1303 CrMoV鋳鋼のクリープ疲労き裂伝ぱ挙動に及ぼす材料特性の影響(G03-1 き裂進展・破面解析,G03 材料力学)

概要

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Precise prediction of the residual life of the components under long-term-service is strongly required from the demand of the maintenance-cost reduction on the thermal power plants. Quantitative prediction of crack growth under the displacement-controlled condition such as thermal fatigue is the key for these needs. In the previous paper, we have proposed a simplified prediction method of the J-integral of some specimens under the displacement-controlled condition, on the basis of the displacement-based approach instead of the reference stress approach. In this paper, creep-fatigue crack growth behavior for a semi-circular notched plate of CrMoV cast steel under displacement-controlled conditions is numerically and experimentally examined. The effect of stress-strain curve used for crack growth simulation on crack growth behavior is also discussed.
一般社団法人日本機械学会の論文
2005-09-18