Simulation on the deformation controlling of T-joint LBW with auxiliary heat source for high strength aluminum alloy

To avoid the angular deformation of aluminum alloy T-joint weldments,a new method named welding with auxiliary heat source is proposed.The welding simulation is performed with the commercial finite element software Abaqus and FORTRAN programme encoding a special conical heat source with Gaussian volumetric distribution of flux.The influence of the local model on the temperature,residual stress,and welding deformation distributions is investigated.The findings show that angular deformation achieved through numerical computation completely consists with the experimental result which has proved the effectiveness of the finite element methods developed.Various measurements performed on small-scale welded test specimens provide a data base of experimental results that serves as a bench mark for qualification of the simulation result.Finally,the residual stress and strain states in a T-joint are predicted.