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Heat Source Models in Numerical Simulations of Laser Welding

机译：激光焊接数值模拟中的热源模型

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The article presents new possibilities for modifying heat source models in numerical simulations of laser welding processes conducted using VisualWeld (SYSWELD) software. Due to the different power distributions and shapes of a laser beams, it was necessary to propose a modification of heat source models and methods of defining the heat introduced into a welded material in the case of simulations of welding processes using solid-state and high-power diode lasers. A solution was proposed in the form of modification of predefined heat source models in the case of simulations of welding processes using solid-state disc lasers and high-power diode lasers (HPDL). Based on the results of metallographic tests and the acquisition of thermal cycles of real laser welding processes, the process of calibration and validation of the proposed models of heat sources depending on the type of device used as well as the obtained shapes of fusion beads was carried out. The purpose and assumptions of this approach towards creating heat sources were also reported, comparing exemplary stresses and cumulative plastic strain distributions for the calculation variant using a standard and modified heat source model.
机译：本文呈现了在使用VisualWeld（Sysweld）软件进行的激光焊接过程的数值模拟中修改热源模型的新可能性。由于激光束的不同功率分布和形状，有必要提出热源模型的改变以及在使用固态和高的焊接工艺模拟的情况下将引入到焊接材料中引入的热量的方法进行改变。电源二极管激光器。在使用固态盘激光器和高功率二极管激光器（HPDL）的焊接工艺模拟的情况下，提出了一种解决方案。基于金相试验的结果和实际激光焊接过程的热循环的获取，携带根据所用装置的类型的校准和验证的校准和验证的方法以及所使用的融合珠的形状的热源模型出去。还报道了这种方法的目的和假设，使用标准和修改的热源模型比较了计算变体的示例性应力和累积塑性应变分布。

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