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Abstract |
We investigated the difference in fatigue behaviour between the aluminium alloys A5083-O and A5083-H321 because they are used as structural components in ships and high speed craft. We obtained S-N cu...rves for the base materials and the welded joints made of A5083-O. The relationship between the fatigue crack propagation rates and the stress intensity factor ranges ΔK ,ΔK_<eff> and ΔK_<RPG> [1] was determined. Additionally, the evolution of fatigue crack growth for the base materials and the welded joints made of A5083-O was measured. We also carried out numerical simulations of fatigue crack growth for both base metals and their welded joints made of A5083-O. The difference in fatigue crack growth behaviour for each alloy and the validity of the numerical simulations of fatigue crack growth based on the RPG stress criterion [1] in the base materials and their welded joints was investigated.show more
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