2D multi-phase-field lattice Boltzmann simulations of semi-solid shear deformation
2D multi-phase-field lattice Boltzmann simulations of semi-solid shear deformation
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DOI：
10.1088/1757-899x/1274/1/012045
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发表时间：
2023-01
期刊：
影响因子：
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通讯作者：
N. Yamanaka;S. Sakane;T. Takaki
中科院分区：
文献类型：
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作者：
N. Yamanaka;S. Sakane;T. Takaki
固液共存区域的变形强烈影响铸造应用中凝固缺陷的形成。因此，了解半固态变形的机理至关重要。本研究使用多相场晶格玻尔兹曼模型（MPF-LBM），该模型可以模拟具有固体运动和液体流动的多晶凝固，以模拟具有各种晶粒形状和固体分数的二维半固态剪切变形。结论是 MPF-LBM 可以表达半固态变形的特征行为，例如雷诺剪胀和剪切带，具体取决于晶粒形状和固体分数。
The deformation of solid–liquid coexistence regions strongly affects the formation of solidification defects in casting applications. Thus, understanding the mechanism of semi-solid deformation is crucial. This study used the multi-phase-field lattice Boltzmann model (MPF-LBM), which can simulate polycrystalline solidification with solid motion and liquid flow, to simulate two-dimensional semi-solid shear deformation with various grain shapes and solid fractions. It was concluded that the MPF-LBM could express the characteristic behaviors of semi-solid deformation, such as the Reynolds’ dilatancy and shear band, depending on the grain shape and solid fraction.