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首页> 外文期刊>ISIJ international >3D Coupled Cellular Automaton (CA)–Finite Element (FE) Modeling for Solidification Grain Structures in Gas Tungsten Arc Welding (GTAW)
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3D Coupled Cellular Automaton (CA)–Finite Element (FE) Modeling for Solidification Grain Structures in Gas Tungsten Arc Welding (GTAW)

机译：气体钨极电弧焊（GTAW）中凝固晶粒结构的3D耦合元胞自动机（CA）-有限元（FE）建模

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A coupled Cellular Automaton (CA) – Finite Element (FE) model is proposed to predict the grain structure formation during Gas Tungsten Arc Welding (GTAW). The FE model solves the heat flow problem based on an adaptive meshing. This is done on a first FE mesh. The CA model simulates the development of the envelope of the grains in the liquid. For that purpose, a second FE mesh, referred to as CA mesh, is used. Fields can be interpolated between the adaptive FE mesh and the CA mesh. A CA grid made of a regular lattice of cubic cells is defined and superimposed onto the CA mesh. A new dynamic strategy for the allocation/deallocation of the CA grid is proposed to reduce the computation and memory costs. This CAFE model is applied to partial melting of an initial grain structure and epitaxial growth in the undercooled zone of a liquid pool, thus simulating the formation of solidification structure during the GTAW process. Examples of single linear passes simulations for various processing conditions and a multiple pass simulation are presented.
机译：提出了一种耦合元胞自动机（CA）-有限元（FE）模型来预测钨极氩弧焊（GTAW）过程中的晶粒结构形成。有限元模型基于自适应网格化解决了热流问题。这是在第一个FE网格上完成的。 CA模型模拟了液体中颗粒包络的发展。为此，使用了第二个FE网格，称为CA网格。可以在自适应FE网格和CA网格之间插入字段。定义由立方晶格的规则晶格构成的CA网格，并将其叠加到CA网格上。提出了一种用于CA网格分配/取消分配的新动态策略，以减少计算和存储成本。该CAFE模型适用于初始晶粒结构的部分熔融和液池过冷区中的外延生长，从而模拟了GTAW工艺过程中凝固组织的形成。给出了针对各种加工条件的单次线性通过模拟和多次通过模拟的示例。

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