An estimation of fatigue damage derived from buckling deformation is one of the important factor to evaluate a safety margin of seismic design criteria for thin walled fast breeder reactor components, in addition to estimate the critical buckling strength itself. Post-buckling waves obtained by seismic response analyses of SDOF ( Single Degree of Freedom ) models were analyzed as displacement range-frequency histogram. Cyclic post buckling fatigue tests were performed with 304 S.S cylinders to obtain basic fracture data and to simulate the seismic response characteristic with the static approach. Fatigue damage estimation methods were discussed with the correlation to the maximum global displacement response.
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