- Nodal stresses from Jobname.RST
- Stresses at a cross-section
CautionThe program never assumes that a "zero" stress condition exists. If zero stress is one of the condi-
tions to be considered, it must be explicitly input for each event in which it may occur.The following command sequences schematically illustrat e how to store stresses. In some situations,
you might prefer to use LCASE instead of SET.
Manually stored stresses: FS
Nodal stresses retrieved from Job- SET, FSNODE
name.RST:
Stresses at a cross-section: PATH, PPATH, SET, FSSECT
(Cross-section calculations also require data from Jobname.RST.)You can use more than one method of storing stresses in an event. Each of these methods is explained
in detail below.
14.3.3.1.1. Manually Stored Stresses
You can use this option to store stresses and the temperature, and the time "manually" (without direct
access to the results file Jobname.RST). In such cases, you are not using the fatigue module in POST1
as a postprocessor, but simply as a fatigue calculator. Line elements, such as beams,must be handled
in this way since the fatigue module is not able to access data from a results file other than for solid
elements or shell elements.
Command(s):FS
GUI: Main Menu> General Postproc> Fatigue> Store Stresses> Specified Val
Command input for this option is demonstrat ed by the following example:
FS,201,1,2,1,-2.0,21.6,15.2,4.5,0.0,0.0
FS,201,1,2,7,450.3In this example, only the total stresses (items 1-6) and the temperature (item 7) are input. If the linearized
stresses were also to be input, they would follow the temperatures as items 8 through 13.Time would
be input at item 14.
NoteTime is not used in the fatigue calculation and is only included for reference purposes.NoteIn the special case of a beam element having only axial stress, you would input only one
stress component (SX), leaving the rest of the stress fields blank.Release 15.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential informationEvaluating Fatigue