Spectral Approaches for the Fast Computation of Yield Surfaces and First-Order Plastic Property Closures for Polycrystalline Materials with Cubic-Triclinic Textures
Spectral Approaches for the Fast Computation of Yield Surfaces and First-Order Plastic Property Closures for Polycrystalline Materials with Cubic-Triclinic Textures
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快速计算具有立方三斜晶格织构的多晶材料的屈服面和一阶塑性属性闭包的谱方法
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发表时间：
2010
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通讯作者：
S. Kalidindi
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作者：
H. Alharbi;M. Knezevic;S. Kalidindi
在最近的工作中，我们已经证明了基于DFT的光谱数据库的可行性和计算优势，以促进晶体塑性解决方案的面心立方（fcc）金属进行任意变形路径。在本文中，我们扩展和验证这些新的想法，体心立方（BCC）金属，表现出更大数量的潜在滑移系的应用。据观察，具有大量滑移系的体心立方金属的数据库比先前获得的具有少量滑移系的面心立方金属的数据库更紧凑。此外，我们在本文中证明，这些数据库可以有效地用于快速计算的屈服面预测的面心立方和体心立方金属的泰勒模型。作为新的DFT为基础的光谱数据库的许多优点的另一个演示，我们提出了一阶塑性性质关闭的基础上的泰勒模型的面心立方和体心立方金属。本文代表了第一次报告，这种封闭产生没有调用任何简化假设样本对称性。
In recent work, we have demonstrated the viability and computational advantages of DFT-based spectral databases for facilitating crystal plasticity solutions in face-centered cubic (fcc) metals subjected to arbitrary deformation paths. In this paper, we extend and validate the application of these novel ideas to bodycentered cubic (bcc) metals that exhibit a much larger number of potential slip systems. It was observed that the databases for the bcc metals with a larger number of slip systems were more compact compared to those obtained previously for fcc metals with a smaller number of slip systems. Furthermore, we demonstrate in this paper that these databases can be effectively used in the fast computation of yield surfaces predicted by the Taylor model for both fcc and bcc metals. As another demonstration of the many advantages of the novel DFT-based spectral databases, we present first-order plastic property closures based on the Taylor model for both fcc and bcc metals. This paper represents the first report of such closures produced without invoking any simplifying assumptions regarding sample symmetry.