Select to include the WRC 107 Appendix B stress concentration factors (Kn and Kb) in a fatigue analysis. This option should only be used if you are performing a fatigue analysis. Check ASME VIII Div.2 paragraph AD-160 to see if the fatigue effect needs to be considered. Kn and Kb are used for estimating the peak stress intensity due to external loads.
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Peak stress intensity due to internal pressure is included in the analysis by selecting Include Pressure Stress Indices per Div. 2?.
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For normal (elastic) analysis, do not select this option or Include Pressure Stress Indices per Div. 2?.
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The software does not perform the complete fatigue analysis of Section VIII Div.2 Appendix 4 and 5 rules. Instead, the value of peak stress intensity is reported for fatigue effect comparison.