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http://dx.doi.org/10.21289/KSIC.2022.25.2.141

Comparison of Threshold Stress Intensity Factor and Fatigue Limit for Micro-crack of Offshore Structural Steel F690  

Gu, Kyoung-Hee (Dept. Marine Convergence Design Engineering, Pukyong National University)
Lee, Gum-Hwa (Dept. Marine Convergence Design Engineering, Pukyong National University)
Lee, Weon-Gu (Dept. Materials Science and Engineering, Pukyong National University)
Oh, Chang-Seok (Dept. Materials Science and Engineering, Pukyong National University)
Nam, Ki-Woo (Dept. Marine Convergence Design Engineering, Pukyong National University)
Publication Information
Journal of the Korean Society of Industry Convergence / v.25, no.2_1, 2022 , pp. 141-148 More about this Journal
Abstract
In this paper, the evaluation equations proposed by Tange et al. and Ando et al. were used to evaluate the threshold stress intensity factor ∆KRth(s) and fatigue limit ∆𝜎Rwc, according to the small crack of offshore structural steel F690. Despite the differences in concept and shape of the two equations, the ∆KRth(s) and ∆𝜎Rwc proved completely consistent. It is possible to use these equations to evaluate the dependence of the crack length on the ∆KRth(s) and ∆𝜎Rwc of structures made of all steel grades. With these equations, the characteristics of microcracks can be quantitatively evaluated, and the safety and reliability of the structure can be secured.
Keywords
Equivalent Crack; Fatigue Limit; Micro Crack; Semi-Ellip tical Crack; Threshold Stress Intensity Factor;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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