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Article

Investigation on Plastic Flow Behaviors of FCC Polycrystalline Aluminum under Pre-Cyclic Tension-Compression Loading: Experiments and Crystal Plasticity Modeling

by 1, 1 and 2,*
1
Key Laboratory of Disaster Prevention and Structural Safety/Guangxi Key Lab Disaster Prevention and Engineering Safety, College of Civil and Architectural Engineering, Guangxi University, Nanning 530004, China
2
School of Landscape Architecture, Zhejiang A & F University, Hangzhou 311300, China
*
Author to whom correspondence should be addressed.
Academic Editor: Olivier Thomas
Nanomaterials 2021, 11(9), 2397; https://doi.org/10.3390/nano11092397
Received: 21 July 2021 / Revised: 27 August 2021 / Accepted: 3 September 2021 / Published: 14 September 2021
(This article belongs to the Special Issue Simulation and Modeling of Nanomaterials)
The plastic flow behaviors of FCC polycrystalline aluminum after pre-cyclic tension-compression deformation are mainly investigated in tension–torsion stress space by the physically based crystal plasticity model introducing a back-stress. A global finite element model (GFEM) constructed of sufficient grains was established to simulate the same-size thin-walled tube specimen constrained and loaded as the experiments of yield surfaces. The computational results showed that the shape of subsequent yield surfaces and the plastic flow directions directly depended on the given offset strain levels and the applied re-loading paths under different pre-cyclic deformations. The angle deviation between the plastic flow direction and the theoretical orthogonal direction further indicated that there was a large difference between them in the inverse pre-straining direction, but the difference was negligible in the pre-straining direction. From the influence of the anisotropic evolution of the subsequent yield surfaces on plastic flow, we found that the plastic normality rule followed the smooth yield locus; conversely, the significant non-associated flow was attributed to the distorted yield locus. Furthermore, it was also demonstrated that the anisotropic evolution and the plastic flow trend of the subsequent yield surfaces obtained by experiments can be better reproduced by the crystal plasticity model. View Full-Text
Keywords: yield surface; plastic flow; crystal plasticity; polycrystalline aluminum yield surface; plastic flow; crystal plasticity; polycrystalline aluminum
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MDPI and ACS Style

Lu, D.; Zhang, K.; Hu, G. Investigation on Plastic Flow Behaviors of FCC Polycrystalline Aluminum under Pre-Cyclic Tension-Compression Loading: Experiments and Crystal Plasticity Modeling. Nanomaterials 2021, 11, 2397. https://doi.org/10.3390/nano11092397

AMA Style

Lu D, Zhang K, Hu G. Investigation on Plastic Flow Behaviors of FCC Polycrystalline Aluminum under Pre-Cyclic Tension-Compression Loading: Experiments and Crystal Plasticity Modeling. Nanomaterials. 2021; 11(9):2397. https://doi.org/10.3390/nano11092397

Chicago/Turabian Style

Lu, Damin, Keshi Zhang, and Guijuan Hu. 2021. "Investigation on Plastic Flow Behaviors of FCC Polycrystalline Aluminum under Pre-Cyclic Tension-Compression Loading: Experiments and Crystal Plasticity Modeling" Nanomaterials 11, no. 9: 2397. https://doi.org/10.3390/nano11092397

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