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- W3155403364 abstract "A loading sequence effect on fatigue life was investigated for piping under seismic loading. A fatigue assessment method which can consider the loading sequence effect conservatively was proposed using the effective strain range. Variable strains in the pipe wall were obtained by finite element analyses. A seismic loading was applied to a system of pipes in the analysis. Fatigue tests were conducted using strains obtained by the analysis. Damage factors at failure calculated by Miner’s rule were less than 1.0 and the minimum value was 0.43. It implies that Miner’s rule predicted non-conservative fatigue life. Crack growth tests were also conducted to examine the reduction of the fatigue life. It was shown that a single overload strain decreased crack opening strain and increased the effective strain range. The increment of the effective strain range accelerated the crack growth rate after the overload and reduced the fatigue life. The damage factor for the strain under seismic loading was recalculated using Miner’s rule and the strain ranges which added the maximum increment of the effective strain range. The recalculated damage factors were larger than 1.0 under most conditions. The proposed procedure is available to predict the fatigue life of piping under seismic loading." @default.
- W3155403364 created "2021-04-26" @default.
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- W3155403364 date "2021-01-01" @default.
- W3155403364 modified "2023-10-05" @default.
- W3155403364 title "Proposal of fatigue assessment method for piping under seismic loading (About the use of effective strain range for loading sequence effect)" @default.
- W3155403364 doi "https://doi.org/10.1299/transjsme.21-00025" @default.
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