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Engineering Model of Metal Active Gas Welding Process for Efficient Distortion Analysis

机译:用于有效变形分析的金属活性气体焊接工艺工程模型

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This study presents a computational framework for an efficient distortion analysis based on coupled process-mechanics modeling of metal active gas (MAG) welding. For coupled process-mechanics analysis, an integrated simulation model between bead formation, thermal conduction, and thermo-mechanical behaviors during MAG welding was developed. A combined bead formation and thermal conduction model provided bead surface and temperature profiles during welding from welding process conditions. Then, heat source parameters estimated based on welding process conditions enabled a predictive simulation of MAG welding process. The bead surface and temperature profiles obtained were used for a large deformation thermal elastic–plastic analysis of weld angular distortion. The calculations were compared with the measurements, which were obtained in a previous study, under the same welding process conditions to validate the developed analysis model. From the comparison results, we concluded that the developed model has great potential to be efficient distortion analysis that estimate weld angular distortion from welding process conditions with a high degree of accuracy. Additionally, the effect of welding process conditions on weld bead morphology, temperature profiles, and angular distortion were discussed through the developed analysis model to obtain a more detailed understanding of dominant factor influencing the weld angular distortion of MAG welded structural steel plates.
机译:这项研究提出了基于金属活性气体(MAG)焊接的耦合过程-机械模型的有效变形分析的计算框架。为了进行耦合的过程力学分析,开发了在MAG焊接过程中焊道形成,导热和热力学行为之间的集成仿真模型。结合焊道形成和热传导模型,可根据焊接工艺条件在焊接过程中提供焊道表面和温度分布。然后,基于焊接工艺条件估算的热源参数实现了MAG焊接工艺的预测性仿真。获得的焊道表面和温度曲线用于焊接角变形的大变形热弹塑性分析。在相同的焊接工艺条件下,将计算结果与先前研究中获得的测量值进行比较,以验证所开发的分析模型。从比较结果中,我们得出结论,所开发的模型具有进行高效变形分析的潜力,该变形分析可以根据焊接工艺条件以高准确度估算焊接角度变形。此外,通过开发的分析模型,讨论了焊接工艺条件对焊缝形态,温度曲线和角度变形的影响,以更详细地了解影响MAG焊接结构钢板的焊接角度变形的主要因素。

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