While the application of the Smoothed Particle Hydrodynamics (SPH) method for the modeling of welding processes has become increasingly popular in recent years, little is yet known about the quantitative predictive capability of this method. We propose a novel SPH model for the simulation of the tungsten inert gas (TIG) spot welding process and conduct a thorough comparison between our SPH implementation and two Finite Element Method (FEM) based models. In order to be able to quantitatively compare the results of our SPH simulation method with grid based methods we additionally propose an improved particle to grid interpolation method based on linear least-squares with an optional hole-filling pass which accounts for missing particles. We show that SPH is able to yield excellent results, especially given the observed deviations between the investigated FEM methods and as such, we validate the accuracy of the method for an industrially relevant engineering application.

中文翻译：

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TIG点焊中SPH的定量评价

近年来，平滑粒子流体动力学 (SPH) 方法在焊接过程建模中的应用越来越流行，但对该方法的定量预测能力知之甚少。我们提出了一种用于模拟钨惰性气体 (TIG) 点焊过程的新型 SPH 模型，并对我们的 SPH 实施和两个基于有限元方法 (FEM) 的模型进行了彻底的比较。为了能够定量比较我们的 SPH 模拟方法的结果与基于网格的方法的结果，我们另外提出了一种基于线性最小二乘法的改进的粒子到网格插值方法，具有可选的孔填充通道，该方法可以解决丢失的粒子。我们表明 SPH 能够产生出色的结果，