Modeling mixed microstructures using a multi-level cellular automata finite element framework
Modeling mixed microstructures using a multi-level cellular automata finite element framework
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DOI：
10.1016/j.commatsci.2009.10.012
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发表时间：
2010
影响因子：
3.3
通讯作者：
Sumitesh Das
中科院分区：
文献类型：
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作者：
Sumitesh Das
钢的热机械加工 (TMP) 旨在产生具有卓越机械性能潜力的混合微观结构。值得注意的是，在铁素体中形成马氏体或贝氏体岛，从而产生高强度双相钢。随着汽车行业对此类钢材的需求不断增加，了解和预测此类钢材制造过程中的变形行为和载荷要求变得非常重要。有限元最适合分析作为应力、应变和温度场函数的变形行为。然而，在有限元框架内通过计算表示这些混合微观结构的所有方面是一个挑战。这是因为混合微观结构的成分在不同的长度尺度上演化，例如：亚微米到微米，而有限元技术在毫米尺度上效果最好。该论文描述了一种多级元胞自动机框架，能够捕获亚微米和微米长度尺度的微观特征。该框架与商用数字代码 ABAQUS™ 集成，并针对平面应变压缩模拟进行了测试。本文最后总结了使用该框架创建设计微观结构的潜力。
Thermo-mechanical processing (TMP) of steels are designed to yield mixed microstructures with a potential of superior mechanical properties. Prominently, creation of martensite or bainite islands in ferrite resulting in high strength dual phase steels. With the increasing demands of such steels from the automotive sector, the need to understand and predict the deformation behaviour and load requirements during the manufacture of such steels has become important. Finite elements are best suited to analyse the deformation behaviour as a function of stress, strain and temperature fields. However, representing all the facets of these mixed microstructures computationally within the finite element framework is a challenge. This is because constituents of the mixed microstructure evolve at different length scales e.g. sub-microns to microns while the finite element technique works best at the millimeter scale. The paper describes a multi-level cellular automata framework amenable to capture micro-features across the sub-micron and microns length scales. The framework is integrated with a commercially available numerical code, ABAQUS™ and tested for a plane strain compression simulation. The paper concludes with the potential of using the framework for creating designer microstructures.