An Ansys-based FSW Component For Age Forming Simulation And Springback Research

The aluminium alloys integral panels used for the structure of aircrafts, instead of the riveting assembling structure, is very extensive to balance the light of quality problems. The integral wallboards are more significant parts of large-airplane components. The traditional integral panels are manufactured by milling processes and control those forming quality of springback parts using manual beating manners, which exist tht great difficulties on the springback constraints and the poor quality defects in the forming process of aluminum alloy sheets. The creep age forming technology applied to forming panel obtaines a great effect on the improving their forming quality.In terms of their shapes or structhres, many integral panels are complex gradually at present. In order to improve the structure efficiency of the integral panels, the friction stir welding which is a new forming technology, depended on the constraint of welding parameters to improve the connection quality. It not only reduces the material waste caused by milling, but also is a kind of manufacturing method of high efficient and low cost. Therefore, it is very important and meaningful for in-depth development on the CAF processing of integral plates based on the friction stir welding to provide a new, low cost manufacturing method.In this paper, it mainly studies the creep constitutive model of2A12aluminium alloy sheets by single creep tensile experiment of css-3905. The digital simulation results on ANSYS have shown that it is consistent with the experimental results after establishing the analysis model and the chosen constitutive equation can accurately describe the creep aging process of metal sheets. The phenomenon of accelerated creep and softening reversion are obviously in the creep age forming process, and the increase of the stress during cyclic creep not only affects in subsequent cycles but also be nore obvious in creep phenomenon. Lastly, the digital calculation results are close to the creep tensile experimental results, it reveals that the established constitutive equation in the paper can exactly describe the behavior of welding integral panels between the stress and the strain.At the same time, the importantance of this paper is aimed to design the numerical algorithm and fortran programs based on ANSYS environment after determining the creep model, then the analysis model of non-welding plates and welding panels are established and analysed. In the creep age forming process of the welding panels, the effect of welding panels forming quality among the creep time, age temperature and die radius are analysed.In addition, in order to verify the reliability of springback quality of the welding panels in creep age forming forming, the frock chucking and stirring head of T-type are devised and fabricated for the plates-ribbed, then the specimens of welding integral panel are obtained by FSW. Meanwhile, after the welding panels are placed in the vacuum autoclave to form under the different aging conditions, the phenomenons show that the springback results of digital simulation coincide with the experimental results in creep age forming process. It is greatly value for engineering application because of the higher forming quality.