Study of the Mechanics of Spatial Elastoplastic Strain and Fracture of Weld Joints of Austenite Steels

The results of calculated–experimental and numerical studies of the relative strain intensity factors in the case of semi-elliptical inclined surface cracks in the weld joints of 12Kh18N10T austenite stainless steels with the assumption of redistribution of strain and initial residual stresses under nonlinear boundary loading conditions are presented. A parametric equation for the determination of the relative strain intensity factors in the case of semi-elliptical inclined surface cracks is given. This new parametric equation allows one to evaluate the comparative survivability of the local zones of details and construction in the bulk weld joint upon elastoplastic static and low-cycle loading.