I/O Options and Subcase Information Entry Used to request fatigue factor of safety, hydrostatic pressure, and microscopic shear stress output for grid-based FATDEF for all subcases or individual subcases, respectively.


GPFOS (format, type, option) = option


Argument Options Description
format <H3D, OPTI, blank>
Results are output in Hyper3D format (.h3d file).
Results are output in OptiStruct results format (.gpf file).
blank (Default)
type <SUB, EVENT, blank>
SUB (Default)
Only the total grid point factor of safety results from the grid-based FATDEF fatigue subcase is output.
Grid point Factor of Safety from each FATEVNT and total Grid point Factor of Safety for grid-based FATDEF Fatigue subcases are output.
option <HISTORY, blank> Factor of Safety, Hydrostatic Pressure, and Microscopic Shear Stress results are output as a function of time for Fatigue subcases.
Currently only supported for type=EVENT.
blank (Default)
option1 <YES, ALL, NO, NONE, SID, PSID>

Default = ALL

YES, ALL, blank
Results are output for all elements.
Results are not output.
If a set ID is provided, results are output only for elements listed in that set.
If a property set ID is provided, results are output only for elements referenced by the corresponding set of properties (SET (TYPE=ELEM, SUBTYPE=PROP)).


  1. When a FOS command is not present, fatigue FOS results are not output.
  2. GPFOS output is available for fatigue subcases wherein the FATDEF entry references grid-based identification of fatigue domain.
  3. Multiple formats are allowed on the same entry; these should be comma separated. If no format is specified, then this output control applies to all formats defined by OUTPUT or FORMAT commands for which the result is available. See Results Output by OptiStruct for information on which results are available in which formats.
  4. Multiple instances of this card are allowed. If instances are conflicting, the last instance dominates.