![]() The computation of the stress-intensity factors employs a linear-elastic interaction integral approach. A simple plate model verifies the mesh-tying procedure in computing the linear-elastic stress-intensity factors for two remote loading conditions. The finite-element model incorporates a very detailed, local crack-front mesh in a global continuous mesh through a mesh-tying procedure, which ensures displacement continuity between the independent master surface and the dependent slave surface. The surface-breaking crack considered in this study locates at the interface between the rack plate and the weld metal joining the half CHS, and represents an initial flaw introduced by lack of penetration in the welding procedure. ![]() The primary (chord) member of the V-joint consists of two half CHSs welded to both sides of a thick rack plate, while the secondary (brace) member adopts thick-walled CHSs. This study investigates the fatigue crack-driving force, measured by the linear-elastic stress-intensity factors (SIFs), for a surface crack at the root of the welds in a thick-walled, circular hollow section (CHS) V-shape joint, typically installed in modern offshore jack-up platforms.
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