Fatigue tests for typical welded joints of aluminum alloy
In order to provide a reasonable assessment for the fatigue strength of ship hull structures built up by alumin-um alloy,typical welded joints of 5083 aluminum alloy ship structures are designed,and fatigue tests are performed on the two kinds of specimens,standard specimens and full-scale specimens respectively.Based on the fatigue test outcomes of the standard specimens,representative P-S-N curves are established specifically for longitudinal weld joints.A comparative ana-lysis is then undertaken against the International Institute of Welding(ⅡW)standard,revealing a marginal 4.32％disparity between the experimental and standard curve fatigue life predictions.Furthermore,the fatigue test results obtained from full-scale specimens served as a crucial validation tool,substantiating the rationality of the chosen standard curve.This valida-tion process contributes valuable insights to the assessment of fatigue strength in aluminum alloy ship structures within the broader scope of structural integrity analysis.
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