Analysis of FSW residual stress and deformation of coupler connecting plate based on numerical simulation
In order to explore the residual stress and welding deformation of subway coupler connecting plate after FSW,this paper carried out numerical simulation of 6005A-T6 aluminum alloy coupler connecting plate based on inherent strain method.The FSW test of coupler connecting plate structure was carried out,and the residual stress and deformation were measured by drilling method and measuring sample method respectively.The results were compared with the simulated results.The results showed that the distribution trend of the simulation results was consistent with that of the test results.Compared with the measured values,the maximum error of the finite element analysis results of residual stress was less than 10％,and the maximum deformation error was less than 0.5 mm.Analysis of welding sequence had a great influence on the residual stress and deformation of coupler connecting plate structure after welding.Of the two common welding sequences,A welding sequence(FSW fixation-single external extension plate side FSW-double external extension plate side FSW)was better.
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