1133 Ti-6Al-4Vの非比例多軸負荷における疲労き裂進展挙動(OS11-8 材料の疲労挙動と損傷評価-多軸,ねじり,切欠き-)

概要

論文の詳細を見る
This paper focused on fatigue crack propagation behavior of Ti-6A1-4V under multiaxial non-proportional loading at 90-degrees out-of-phase. The fatigue lives on Mises strain under the non-proportional loading were approximately 1/10 of those of the proportional one. Observation on specimen surface showed that the crack initiation lives defined as the length 2a of 30jim did not differ significantly, but that the fatigue crack for the non-proportional one propagated faster. This is because that the fatigue crack under the non-proportional loading is subjected to severe stress field. Thus, the significant reduction shown in fatigue life under non-proportional loading is caused by the accelerated crack growth due to higher stress intensity factor.
2010-10-09