Fatigue performance of tubular X-joints: Numerical investigation

Nguyen Chien Thang, Qian Xudong, Ton That Hoang Lan
Author affiliations

Authors

  • Nguyen Chien Thang Duy Tan University, Da Nang, Vietnam
  • Qian Xudong National University of Singapore, Singapore
  • Ton That Hoang Lan University of Architecture, Ho Chi Minh City, Vietnam

DOI:

https://doi.org/10.15625/0866-7136/35/1/2896

Keywords:

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

Abstract

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. 

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Published

10-04-2013

Issue

Section

Research Article