Strength mismatch effect on yield load in X-shaped weldment with centre crackKozak, Dražan (Avtor) Gubeljak, Nenad (Avtor) Predan, Jožef (Avtor) Matejiček, Franjo (Avtor) fracture mechanicsX-shaped welded jointscentre crackstrength mismatchingplastic yield loadconstraint effectsThis paper provides yield load solutions for single edged fracture toughness specimen subjected to bending SE (B) with present X-shaped weld joint. The weld centre crack is located in the overmatch weld part. The corresponding fully plastic yield loads were obtained directly by plain strain FEM analysis for five characteristic a/W ratios: 0,1;0,2;0,3;0,4 and 0,5. Also, the influence of the sistematically varied weld root width 2H on the fracture behaviour has been evaluated. It was found that yield load decreases with the increasing weld root, because the undermatched region ahead the crack tip plays the dominant role.20042012-06-01 11:37:41Neznano27547sl