Abstract
Fatigue and corrosion fatigue tests were conducted for T-welded joint specimens. The test results show that the corrosive environment greatly reduces the fatigue life of the specimens. The average reduction percentage under different stress ranges Δσ were 47.7% (Δσ=172.5MPa), 58% (Δσ=216MPa) and 45.7% (Δσ=258MPa) respectively. Based on Continuum Damage Mechanics (CDM), a corrosion fatigue life prediction model considering the coupling effects of corrosion environment and cyclic load was proposed. This prediction model can predict the corrosion fatigue life of present T-welded joint specimens and other specimens reported in previous researches, showing rationality and versatility.
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