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首页> 外文期刊>Journal of the Mechanics and Physics of Solids >Fast texture updates in fcc polycrystal plasticity based on a linear active-set-estimate of the lattice spin
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Fast texture updates in fcc polycrystal plasticity based on a linear active-set-estimate of the lattice spin

机译：基于晶格自旋的线性有效态估计，快速更新fcc多晶可塑性

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The paper presents a framework for a fast computational estimate of the texture evolution in fcc polycrystals. The underlying basis is a Taylor-type approach of rigid-plasticity for fcc crystals, where the decision of slip activity is based on a purely geometric argument in terms of the rate of total deformation. This approach allows a purely kinematic estimate of the texture evolution completely independent of the hardening response of the single crystal grains. We show that such a geometric estimate of the orientation microstructure provides very good approximations when compared with Taylor-type models of rigid viscoplasticity or elasto-plasticity of fcc crystals. It is shown for several deformation modes of polycrystalline aggregates that the geometric approach predicts the texture evolution very well in the range of large strains. In contrast to standard approaches for the analysis of texture, the proposed new method is extremely robust and very fast even for a high number of discrete grain orientations. As a consequence, such an approach provides a perfect base for large scale computations of anisotropy development in polycrystals.
机译：本文提出了一个框架，用于快速计算fcc多晶体的织构演变。基本的基础是fcc晶体的刚性塑性的泰勒式方法，其中滑动活动性的决定基于总变形率的纯粹几何参数。这种方法允许对纹理演变进行纯粹的运动学估计，而完全独立于单晶粒的硬化响应。我们表明，与fcc晶体的刚性粘塑性或弹塑性的Taylor型模型相比，这种取向微结构的几何估计提供了很好的近似值。对于多晶聚集体的几种变形模式，几何方法可以很好地预测大应变范围内的织构演变。与用于纹理分析的标准方法相比，即使对于大量离散的晶粒取向，所提出的新方法也非常健壮和非常快。因此，这种方法为大规模计算多晶各向异性发展提供了理想的基础。

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