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Knowledge Based Cloud FE Simulation of Sheet Metal Forming Processes

机译:基于知识的钣金成形过程云有限元模拟

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摘要

The use of Finite Element (FE) simulation software to adequately predict the outcome of sheet metal forming processes is crucial to enhancing the efficiency and lowering the development time of such processes, whilst reducing costs involved in trial-and-error prototyping. Recent focus on the substitution of steel components with aluminum alloy alternatives in the automotive and aerospace sectors has increased the need to simulate the forming behavior of such alloys for ever more complex component geometries. However these alloys, and in particular their high strength variants, exhibit limited formability at room temperature, and high temperature manufacturing technologies have been developed to form them. Consequently, advanced constitutive models are required to reflect the associated temperature and strain rate effects. Simulating such behavior is computationally very expensive using conventional FE simulation techniques.This paper presents a novel Knowledge Based Cloud FE (KBC-FE) simulation technique that combines advanced material and friction models with conventional FE simulations in an efficient manner thus enhancing the capability of commercial simulation software packages. The application of these methods is demonstrated through two example case studies, namely: the prediction of a material's forming limit under hot stamping conditions, and the tool life prediction under multi-cycle loading conditions.
机译:使用有限元(FE)仿真软件来充分预测钣金成形过程的结果,对于提高效率并减少此类过程的开发时间,同时降低试错原型的制造成本至关重要。最近在汽车和航空航天领域中,人们越来越关注用铝合金替代品替代钢制部件,因此,对于更复杂的部件几何形状,越来越需要模拟此类合金的成形行为。然而,这些合金,特别是它们的高强度变体,在室温下表现出有限的可成形性,并且已经开发了高温制造技术来形成它们。因此,需要先进的本构模型来反映相关的温度和应变率效应。使用常规的有限元模拟技术来模拟这种行为在计算上非常昂贵。本文提出了一种新颖的基于知识的云有限元(KBC-FE)模拟技术,该技术将先进的材料和摩擦模型与常规有限元模拟有效地结合在一起,从而增强了商业化的能力。模拟软件包。通过两个示例案例研究证明了这些方法的应用,即:在热冲压条件下预测材料的成形极限,以及在多循环载荷条件下预测工具的寿命。

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