A review of multiaxial fatigue of weldments: experimental results, design code and critical plane approaches

A survey of biaxial (bending or tension and torsion) constant amplitude fatigue of welded connections is presented. Re-analysis of 233 experimental results from eight different studies has been performed based on hot spot stresses and three potential damage parameters: maximum principal stress range; maximum shear stress range; and a modified critical plane model for welds. Of the three methods, the critical plane model was most successful in resolving the data to a single S–N line. The design curve for all toe failures based on the critical plane model was FAT 97 with a slope of 3. By excluding butt welds and including only fillet welds that failed at the weld toe, the design curve was increased to FAT 114 with a slope of 3. However, observed scatter was 70–100% larger than that observed in uniaxial loaded specimens analysed using the hot spot approach.

[1]  K. J. Miller,et al.  A Theory for Fatigue Failure under Multiaxial Stress-Strain Conditions , 1973 .

[2]  A. Burrows.  Fatigue of welded constructions: Brighton, UK, 7–9 April 1987 , 1987 .

[3]  Fv Lawrence,et al.  Nonproportional Fatigue of Welded Structures , 1992 .

[4]  A. F. Hobbacher,et al.  Fatigue design of welded joints and components , 1996 .

[5]  D. Socie.  Critical Plane Approaches for Multiaxial Fatigue Damage Assessment , 1993 .

[6]  R. Lin Peng,et al.  Welding and tig-dressing induced residual stresses- relaxation and influence on fatigue strength of spectrum loaded weldments , 1999 .

[7]  K. Ida,et al.  STRESS CONCENTRATION FACTOR FORMULAE WIDELY USED IN JAPAN , 1996 .

[8]  Erkki Niemi,et al.  Stress determination for fatigue analysis of welded components , 1995 .

[9]  A W Beeby,et al.  CONCISE EUROCODE FOR THE DESIGN OF CONCRETE BUILDINGS. BASED ON BSI PUBLICATION DD ENV 1992-1-1: 1992. EUROCODE 2: DESIGN OF CONCRETE STRUCTURES. PART 1: GENERAL RULES AND RULES FOR BUILDINGS , 1993 .

[10]  H. P. Eichenberger.  Discussion: “The Skewed Boundary Layer” (Taylor, Edward S., 1959, ASME J. Basic Eng., 81, pp. 297–300) , 1959 .

[11]  C. M. Sonsino,et al.  Multiaxial fatigue of welded joints under in-phase and out-of-phase local strains and stresses , 1995 .

[12]  Ohta Akihiko,et al.  Fatigue strength of non-load-carrying cruciform welded joints by a test maintaining maximum stress at yield strength , 1994 .

[13]  T. Partanen,et al.  Hot spot stress approach to fatigue strength analysis of welded components : Fatigue test data for steel plate thicknesses up to 10 mm , 1996 .