This paper presents a novel numerical model, based on the finite element (FE) method, for the simulation of a welding process aimed to make a two‐pass V‐groove butt joint, paying attention on the prediction of residual stresses and distortions. The ‘element birth and death’ technique for the simulation of the weld filler supply has been considered within this paper. The main advancements with respect to the state of the art herein proposed concern: (i) the development of a modelling technique able to simulate the plates interaction during the welding operation when an only plate is modelled. This phenomenon is usually neglected in literature; (ii) the heat amount is supplied to the FEs as volumetric generation of the internal energy, allowing overcoming the time‐consuming calibration phase needed to use the Goldak's model, commonly adopted in literature. Predicted results showed a good agreement with experimental ones.

中文翻译：

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对接焊缝温度场和残余应力的数值评估及与实验测量的比较

本文提出了一种基于有限元（FE）方法的新型数值模型，用于模拟旨在形成两道V型槽对接的焊接过程，并着重于预测残余应力和变形。本文中已经考虑了模拟焊缝填充物供应量的“元素生与死”技术。在此提出的关于现有技术的主要进展涉及：（i）一种建模技术的发展，该建模技术能够在仅对板进行建模时模拟在焊接操作期间的板相互作用。这种现象通常在文献中被忽略；（ii）将热量作为内部能量的体积生成提供给FE，从而克服了使用Goldak模型所需的耗时的校准阶段，在文学中普遍采用。预测结果与实验结果吻合良好。