利用数值模拟分析 WAAM 组件零件变形的热机械法与固有应变法比较研究

K. Prajadhiana, M.F. Mat, Y.H.P. Manurung, M. S. Adenan, T. Taufek, M.A. Ishak, M.A Mohammed, T. Ginta, A. Armansyah
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引用次数: 0

摘要

本研究利用先进的数值模拟,对 WAAM 工艺的零件变形进行了研究。WAAM 零件由不锈钢 SS316L 沉积层制成,该沉积层沉积在低碳钢 S235 基板上,以形成具有薄壁的空心矩形结构。本研究采用 Goldak 双椭圆体作为热源模型,并使用基于 von-Mises 屈服准则的各向同性硬化规则。本研究使用 MSC Marc/Mentat 作为数值 FE 软件。以商用 S235 低碳钢为基材,并通过 JMATPRO 扫描进化的 SS316L,作为材料建模的输入。为了减少 WAAM 数值模拟过程的计算时间,在 Marc 中提出了一种固有应变方法(ISM)用于 WAAM 数值模拟。本研究提出了两种 ISM 方法,第一种是基于计算的分析 ISM,第二种是使用虚拟校准测试(VCT)的校准 ISM。在获得基于 VCT 结果的 ISM 值后,利用数学软件 MATLAB 找到优化的 ISM 值。这项研究的最终目的是确定哪种数值模拟模型在预测部件变形结果的精度和计算时间方面具有明显优势。本研究的预期最终结果是,在 WAAM 数值模拟中实施 ISM 方法,能够以类似于 TMM 模型的准确方式预测零件变形,而且计算时间大大缩短。关键词WAAM、零件变形、数值模拟、固有应变法、计算时间。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Comparative Study between Thermo-Mechanical and Inherent Strain Method in Analysing Part Distortion of WAAM Component Using Numerical Simulation
This research investigates the part distortion of WAAM process by utilizing advanced numerical simulation. The WAAM component is made of a stainless steel SS316L deposition layer that is deposited on top of a mild steel S235 substrate plate to create a hollow, rectangular structure with a thin wall. In this study, Goldak's double-ellipsoid was used as the heat source model, and an isotropic hardening rule based on the von-Mises yield criterion was used. MSC Marc/Mentat is utilized as the numerical FE software for this research. The commercial S235 mild steel for substrate and the evolved SS316L was scanned by JMATPRO as the input for material modelling. In order to reduce the computational time of the numerical WAAM process, an Inherent Strain Method (ISM) is proposed for a numerical WAAM simulation in Marc. There are two ISM methods proposed for this study, the first is the analytical ISM based on the calculations and second is the calibration-based ISM using Virtual Calibration Test (VCT). On obtaining the ISM value based on the result of VCT, the mathematical software MATLAB were utilized to find the optimized ISM value. This research has a final purpose to determine which numerical simulation model that has a clear advantage on predicting the component deformation result in term of result accuracy as well as computational time. The expected final outcome of this study is the implementation of ISM method on numerical WAAM simulation is able to predict a part distortion in an accurate manner similar to TMM model with significantly faster computational time. Keywords: WAAM, Part Distortion, Numerical Simulation, Inherent Strain Method, Computational Time.
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