Effect of Welding Parameters on Stress Distribution of Weld-Bonded Joints

In the weld-through technique of weld-bonding process, adhesive usually suffers extremely high temperature, causing damage to adhesive and consequently the joint strength. The present work studied the effect of welding parameters on the stress distribution of weld-bonded joints under tensile loading. The adhesive properties at elevated temperatures were first presented based on the experiments. Then a finite element model was developed to predict the temperature distribution of weld-bonded joint in the welding process. Effect of welding parameters on the dimensions of weld nugget and adhesive failure zone was obtained. At last, the stress distribution of weld-bonded joint under tensile loading was studied through finite element method. It has been found that both the stress near the adhesive failure zone and the maximum stress of weld nugget decrease when the welding current increases.