Due　to　the　huge　property　difference　between　high　strength　structural　(HSS)　steels　and　mild　steels　after　welding,　mechanical　behavior　and　failure　mode　of　fillet　welded　joints　of　HSS　steels　should　be　studied　further.　Numerical　simulations　can　provide　increased　insight　into　this　topic.　This　paper　concerns　finite　element　simulations　of　component　tests　of　two　types　transverse　fillet　welded　joints　of　HSS　steels:　lap-welded　transverse　fillet　welds　and　cruciform　type　transverse　fillet　welds.　In　order　to　investigate　the　influences　of　triaxial　stress　states　on　fracture　ductility　of　weld　metals,　a　series　of　tests　on　specimens　with　various　initial　geometries　are　carried　out.　By　comparing　three　typical　uncoupled　fracture　models　(stress　triaxiality-dependent　ductile　fracture　model　(VGM),　Lode　angle-dependent　ductile　fracture　model　(MSSM)　and　combination　of　stress　triaxiality　and　Lode　angle　ductile　fracture　model　(BWM)),　BWM　gives　precious　prediction　of　ductile　fracture　of　weld　metals.　The　behaviors　in　terms　of　load-displacement　and　failure　modes　of　transverse　fillet　welds　are　all　well　captured　by　the　numerical　simulations　with　calibrated　ductile　fracture　models.　Specifically,　the　location　of　fracture　initiation　and　propagation　of　cracks　obtained　from　simulations　are　both　identical　with　real　responses.