ENGINEERING APPROACH TO DETERMINATION OF STRESS INTENSITY FACTOR AND PARAMETERS OF GROWTH OF AXIAL CRACK IN CIRCUMFERENTIAL WELD OF PIPELINE

摘要

The problem of evaluation of stress intensity factors in the zone of residual welding stresses was considered. The joint application of the software packages Ansys Workbench and Abaqus/CAE and the compiler Python for accurate determination of parameters of crack resistance of pressure pipelines and vessels was proposed. On the example of the pipe specimen 133x13 mm, the simulation of welding process and subsequent opening of semi-elliptic crack in the zone of residual stresses was carried out. The analysis of the possible further growth of defect from the action of cyclic loads in the weld region was performed and the most dangerous zones of location of axial cracks were found. 6 Ref., 5 Figures.