Abstract: Tests of LC4 aluminum fatigue damage cumulative under / fatigue( 1) + cor rosion+ fat igue( 2)0 mode havebeen car ried out. The test results show that equal level loading tests under the mode have an analogy wit h / lowhigh0 two level loading tests under gener al condit ions. Preceding loading has a for ging effect of low loading on thefatigue behavior of behind loading. Hence, this paper presents a damage cumulat ive hysteretic model. The predictedresults of the damage cumulative hysteretic model and the test results mode ar e in good agreement.

Key words: environment, calendar life, fatigue damage, damage accumulation, corrosion, hysteretic model