Abstract
The coplanar double lap-joint is the weld type mainly used for the connection of skin and stringer. The welding deformation in the component will reduce fabrication accuracy and bearing capacity and the excessive welding deformation can even render the product unusable. In the present work, a thermal-elastic-plastic finite element model is developed to investigate the characteristics of welding deformation in the coplanar double lap-joint. The experiment is carried out to verify the accuracy of simulated results. The results of the simulation shows a good agreement with the experimental measurements. The influence of welding direction on welding deformation is studied by finite element analysis. Moreover the mechanism of deformation mode in the coplanar double lap-joint is discussed. The results show that the change of welding direction has different effects on the distribution of residual deformation. Through the analysis of simulation results, the deformation mode of the joint is similar to a concave-convex mode.
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