Effect of the angular misalignment of laser welded T-joints on fatigue curves

被引：10
|
作者：
Oliveira, P., I [1 ]
Antunes, F., V [1 ]
Loureiro, A. [1 ]
Costa, J. M. [1 ]
机构：
[1] Univ Coimbra, Dept Mech Engn, Coimbra, Portugal
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2019年 / 128卷
关键词：
Laser beam welding; Angular misalignment; Fatigue strength; Aluminium thin plates; RESIDUAL-STRESSES; BUTT JOINTS; THIN; STRENGTH;
D O I：
10.1016/j.ijfatigue.2019.06.040
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
This paper investigates the angular misalignment of laser welded T-joints made of thin sheets of aluminium alloys and its effect on fatigue curves. The effect of welding parameters and weld dimensions on angular distortion is analysed by linear regressions. A nonlinear finite element model is set up to consider the effect of angular misalignment on stress. The fatigue curves show that the misalignment affects the scatter, slope and fatigue strength of the S-N curves. The IIW reference curves for nominal and structural stresses are suitable for the studied joints. FAT50 is recommended instead of FAT71 for effective notch stress.
引用
收藏
页数：13
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