A new multiaxial fatigue criterion is introduced. In combination with the hot spot stress method, it is used to estimate the fatigue life of about 250 test specimens published in international open literature, through which the accuracy of the new method is verified. Finally we use the new method to do a successful fatigue life assessment of the pile leg joint. This research provides an available reference to improve the accuracy of the fatigue life prediction of pile leg joint.
Susmel L.Modified Wöhler curve method, theory of critical distances and Eurocode 3: a novel engineering procedure to predict the lifetime of steel welded joints subjected to both uniaxial and multiaxial fatigue loading[J]. International Journal of Fatigue, 2008, 30(5): 888.
Yousefi F, Witt M, Zenner H.Fatigue strength of welded joints under multiaxial loading: experiments and calculations[J]. Fatigue & Fracture of Engineering Materials & Structures, 2001, 24(5): 339.
Jen Y M, Chang L Y, Fang C F.Assessing the fatigue life of butt-welded joints under oblique loading by using local approaches[J]. International Journal of Fatigue, 2008, 30(4): 603.
Bäckström M, Siljander A, Kuitunen R.Multiaxial fatigue experiments of square hollow section tube-to-plate welded joints[C]. Welded High-Strength Steel Structures, 1997: 163.
Sonsino C M.Multiaxial fatigue of welded joints under in-phase and out-of-phase local strains and stresses[J]. International Journal of Fatigue, 1995, 17(1): 55.
Sonsino C M, Kueppers M.Multiaxial fatigue of welded joints under constant and variable amplitude loadings[J]. Fatigue & Fracture of Engineering Materials & Structures, 2001, 24(5): 309.
Siljander A, Kurath P, Lawrence F V.Non-proportional fatigue of welded structures[C]. Advances in Fatigue Lifetime Predictive Techniques, ASTM STP, 1992, 1122: 319.
Razmjoo G R.Fatigue of load-carrying fillet welded joints under multiaxial loading[C]. Fatigue: Core Research from TWI, 2000: 63.