Mechanical APDL Structural Analysis Guide

8.6.6.2. Reviewing Results in POST1.

1. Verify from your output file (Jobname.OUT) whether or not the analysis converged at all load steps.
   
   
   • If not, you probably do not want to postprocess the results, other than to determine why convergence
     failed.
   
   
   • If your solution converged, then continue postprocessing.
   
   
   
   


2. Enter POST1. If your model is not currently in the database, issue RESUME.
   Command(s):/POST1
   GUI: Main Menu> General Postproc


3. Read in results for the desired load step and substep, which can be identified by load step and substep
   numbers or by time.
   Command(s):SET
   GUI: Main Menu> General Postproc> Read Results> load step

You can also use the SUBSET or APPEND commands to read in or merge results data for selected

portions of the model only. The LIST argument on any of these commands lists the available

solutions on the results file. You can also limit the amount of data written from the results file to

the database through the INRES command. Additionally, you can use the ETABLE command to

store result items for selected elements. See the individual command descriptions in the Command

Reference for more information.

Caution

If you specify a TIME value for which no results are available, the program performs a

linear interpolation to calculate the results at that value of TIME. Realize that this interpol-

ation usually causes some loss of accuracy in a nonlinear analysis (see Figure 8.14: Linear

Interpolation of Nonlinear Results Can Introduce Some Error (p. 252)). Therefore, for a

nonlinear analysis, you should usually postprocess at a TIME that corresponds exactly to

the desired substep.

Figure 8.14: Linear Interpolation of Nonlinear Results Can Introduce Some Error

Results Errorintroducedduetolinear

interpolationofresults

Resultsrequestedforatimethatdoes

notcorrespondtoasolvedsubstep

Time

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Nonlinear Structural Analysis