Abstract
Damage accumulation is a well known concept in multiaxial fatigue but the achievement of damage quantification and associate it to fatigue life estimation is still a big challenge. The aim of this work is to study the damage accumulation generated in 42CrMo4 steel due to different sequential biaxial loadings. It was implemented several loading paths with the same final history but with different trajectories. The loading paths were carried out with a biaxial servo-hydraulic fatigue machine, and for each specimen the crack initiation angle was measured. The number of cycles at failure and the crack angles were correlated with two theoretical critical plane models. The obtained results are discussed and allow to improve the understanding of fatigue damage accumulation.
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