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Modelling of anisotropic work-hardening behaviour of metallic materials subjected to strain-path changes

机译:应变路径变化对金属材料各向异性加工硬化行为的建模

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摘要

The present paper aims at reviewing some recent progress in developing advanced constitutive models which are devoted to the description of the anisotropic work-hardening behaviour under strain-path changes at large strains of metallic materials. After reviewing some microscopic and macroscopic experimental evidence, a physically-based phenomenological model using four internal state tensor variables is presented. This model can be simplified into several classical phenomenological models in order to take into account either the isotropic or the kinematic hardening or both. The implementation of the proposed models in the in-house finite element code DD3IMP is briefly recalled. Numerical simulations of the stamping of a curved rail are carried out in order to evaluate the accuracy and the efficiency of the proposed models in modelling the springback.
机译:本文旨在回顾一些先进的本构模型的最新进展,这些模型致力于描述金属材料大应变下应变路径变化下的各向异性加工硬化行为。在回顾了一些微观和宏观实验证据之后,提出了一个使用四个内部状态张量变量的基于物理的现象学模型。该模型可以简化为几种经典的现象学模型,以便考虑各向同性或运动学硬化或两者兼而有之。简要回顾了在内部有限元代码DD3IMP中提出的模型的实现。为了评估所提出的模型在回弹建模中的准确性和效率,对弯曲轨道的冲压进行了数值模拟。

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