Fatigue performance of tubular X-joints: Numerical investigation

Nguyen Chien Thang, Qian Xudong, Ton That Hoang Lan


The cyclic actions due to waves, currents and winds on offshore platforms frequently cause fatigue cracks at hot-spot locations. The remaining fatigue life of such connections depends significantly on the fatigue driving force often measured by the stress-intensity factors. This study examines the fatigue performance of tubular joints fabricated using a new type of enhanced partial joint penetration weld details under constant-amplitude brace in-plane bending actions. The numerical study ascertains the crack propagation angle, the crack-front profile and the interaction between adjacent cracks on the stress-intensity factors.


Fatigue; tubular X-joints; crack propagation; SIF; finite element model

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DOI: https://doi.org/10.15625/0866-7136/35/1/2896 Display counter: Abstract : 212 views. PDF : 94 views.


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