Accurate Stress Intensity Factor Solutions for Unsymmetric Corner Cracks at a Hole Subject to General Loading

摘要

This report results from a contract tasking The Swedish Defense Research Agency as follows: A basic research program will be conducted to calculate stress intensity factor (K) solutions not only for symmetric but also unsymmetric corner cracks at a hole subject to general loading. The p-version finite element method (FEM) with a mathematical splitting scheme will be used to enable efficient and accurate calculations. All structurally significant crack shapes are to be considered. In addition, combinations of crack depth to crack length (a/c), crack depth to sheet thickness (a/t), and hole radius to sheet thickness (r/t) ratios are to be analyzed at each side of the hole; thus more than 106 solutions are to be developed with control of the error in the computed K solutions. The loading conditions will be remote tension, remote bending, and pin loading (bearing). The new K solutions will be implemented in AFGROW.