Mixed Mode Stress Intensity Factor Solutions for Offshore Structual Tubular Joints by Three Dimensional Finite Element Analysis
The stress intensity factor solutions for a surface crack at the weld toe of an X-joint under brace tension and in-plane bending were obtained through three-dimensional finite element analyses. The complex finite element mesh was generated using the advanced mesh generator PRETUPE. The stress intensity factors were obtained from the displacement solutions of the quarter-point crack tip elements in the finite element model. The results of these analyses suggest that, for an offshore tubular joint fracture mechanics problem, the crack tip behavior can be predominantly mixed mode. The results of these analyses demonstrate the validity of the solution scheme and contribute to the understanding of the fracture behavior of tubular joints.
KeywordsStress Intensity Factor Crack Surface Fatigue Crack Growth Crack Front Tubular Joint
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