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No. 68 (2007/03) >

 
Title :Crack Propagation Behavior in S15C and S35C after Overload
Authors :Purnowidodo, Anindito
Hisai, Takeo
Fukuzato, Shingo
Makabe, Chobin
Authors alternative :真壁, 朝敏
Issue Date :Mar-2007
Abstract :Crack propagation is retarded after applying a tensile overload, and accelerated after applying a compressive overload in fatigue tests under constant base stress amplitude. However, at a negative value of the baseline stress ratio, the fatigue crack propagation rate can accelerate after applying a tensile overload. To evaluate such crack propagation behavior, the effective stress intensity factor range has been employed. The transition of residual fatigue life after applying these loads was observed and this behavior was dependent on the loading conditions. When the applied overload level was lower than a critical level, retardation of crack propagation was observed. However, when the applied overload level was higher than a critical level, the crack growth rate got higher. These phenomena are related to not only residual stress, but also crack opening behavior.
Type Local :紀要論文
ISSN :0389-102X
Publisher :琉球大学工学部
URI :http://hdl.handle.net/20.500.12000/1445
Citation :琉球大学工学部紀要 no.68 p.1 -11
Appears in Collections:No. 68 (2007/03)

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