Data for 3D Finite Element Analysis of Fatigue Crack Growth in Modified Compact Tension Specimen: Role of Secondary Hole Position

Constant amplitude loading was applied, diverging from the variable loading protocols utilized in previous research. Although crack growth trends were consistent with earlier findings, the constant amplitude resulted in a distinct exponential surge in the a−N curves as failure approached.

Numerical validation was confirmed through similar (a/W) vs. f(a/W) curves, normalized SIF trends, and rigorous mesh independence checks. The study then introduced a secondary hole at eight strategic locations to evaluate its impact on trajectory. It was observed that minor geometric modifications significantly influenced the crack's path.