I have completed a simulation study of a flange. And its coming safe under the applied load. I have used 2 type of bolt 1-1/4 inch UNS 7 & M20 bolt .Now i just want to check the FOS for the 2 different type of bolt under pretension. From the result plot of Pin/Bolt check I am getting the FOS for 1-1/4inch unS 7 bolts, but does not getting any results for M20 bolts. Can any one let me know how to find out the FOS for the M20 bolts?
Attach is a picture for reference.