Mixed Mode Stress Intensity Factor Solutions for Offshore Structual Tubular Joints by Three Dimensional Finite Element Analysis

  • H. Chong Rhee
  • Mamdouh M. Salama
Conference paper


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.


Stress Intensity Factor Crack Surface Fatigue Crack Growth Crack Front Tubular Joint 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Pan, R. B., and Plummer, B., “A Fracture Mechanics Approach to Nonoverlapping Tubualr K-Joint Fatigue Life Prediction,” OTC 2645, Offshore Technology Conference, Houston, Texas, 1976.Google Scholar
  2. 2.
    Barsoum, R. S., “On the Use of Isoparametric Finite-Elements in Linear Fracture Mechanics,” Int. J. Num. Meth. Engng., 10, 1976.Google Scholar
  3. 3.
    Sih, G. C., and Liebowitz, H., “Mathematical Theory of Brittle Fracture, Fracture, An Advanced Treatise, II,” Academic Press, 1968.Google Scholar
  4. 4.
    Ingraffae, A. R., and Manu, C., “Stress-Intensity Factor Computation in Three Dimensions With Quarter-point Elements,” Int. J. Num. Meth. Engng., 15, 1980.Google Scholar
  5. 5.
    PRETUBE, Finite-Element Preprocessor for Tubular Joint, User’s Manual, RN 83–6143, Veritec, Oslo, Norway, October 1985.Google Scholar
  6. 6.
    TUSTRA, “Tubular Joint Structural Analysis Module,” Users Manual, The Otter Group/Sintef, November 1983.Google Scholar
  7. 7.
    Broek, D., and Rice, R. C., “Fatigue Crack Growth Properties of Rail Steels,” DOT-TSC-1076, Final Report, Battelle Columbus Laboratories, July 1977.Google Scholar

Copyright information

© Springer Japan 1986

Authors and Affiliations

  • H. Chong Rhee
    • 1
  • Mamdouh M. Salama
    • 1
  1. 1.Conoco Inc.Ponca CityUSA

Personalised recommendations