Daniel Shaw
Ansys Employee


I am not sure that I completely understand your question.  S-N curves in Engineering data can be defined using either mean stress, r-ratio, or temperature as the field variable.  After selecting the field variable, you can create a S-N curve associated with values for that field variable.  You select a cell in the field variable table (just mouse click on that cell), enter a value (e.g., -1 for r-ratio), and then enter the S-N data for that field variable.  To enter data for another field variable value, just select the blank cell at the bottom of the field variable table and enter a 2nd field variable value, and then enter the S-N data for that 2nd field variable value.  You can repeat these steps to create S-N tables for multiple field variable values.