Computation of SIFs for Cracks in Cold-Worked Holes

Abstract: Reliable prediction of crack growth and residual strength in metallic structures require accurate computation of SIFs. Since analytical solutions for complex configurations are not available, estimates of SIFs have to be obtained by numerical methods such as the FEM. The particular case of cracks emanating from cold worked holes is of practical importance. To account for residual stresses in the computation of SIFs, two approaches were investigated:

• modified J-integral with the J → K conversion
• contour integral method for loaded cracks (CIM-LC)