For developing a simple and practical method for weld root fatigue assessment, the authors have evaluated effective notch stress at weld toes and weld roots using a three cargo hold shell element model of bulk carrier, where very fine solid elements are locally embedded in order to simulate weld details such as root face, root gap, weld leg length and weld height. The authors also have evaluated hot spot stress using a fine shell element model. According to analysis results, it is found that the ratio of the effective notch stress range of a weld root to that of a weld toe does not significantly depend upon either loading conditions (such as homogeneous cargo loading and heavy ballast conditions) or wave conditions, but mainly depends upon the surrounding structural arrangements and member scantlings. Taking advantage of these findings, the authors have developed a simple and practical evaluation method to estimate the fatigue strength of weld roots using a conventional cargo hold shell element model.
Development of Practical Fatigue Strength Evaluation Method for Weld Root Crack
Lecture Notes in Civil Engineering
Practical Design of Ships and Other Floating Structures ; 2019 ; Yokohama, Japan September 22, 2019 - September 26, 2019
2020-10-04
15 pages
Article/Chapter (Book)
Electronic Resource
English
Weld root crack , Weld toe crack , Fatigue strength assessment , Solid FE analysis , Effective notch stress , Hot spot stress Engineering , Offshore Engineering , Structural Materials , Solid Mechanics , Engineering Fluid Dynamics , Building Construction and Design , Fire Science, Hazard Control, Building Safety
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