Abstract The paper presents the results of metal inert gas T-joint fillet welding tests of small scale rectangular stiffened steel plates longer than the standard test specimen. In the literature the focus is typically on plates with a small aspect ratio and the present work deals with plates of higher aspect ratio, which are the typical ones in marine structures, aiming to determine if there is any significant effect of welding along the longitudinal direction. Nonlinear thermo-elasto-plastic finite element models are adopted to evaluate the temperature distribution, welding induced distortions and residual stress in the stiffened plates of shipbuilding steel. Given the difficulty in data acquisition of temperature-dependent properties of the material, a simplified model of the properties is proposed, based on the values at room temperature. Good agreement is observed between the measured and simulated temperatures, indicating that the current finite element approach is appropriate to simulate the welding process. The proposed simplified material model can be efficiently used in the finite element analysis of welded steel structures. It is concluded that the welding parameters have more significant influence on the structural responses than the dimension of the plate.

中文翻译：

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加筋长钢板试件焊接模拟试验与数值研究

摘要 本文介绍了长于标准试样的小型矩形加筋钢板的金属惰性气体T型接头角焊试验结果。在文献中，重点通常是小纵横比的板，而目前的工作涉及高纵横比的板，这是海洋结构中的典型板，旨在确定沿纵向焊接是否有任何显着影响. 采用非线性热弹塑性有限元模型对造船钢加筋板的温度分布、焊接引起的变形和残余应力进行评估。鉴于材料温度相关特性的数据采集困难，基于室温下的值，提出了一种简化的特性模型。在测量温度和模拟温度之间观察到良好的一致性，表明当前的有限元方法适用于模拟焊接过程。所提出的简化材料模型可以有效地用于焊接钢结构的有限元分析。结论是焊接参数对结构响应的影响比板的尺寸更显着。