Multi-Scale Modeling of Microstructure Evolution Induced Anisotropy in Metals
Multi-Scale Modeling of Microstructure Evolution Induced Anisotropy in Metals
复制标题
金属微观结构演化引起的各向异性的多尺度建模
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
T. Yalçinkaya
中科院分区：
文献类型：
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作者：
T. Yalçinkaya
本文提出了两种基于晶体塑性的计算本构模型，用于研究单调加载过程中塑性组织的本征形成及其在金属成形过程中应变路径变化时的变化演化。成形过程采用非凸应变梯度晶体塑性框架来模拟，可以模拟塑性组织的内在发展过程。通过引入晶体塑性框架的唯象本构方程来模拟应变路径变化下的演化。后者能够根据应变路径的变化来模拟瞬时各向异性效应(如交叉硬化、包辛格效应)。本文讨论了微观组织形成和演化过程的连续模拟模型的统一问题。
This paper presents two crystal plasticity based computational constitutive models for the intrinsic formation of plastic microstructure during monotonic loading and its altered evolution under strain path changes in metal forming operations. The formation step is modeled via a non-convex strain gradient crystal plasticity framework which could simulate the intrinsic development of the plastic microstructures. The evolution under strain path changes is modeled via phenomenologically based constitutive equations incorporated into crystal plasticity framework. The latter is capable of simulating the transient anisotropy effects (e.g. cross hardening, Bauschinger effect) depending on the change in the strain path. The paper discusses the unification of such models for the continuous modeling of microstructure formation and evolution processes.