リブ十字隅肉溶接継手の塩水中での疲れ試験と寿命解析
1988 年 1988 巻 398 号 p. 377-384
詳細
1988 年 1988 巻 398 号 p. 377-384
Fatigue crack growth rates of SM50A, SM58, and HT80 steels in air and in 3% salt water were measured. Crack growth rates in salt water were 1 to 1.5 times faster than that in air, when subjected to loading speed of 1Hz. Bending fatigue tests were also carried out for non-load carrying fillet welded specimens. Fatigue cracks were initiated at weld toes and propagated in semi-elliptical shape. Fatigue life in salt water seemed to be about one quarter of that in air, despite of a few failed data in air. Fatigue crack propagation life of stiffener detail was estimated using fracture mechanics technique and the analytical results were in good agreement with the test data.
