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Multi-scale CAFE Modelling for Hot Deformation of Aluminium Alloys

机译:铝合金热变形的多尺度CAFE建模

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The multi-Scale CAFE modelling system utilises Cellular Automata, Finite Elements and a Hybrid Modelling technique which combines neuro-fuzzy models and physical equations to simulate hot deformation of Al-l%Mg aluminium alloys using the commercial finite element software package AB AQUS™. This paper addresses the issue of capturing microstructural details and providing macro linkage by simulating two phenomena. The first defines a suitable length scale such that numerical models are sufficient in detail and are appropriate in terms of computational time. The second is the feasibility using Cellular Automata (CA) as an additional technique that can be used in conjunction with a conventional Finite Elements (FE) representation to model material heterogeneity and related properties. This is done by identifying an abstract scale in between the micro and macro scales, termed the "mesoscale" to obtain a multi-scale CAFE modelling technique that utilises the CA technique to represent initial and evolving microstructural features at an appropriate length obtained using an overlying FE mesh.
机译:多尺度CAFE建模系统利用了元胞自动机,有限元和混合建模技术,该技术结合了神经模糊模型和物理方程,使用商业有限元软件包AB AQUS™模拟Al-1%Mg铝合金的热变形。本文通过模拟两种现象解决了捕获微观结构细节并提供宏观联系的问题。第一个定义了合适的长度标度,以使数值模型在细节上足够,并且在计算时间方面也合适。第二个是使用Cellular Automata(CA)作为附加技术的可行性,该技术可以与常规有限元(​​FE)表示结合使用来对材料异质性和相关特性进行建模。这是通过在微观和宏观尺度之间确定一个抽象尺度(称为“中间尺度”)来完成的,以获得一种多尺度CAFE建模技术,该技术利用CA技术以适当的长度来表示初始的和不断发展的微观结构特征,并利用上覆获得有限元网格。

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