capture the macroscopic response and model both strain and twin area fraction maps. However, the model cannot capture sharp strain localization and twinning bands, instead it smears certain areas of localizations. |
Mohammadreza Yaghoobi, Zhe Chen, Veera Sundararaghavan, John E. Allison, Samantha Daly |
Magnesium
Twinning
Crystal plasticity finite element
PRISMS-Plasticity
Digital image correlation
Deformation mechanisms
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4 years ago |
4 years ago |
2021-04-12 13:31:55 |