加性搅拌摩擦沉积模拟的有限体积框架

IF 1.5 4区 材料科学 Q3 ENGINEERING, MECHANICAL
Kellis Kincaid, David W. MacPhee, G. Stubblefield, J. Jordon, T. Rushing, P. Allison
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引用次数: 2

摘要

在这项研究中,开发、验证了一个有限体积模拟框架,并首次将其用于一种新的固态增材制造和修复工艺,即增材摩擦搅拌沉积(AFSD)。开源计算流体力学(CFD)代码OpenFOAM用于模拟单层铝合金6061原料在基底上的沉积,使用粘塑性模型来预测材料的流动行为。考虑了构建层、周围大气和基底之间的共轭传热,并根据三种加工情况下记录的实验数据验证了所得温度。模拟温度数据和测量温度数据之间取得了良好的一致性,并对整个构建层形态进行了良好的定性预测。对温度场进行了进一步的分析,以揭示温度在构建方向上的变化,这是以前的实验或数值方法无法进行的分析,以及全局传热分析,以确定各种热输入和冷却模式的相对重要性。工具加热被发现是系统的主要热输入,占能量输入的73%,而传导到基底是零件冷却的主要模式,占构建层热损失的73%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A Finite Volume Framework for the Simulation of Additive Friction Stir Deposition
In this study, a finite volume simulation framework was developed, validated, and employed for the first time in a new solid-state additive manufacturing and repair process, Additive Friction Stir Deposition (AFSD). The open-source computational fluid dynamics (CFD) code OpenFOAM was used to simulate the deposition of a single layer of Aluminum Alloy 6061 feedstock onto a substrate, using a viscoplastic model to predict the flow behavior of the material. Conjugate heat transfer was considered between the build layer, the surrounding atmosphere, and the substrate, and the resulting temperatures were validated against experimental data recorded for three processing cases. Excellent agreement between simulated and measured temperature data was obtained, as well as a good qualitative prediction of overall build layer morphology. Further analysis of the temperature field was conducted to reveal the variation of temperature in the build direction, an analysis not possible with previous experimental or numerical methods, as well as a global heat transfer analysis to determine the relative importance of various modes of heat input and cooling. Tool heating was found to be the primary heat input to the system, representing 73% of energy input, while conduction to the substrate was the main mode of part cooling, representing 73% of heat loss from the build layer.
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来源期刊
CiteScore
3.00
自引率
0.00%
发文量
30
审稿时长
4.5 months
期刊介绍: Multiscale characterization, modeling, and experiments; High-temperature creep, fatigue, and fracture; Elastic-plastic behavior; Environmental effects on material response, constitutive relations, materials processing, and microstructure mechanical property relationships
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