Mechanical APDL Structural Analysis Guide

Input by means of FSSECT is demonstrat ed in the following example. If node locations are not assigned
with an FL command, the FSSECT commands in this example will automatically assign location numbers
to the two path nodes, 391 and 395. (See Figure 14.3: Surface Nodes are Identified by PPATH Prior to
Executing FSSECT (p. 429).)

PATH,Name,2! Define the path using the two surface nodes

PPATH,1,391

PPATH,2,395

SET,1

FSSECT,,1,1! Store stresses at nodes 391 and 395

Figure 14.3: Surface Nodes are Identified by PPATH Prior to Executing FSSECT

14.3.3.2. Listing, Plotting, or Deleting Stored Stresses

Use the following options to list, plot, or delete stored stresses.

• List the stored stresses per location, per event, per loading, or per stress condition:
  Command(s):FSLIST
  GUI: Main Menu> General Postproc> Fatigue> Store Stresses> List Stresses


• Display a stress item as a function of loading number for a particular location and event:
  Command(s):FSPLOT
  GUI: Main Menu> General Postproc> Fatigue> Store Stresses> Plot Stresses


• Delete a stress condition stored for a particular location, event, and loading:
  Command(s):FSDELE
  GUI: Main Menu> General Postproc> Fatigue> Store Stresses> Dele Stresses


• Delete all stresses at a particular location:
  Command(s):FL
  GUI: Main Menu> General Postproc> Fatigue> Stress Locations


• Delete all stresses for all loadings in a particular event:
  Command(s):FE
  GUI: Main Menu> General Postproc> Fatigue> Erase Event Data

14.3.3.3. Assigning Event Repetitions and Scale Factors

This option assigns the number of occurrences to the event numbers (for all loadings at all locations
of the event). It can also be used to apply scale factors to all of the stresses that make up its loadings.
Command(s):FE
GUI: Main Menu> General Postproc> Fatigue> Assign Events

An example of this command usage is given below:

FE,1,-1! Erase all parameters and fatigue stresses formerly

! used for event 1.

FE,2,100,1.2! Assign 100 occurrences to events 2, 3 and 4,

*REPEAT,3,1! and scale by 1.2.

FE,5,500! Assign 500 occurrences to event 5.

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Evaluating Fatigue