This presentation demonstrates how to use finite element analysis (FEA) results to develop stress intensification factors (SIFs) and flexibility factors (k’s) for piping components. Basis SIFs are found in fatigue tests, and then equations are developed to extend the tested SIFs to wider ranges of geometries and materials. The original SIFs were developed by Markl in the 1950s before FEA was established as a practical tool. Additional testing and extensive comparisons with finite element data by Rodabaugh and Wais (EPRI 110996) and Paulin (ASME ST LLC 07-02) have resulted in relatively standard procedures that can be used to produce confident SIFs and flexibility factors for use in pipe stress programs.
Part 2 of the powerpoint