Computational Model of Initiation of Fatigue Cracks Near Hydrogenated Notches
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By using the energy approach of fracture mechanics, we develop a computational model of initiation of a fatigue microcrack near the tip of a notch in a hydrogenated material. The influence of hydrogen on the fracture process is modeled by the decrease in the critical strain in the material according to a linear law. We deduce a relation for the period of initiation of fatigue microcracks near the hydrogenated notch tip. The numerical results are satisfactorily agreement with the available experimental data.
KeywordsHydrogen Experimental Data Fatigue Structural Material Fatigue Crack
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