706 円孔板のクリープ疲労試験におけるき裂進展計測(材料強度と構造設計,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. 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. And cracks grow up at both sides around the hole, but the growth of each crack may not be symmetric.