Author(s)

S.T. Lie, S. Lan & C.M. Bian

Abstract

In order to obtain accurate boundary stresses near the weld toe of fillet welds, a very fine mesh is required in boundary element analysis because these stresses are evaluated based on the shape functions derivatives and the Hooke's law. In this study, hypersingular boundary integral equation (HBIE), combined with multi-zone technique and traction singular quarter-point element, is implemented to evaluate the boundary stress components at the weld toes and also near the crack tips. The boundary stresses near the crack tip are then used to calculate stress intensity factors by stress extrapolation method. Numerical results are presented for an edge cracked plate and the stress intensity factors estimated by other methods are compared. Finally, the boundary stresses and stre

Keywords