Numerical simulation of weld pool dynamics using a SPH approach
Numerical simulation of weld pool dynamics using a SPH approach
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使用 SPH 方法对熔池动力学进行数值模拟
DOI：
10.1007/s40194-018-0615-5
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发表时间：
2018
影响因子：
2.1
通讯作者：
U. Füssel
中科院分区：
文献类型：
--
作者：
M. Trautmann;M. Hertel;U. Füssel
在这篇文章中，我们提出了一个计算熔池动力学和由此产生的焊缝组织与电弧力有关的数值模型。该模型采用不可压缩光滑粒子流体力学方法，适用于空间分辨率高、计算量小的三维计算。该模型被应用于GTAW工艺，其中电弧力和电弧热输入是根据测量和文献中的已知值建模的。通过将计算的熔透轮廓与测量结果进行比较，验证了该模型在不同电弧电流情况下的有效性。最后，利用该模型对电弧压力和电弧剪切对熔透轮廓的影响进行了参数研究。参数研究表明，电弧力对熔透深度有很大影响。
In this paper, we present a numerical model for the calculation of weld pool dynamics and the resulting weld seam structure with regard to the arc forces. The model uses an incompressible smoothed particle hydrodynamics method and is suitable for three-dimensional calculations with a high spatial resolution at low computational costs. The model is applied to a GTAW process, where the arc forces as well as the arc heat input is modelled on the basis of known values from measurement and literature. The validity of the model is shown for different arc currents by comparison of the calculated penetration profile with measurements. Finally, the model is used to perform parameter studies on the influence of the arc pressure and the arc shear on the penetration profile. The parameter studies show the strong influences of the arc forces on the penetration depth.