Modeling heat transfer during friction stir welding using a meshless particle method
Modeling heat transfer during friction stir welding using a meshless particle method
复制标题
使用无网格粒子方法模拟搅拌摩擦焊过程中的传热
DOI：
10.1016/j.ijheatmasstransfer.2016.08.047
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发表时间：
2017
影响因子：
5.2
通讯作者：
Qinghua Li
中科院分区：
文献类型：
--
作者：
Yihua Xiao;Haifei Zhan;Yuantong Gu;Qinghua Li
搅拌摩擦焊 (FSW) 过程中的传热建模对于理解焊接机理和优化工艺参数至关重要。由于FSW中的传热通常伴随着材料流动，无网格方法可以轻松处理拉格朗日框架中的大变形，因此对于FSW建模很有前景。在本文中，我们开发了一种无网格粒子方法来分析 FSW 过程中的瞬态传热。在所开发的方法中，采用基于粘着摩擦的热源模型来描述 FSW 的热量产生。采用具有一阶一致性的粒子近似来离散传热控制方程。提出了一种惩罚方法来施加不同的热边界条件，并引入了平滑算法来增强数值稳定性。首先给出两个算例来验证无网格粒子法的准确性和参数化效果。然后使用该方法模拟 12.7 毫米厚的 Al6061-T6 板 FSW 期间的传热。给出了计算出的温度分布，并与 FEM 计算出的温度分布进行了比较。发现所获得的热循环与实验获得的热循环非常一致。然后采用经验证的 Al6061-T6 板 FSW 模型来预测各种焊接参数和工具尺寸的最高温度、发热率和扭矩。
Modeling heat transfer during friction stir welding (FSW) process is crucial for understanding welding mechanism and optimizing process parameters. Since heat transfer is usually accompanied with the material flow in FSW, the meshless method, which can easily treat large deformation in a Lagrangian framework, is promising for FSW modeling. In this paper, we develop a meshless particle method for the analysis of transient heat transfer during FSW process. In the developed method, a heat source model based on sticking friction is implemented to describe the heat generation of FSW. A particle approximation with first-order consistency is employed to discretize the governing equation of heat transfer. A penalty method is proposed to impose different thermal boundary conditions, and a smoothing algorithm is introduced to enhance numerical stability. Two examples are firstly given to verify the accuracy and parametric effect of the meshless particle method. The method is then used to simulate heat transfer during FSW of 12.7 mm-thick Al6061-T6 plates. The calculated temperature distributions are presented and compared with those computed by FEM. The obtained thermal cycles are found to be in good agreement with those obtained from experiments. The validated model of FSW of Al6061-T6 plates is then employed to predict the maximum temperature, heat generation rate and torque for various welding parameters and tool dimensions.
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DOI：
10.1243/095440503762502297
发表时间：
2003-01
期刊：
Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture
影响因子：
--
作者：
M. Song;Radovan Kovacevic
通讯作者：
M. Song;Radovan Kovacevic
影响因子：
2.2
作者：
李庆华;肖毅华;张浩锋;平学成
通讯作者：
李庆华;肖毅华;张浩锋;平学成
影响因子：
5
作者：
Moubin Liu;W. Xie;Guirong Liu
通讯作者：
Moubin Liu;W. Xie;Guirong Liu
影响因子：
4.1
作者：
R. Batra;G. M. Zhang
通讯作者：
R. Batra;G. M. Zhang
影响因子：
4.1
作者：
Q. Ma
通讯作者：
Q. Ma