Molski Krzysztof L, Tarasiuk Piotr
Bialystok University of Technology, Faculty of Mechanical Engineering, Wiejska 45C, 15-351 Bialystok, Poland.
Materials (Basel). 2020 Apr 11;13(8):1798. doi: 10.3390/ma13081798.
This paper deals with the analysis of stress concentration at the weld toe of a Double-V and a Single-V butt-welded joints subjected to tensile, bending and shearing loads. For each geometrical and loading case accurate close form stress concentration factor formula based on more than 3.3 thousand finite element method solutions were obtained. The percentage error of the formulas is lower than 2.5% for a wide range of values of geometrical parameters including weld toe radius, weld width, plate thickness and weld toe angle. The limiting case, in which the weld toe radius tends to zero is also considered. In the cases of shearing loads, a plane model based on thermal analogy was developed. The whole analysis was performed assuming that a circular arc represents the shape of the excess weld metal. Presented solutions may be used in computer aided fatigue assessment of structural elements.
本文研究了承受拉伸、弯曲和剪切载荷的双V形和单V形对接焊接接头焊趾处的应力集中分析。对于每种几何形状和加载情况，基于超过3300个有限元法解，获得了精确的封闭形式应力集中系数公式。对于包括焊趾半径、焊缝宽度、板厚和焊趾角度在内的广泛几何参数值，这些公式的百分比误差低于2.5%。还考虑了焊趾半径趋于零的极限情况。在剪切载荷情况下，开发了基于热模拟的平面模型。整个分析是在假设用圆弧表示多余焊缝金属形状的前提下进行的。给出的解可用于结构元件的计算机辅助疲劳评估。
