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Analysis of the procedure for identifying potentially dangerous locations of weld joints in thin-walled metal structures during life assessment
Doležel, Daniel ; Pavlík, Ondřej (oponent) ; Vosynek, Petr (vedoucí práce)
The fatigue assessment of welds in thin-walled metal structures is vital for ensuring structural integrity in proposed designs. Despite established criteria and S-N curves, fatigue analysis of welded joints for geometrically complex structures presents inherent challenges. The primary obstacle lies in identifying the fatigue-critical locations for detailed assessment, a task that can be highly time-consuming, even with finite element modeling (FEM). This thesis thoroughly examines weld fatigue assessment, encompassing a review of the relevant literature, commercial solutions, and the practical context of railway industry standards and the FKM Guideline. A significant contribution is the development of automated FEMAP API programs for Siemens FEMAP software, aimed at streamlining the analysis process. These programs reduce time and effort by employing a simplified analysis approach based on local nominal stress assessment, in accordance with the FKM Guideline. The methodology, supported by the developed programs, is described and demonstrated in this thesis. The practical implications of this work extend to providing an efficient alternative to commercial software, ultimately enhancing the efficiency of weld fatigue analysis in structural engineering applications.
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