Sahil Sura
Ansys Employee

Hello Amith_Anoop_Kumar,
Please find the following references which are helpful in calculating and understanding the stress intensity factor-
Chapter 8: Stress-Intensity Factors (SIFS) Calculation via Displacement Extrapolation (
2.4. Fracture-Parameter Calculation Types (
Chapter 16: Evaluation of Mixed-Mode Stress Intensity Factors and T-stress for 3-D Surface Flaws (
Hope this helps!