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http://dx.doi.org/10.7842/kigas.2012.16.3.029

A Study on Characteristics of Fatigue Life in LOP Cruciform Fillet Welding Zone  

Lee, Yong-Bok (Dept. of Mechanical & System Design Engineering, Hongik University)
Publication Information
Journal of the Korean Institute of Gas / v.16, no.3, 2012 , pp. 29-34 More about this Journal
Abstract
Investigating safer ways to design and use to prevent a loss of life and property by failure of the structures are necessary and assessing total fatigue life with initiation and propagation of fatigue crack accurately through fatigue analysis is very important. The object of this study is to examine the initial life and propagation life when the fatigue crack is introduced from the root which is likely to appear in LOP(Lack of Penetration) cruciform fillet welded structure including bridges, ships and gas storage facilities which are impossible to be fully penetrated and to measure the rate of fatigue life until the final cleavage failure. As the result, each rate of fatigue life for fatigue failure is somewhat different in the range of 5% according to the thickness of material, however, the overall rate of initial life is in the range of 34~39% and propagation life showed the range of 61~66%.
Keywords
cruciform fillet welding zone; structural failure; LOP(Lack of Penetration); fatigue crack; root failure; the rate of fatigue life; initial life; propagation life;
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  • Reference
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