A large number of massive crystal-plasticity-finite-element (CPFE) simulations are performed and post-processed to reveal the effects of element type and mesh resolution on accuracy of predicted mechanical fields over explicit grain structures. A CPFE model coupled with Abaqus/Standard is used to simulate simple-tension and simple-shear deformations to facilitate such quantitative mesh sensitivity studies. A grid-based polycrystalline grain structure is created synthetically by a phase-field simulation and converted to interface-conformal hexahedral and tetrahedral meshes of variable resolution. Procedures for such interface-conformal mesh generation over complex shapes are developed. FE meshes consisting of either hexahedral or tetrahedral, fully integrated as linear or quadratic elements are used for the CPFE simulations. It is shown that quadratic tetrahedral and linear hexahedral elements are more accurate for CPFE modeling than linear tetrahedral and quadratic hexahedral elements. Furthermore, tetrahedral elements are more desirable due to fast mesh generation and flexibility to describe geometries of grain structures.

中文翻译：

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显式晶粒结构晶体塑性有限元建模的单元类型和网格分辨率的数值研究

执行和后处理大量大规模晶体塑性有限元 (CPFE) 模拟，以揭示单元类型和网格分辨率对显式晶粒结构上预测机械场精度的影响。CPFE 模型与 Abaqus/Standard 结合用于模拟简单拉伸和简单剪切变形，以促进此类定量网格敏感性研究。通过相场模拟综合创建基于网格的多晶晶粒结构，并将其转换为具有可变分辨率的界面共形六面体和四面体网格。开发了在复杂形状上生成这种界面共形网格的程序。有限元网格由六面体或四面体组成，完全集成为线性或二次元素，用于 CPFE 模拟。结果表明，二次四面体和线性六面体单元比线性四面体和二次六面体单元对 CPFE 建模更准确。此外，由于快速网格生成和描述晶粒结构几何的灵活性，四面体单元更受欢迎。