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Multiscale modelling of asymmetric rolling with an anisotropic constitutive law

机译:各向异性本构法的不对称轧制的多尺度建模

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摘要

A parametric study is presented, which employs a new anisotropic constitutive law in order to study the influence of anisotropic plasticity on the deformation field of the Asymmetric Rolling (ASR) process. A version of thefacetmethod is presented, where an analytical yield function is restricted to the subspace of the stress and strain rate space relevant for 2D Finite Element Analysis (FEA), but can still accurately reproduce the plastic anisotropy of an underlying Crystal Plasticity (CP) model. The influence of anisotropy on the deformation field and corresponding texture evolution is examined in terms of the changes in texture component volume fractions and formation of texture gradients. It is found that a material with the anisotropy of a sharp cold-rolled aluminium alloy is more beneficial than that of a recrystallised hot-rolled aluminium alloy, and this influence of anisotropy suggests that Asymmetric Rolling (ASR) may be best carried out in the latest stages of cold rolling.
机译:提出了一种参数研究,其采用了一种新的各向异性本构规定法,以研究各向异性可塑性对不对称轧制(ASR)过程的变形场的影响。 提出了一种版本的替代方法,其中分析率函数仅限于对2D有限元分析(FEA)相关的应力和应变率空间的子空间,但仍然可以准确地再现潜在的晶体塑性(CP)的塑性各向异性 模型。 在质地成分体积分数的变化和纹理梯度形成方面,研究了各向异性对变形场和相应纹理演化的影响。 发现具有锋利的冷轧铝合金各向异性的材料比重结晶的热轧铝合金更有益,并且这种各向异性的影响表明不对称滚动(ASR)可以最好地进行 最新阶段冷轧。

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