Kik Tomasz
Department of Welding Engineering, Silesian University of Technology, Konarskiego 18A, 44-100 Gliwice, Poland.
Materials (Basel). 2020 Jan 29;13(3):608. doi: 10.3390/ma13030608.
The article presents a comparison of modern computational techniques used in numerical analyses of welding processes. The principles of the "transient" technique calculations with a moving heat source, the "macro-bead" (MBD) technique, with an imposed thermal cycle on a selected weld bead section and the "local-global" approach with shrinkage calculation technique were described. They can be used, depending on the variant chosen, both for individual, simple weld joints and those made of many beads or constructions containing dozens of welds and welded elements. Differences in the obtained results and time needed to perform calculations with four different calculation examples of single and multipass arc and laser beam welding processes were presented. The results of calculations of displacements and stresses distributions in the welded joints using various computational techniques were compared, as well as the calculation times with the described techniques. The numerical analyses in the SYSWELD software package have shown the differences between the described computational techniques, as well as an understanding of the benefits and disadvantages of using each of them. This knowledge allows preparing an efficient and fast optimization of the welding processes, often aimed at minimizing deformations in the first place, as well as detection of potential defects of both simple and complex welded structures. In general, the possibilities and flexibility of modern numerical calculation software have been presented.
本文介绍了焊接过程数值分析中使用的现代计算技术的比较。描述了移动热源的“瞬态”技术计算原理、在选定焊缝截面施加热循环的“宏观焊道”（MBD）技术以及采用收缩计算技术的“局部-全局”方法。根据所选变体，它们可用于单个简单焊接接头，也可用于由多个焊道制成的接头或包含数十个焊缝和焊接元件的结构。给出了单道和多道电弧及激光束焊接过程的四个不同计算示例在计算结果和计算所需时间方面的差异。比较了使用各种计算技术计算焊接接头位移和应力分布的结果，以及使用所述技术的计算时间。SYSWELD软件包中的数值分析显示了所述计算技术之间的差异，以及对使用每种技术的优缺点的理解。这些知识有助于对焊接过程进行高效快速的优化，通常首先旨在使变形最小化，以及检测简单和复杂焊接结构的潜在缺陷。总体而言，展示了现代数值计算软件的可能性和灵活性。
