701 変位制御型の円孔板のクリープ疲労におけるき裂発生評価(OS10-(1) 発電機器の材料・構造解析と評価,オーガナイズドセッション)

抄録

This study measured the crack growth in perforated plate of SUS304 stainless steel by a creep fatigue test as a clue to evaluate the creep fatigue characteristic that a structure member is under the elevated temperature. The trapezoidal wave having tensile hold time at peak strain is assumed. It was measured that the crack length by using photographs which were photographed with the CCD video camera at a constant frequency. From the measurement, it is found that the total crack growth rate of a creep fatigue increases sharply with the passage of time or the growth of cracks. This study investigates the effects of prediction method of Stress Redistribution Locus (SRL) method in creep relaxation process.