Limit Load for Thick-Walled Cylinder with Circumferential Cracks under Combined Mechanical Loads

Limit load solutions for thick-walled cylinders with circumferential cracks under combined internal pressure,axial tension and global bending loads were developed via the Mises yield criterion which according to the neutral axis supposition,and both hoop stress and radial stress in constance.These solutions were compared with the results of ideal-elastic-plastic finite element analysis of various typical models.The results show that the predictions using developed solutions are close to the finite element results with certain conservative.The σθ and σr are proposed in limit load analysis for thick-walled cylinder with circumferential crack when 1.32≤k≤2.00.