Crack-tip constraint analysis of cylinder structure with axial penetrating crack at outside surface

A higher-order asymptotic J-A_2C-C solution, which is suitable for studying cylinder structure with a penetrating crack at outside surface, was proposed by investigating the J-A₂ two-parameter method. For cylinder structure with different crack sizes at the outside surface, the methods of FEA, HRR theory, the J-A₂ theory and the J-A_2C-C method were adopted to calculate the opening stress at crack tip, and comparative analysis by using different methods was made in this paper. The influences of different crack sizes and load values on computational accuracy by using the J-A_2C-C method were studied. It can be found that the opening stress obtained by the J-A_2C-C method can match well with the FEA numerical results, and the J-A_2C-C method can be used to study the crack-tip constraint from small-scale yield condition to large-scale yield condition.