Study on Mixity Angle of the Welded Joint with Cracks Located at the Fusion Line
Considering the stress-strain field distribution rules of welded joints containing single-edge crack on fusion line, the fracture parameter COD is decomposed into two parts of mode I and Mode II. By using the finite element method, the relationship between mixity angle and width of welded seam of welded joints containing single-edge crack on the fusion line was studied under the different load levers. Moveover, the relationship between mixity angle and the strain hardening exponent of welded seam was also studied. The results show that the effect of the width and strain hardening exponent of welded seam and strength matching on mixity angle is evident. And the effect of strength matching on mixity angle is more significant than that of width. In addition, the change tendency of mixity angles of Overmatched and undermatched welded joint is reversed. The value of mixity angles becomes smaller with increasing strain hardening exponent at the same load level.