The present work aims to study the influence of different geometrical, technological, and material parameters on residual stress in tungsten inert gas butt-welded aluminum cylinder. In order to present a simple analytical model to estimate the welding residual stress, the Taguchi L18 array has been employed with one 6-level factor and four 3-level factors. A 3D coupled thermo-mechanical finite element model considering temperature-dependent material properties has been developed to determine the welding residual stress in all experiments. The numerical model has been validated using the hole-drilling method. Using statistical analysis, the order of factors based on their effect on residual stress has been determined as yield strength, length, thickness, heat input, and finally diameter. The residual stress increases with an increase in yield strength, diameter, and heat input, while decreases with an increase in thickness. Contribution of each parameter on residual stress has been specified using variance analysis; yield strength with 99.6% contribution is the most significant factor, while diameter has insignificant impact. Finally, high accuracy equations have been proposed to calculate the welding residual stress.

中文翻译：

---

铝圆柱壳GTAW焊接残余应力有效参数的研究。

目前的工作旨在研究不同的几何，工艺和材料参数对惰性气体对焊铝缸中残余应力的影响。为了提供一个简单的分析模型来估计焊接残余应力，已使用Taguchi L18阵列使用一个6级因子和4个3级因子。已开发出一种考虑温度依赖性材料特性的3D耦合热机械有限元模型，以确定所有实验中的焊接残余应力。数值模型已经使用钻孔方法进行了验证。使用统计分析，已经确定了基于它们对残余应力影响的因素的顺序，即屈服强度，长度，厚度，热输入以及最终的直径。残余应力随着屈服强度，直径和热输入的增加而增加，而随着厚度的增加而减少。使用方差分析指定了每个参数对残余应力的贡献。最重要的因素是屈服强度，贡献率为99.6％，而直径的影响则微不足道。最后，提出了高精度方程来计算焊接残余应力。