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http://dx.doi.org/10.3744/SNAK.2010.47.4.565

A Comparative Study on the Crack Propagation Characteristics According to the Pre-Notch Shapes of Fatigue Indicator Sensor  

Kim, Jae-Hyun (Department of Naval Architecture and Ocean Engineering, Inha University)
Kim, Seul-Ki (Department of Naval Architecture and Ocean Engineering, Inha University)
Cho, Young-Gun (Department of Naval Architecture and Ocean Engineering, Inha University)
Yeo, Seung-Hoon (Department of Naval Architecture and Ocean Engineering, Inha University)
Kim, Kyung-Su (Department of Naval Architecture and Ocean Engineering, Inha University)
Kim, Sung-Chan (Department of Ship and Ocean System, Inha Technical College)
Lee, Jang-Hyun (Department of Naval Architecture and Ocean Engineering, Inha University)
Publication Information
Journal of the Society of Naval Architects of Korea / v.47, no.4, 2010 , pp. 565-572 More about this Journal
Abstract
It is difficult to predict the accurate fatigue life of the ship structure because of load uncertainty and load redistribution at the ship structure members. As one of studies for accurate evaluation and prediction of fatigue life, it is a promising way to detect the crack previously by attaching the Fatigue Indicator Sensor (FIS) at the crack prediction region. In order to predict the fatigue life of the ship structure by using FIS, it is required to know previously the crack propagation characteristics according to pre-notch shapes. In this study, we obtained the stress distribution phase, stress concentration factors and stress intensity factor of various pre-notch shapes through FEA. Additionally, we conducted the fatigue test and obtained the characteristics of crack propagation according to the pre-notch shapes through comparison between the fatigue test and the FEA. Consequently, we classified the pre-notch shape into 3 categories: Long, Medium, and Short life type. On the basis of the numerical and experimental results, the FIS can be developed.
Keywords
Fatigue indicator sensor(FIS); Fatigue life; Stress concentration factor; Stress intensity factor; Characteristics of crack propagation;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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