Prediction of fracture-based fatigue life of connectors for the mobile offshore base

Abstract A new analytical model for predicting the fatigue life of metals is presented. This model is validated by the published experimental data of most of the major studies for which the material properties — yield strength, fracture toughness, modulus of elasticity and threshold stress intensity factor are known. A new analytical model is also presented for corrosion fatigue in a marine or other aggressive environment. This fatigue model is validated by a limited amount of published experimental data. The first model is used to predict the life of rigid connectors for the mobile offshore base under random loading by wave action from sea states 1–8. Recommendations are made for the design stresses and for selecting the metal to be used for the design of the connectors for fatigue.

[1]  F. Terasaki,et al.  Fractography and Fracture Mechanics , 1980 .

[2]  H. Saunders,et al.  Book Reviews : Fracture and Fatigue Control in Structures - Application of Fracture Mechanics: S.T. Rolfe and J.M. Barsom Prentice-Hall, Inc., Englewood Cliffs, NJ, 1977 , 1979 .

[3]  G. R. Irwin,et al.  Linear fracture mechanics, fracture transition, and fracture control , 1968 .

[4]  V. Weiss,et al.  Mean Stress and Environmental Effects on Near Threshold Fatigue Crack Growth , 1976 .

[5]  M. E. Haddad,et al.  Fatigue Life Predictions of Smooth and Notched Specimens Based on Fracture Mechanics , 1981 .

[6]  Jm Barsom,et al.  Effect of Stress Concentration on Fatigue-Crack Initiation in HY-130 Steel , 1974 .

[7]  S. Rolfe,et al.  Fatigue-crack propagation in high yield-strength steels , 1971 .

[8]  P. C. Paris,et al.  Extensive Study of Low Fatigue Crack Growth Rates in A533 and A508 Steels , 1971 .

[9]  D. S. Dugdale.  Yielding of steel sheets containing slits , 1960 .

[10]  P. C. Paris,et al.  FATIGUE CRACK PROPAGATION GROWTH RATES UNDER A WIDE VARIATION OF DELTA K FOR AN ASTM A517 GRADE F(T-1) STEEL , 1971 .

[11]  F. Erdogan,et al.  Cylindrical and spherical shells with cracks , 1969 .

[12]  M Katcher,et al.  Effects of R-Factor and Crack Closure on Fatigue Crack Growth for Aluminum and Titanium Alloys , 1974 .

[13]  John W. Hutchinson,et al.  Analysis of Closure in Fatigue Crack Growth , 1978 .

[14]  Correlation Between Fatigue Crack Propagation and Low Cycle Fatigue Properties , 1974 .