This paper models the uniaxial compression of a single crystal of commercial purity aluminum, and compares the modeling results with experimental data. The problem is solved using a first-type direct model based on the finite element method. The material behavior is described by a crystal elastoviscoplasticity model that explicitly accounts for shearing on crystallographic planes. The main feature of this study is a physically sound description of the geometric nonlinearity associated with crystal lattice rotation. The modeling results show that the original homogeneous single crystal is divided into volumes with different plastic shear rate intensity and lattice orientation, which is in satisfactory agreement with experimental data.

中文翻译：

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直接晶体弹粘塑性模型：在单晶变形研究中的应用

本文模拟了商业纯铝单晶的单轴压缩，并将模拟结果与实验数据进行了比较。该问题使用基于有限元方法的第一类直接模型来解决。材料行为由晶体弹粘塑性模型描述，该模型明确解释了晶体平面上的剪切。这项研究的主要特点是对与晶格旋转相关的几何非线性的物理上合理的描述。建模结果表明，原始均质单晶被分成具有不同塑性剪切速率强度和晶格取向的体积，与实验数据吻合较好。