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.　Copyright:　©　2015　Editorial　Board　of　CHINAWELDING.