Post-Processing Generalized Plates Post-Processing Generalized Plates

Structural Post-Processing results for generalized plates are obtained with the command:


     PLATE_POST, TYPE(1), ...., TYPE(i)  -OPTIONS

where TYPE(i) must be chosen from STRESS, LOADS, FATIGUE, or COUNT, and the available options are:


     -CLASS, :CLS_SEL

     -NODE, :NODE_SEL(1), :NODE_SEL(2), :NODE_SEL(3), :NODE_SEL(4)

     -ELEMENT, :ELE_SEL

     -LOAD, :LSEL

     -DURATION, :DURATION_SEL

     -DETAIL

     -STANDARD, L(1), T(1), ..... L(n), T(n)

     -SUMMARY, L(1), T(1), ..... L(n), T(n)

     -REPORT, YES/NO

     -FILE, YES/NO

     -S_BINS, S(1), S(2), ......, S(n)

     -CDR_VONMISES, FLAG

Here, one will only receive results for elements which match the selectors defined with the -CLASS, -NODE, and -ELEMENT options as described previously, and for cases which match :LSEL which is defined with the -LOAD option. For FATIGUE, all durations which match :DURATION_SEL defined via the -DURATION option will be considered. If no values are given for TYPE(i), then results for all TYPEs will be produced.

Here, a TYPE of STRESS will produce the average stress in the element, LOADS will produce the membrane tractions acting on the faces of the element and the average bending stresses, FATIGUE will produce spectral fatigue results, and COUNT will produce the number of cycles of the stresses in "bins". With the exception of COUNT, the extent of the reports which will be produced is controlled by which of the three report types -DETAIL, -STANDARD or -SUMMARY were selected and the report limits. With a -STANDARD ob -SUMMARY report, L(i) and T(i) are used to specify a range of values for which a given report will be printed. The value used for determining the range is the Von Mises stress divided by yield stress except for FATIGUE where the value is the CDR. One can specify as many ranges as he desires, or he can omit all data following the option. If no ranges are specified, one report for all ranges of value will be printed. An option of -STANDARD will result in a report of the results for the maximum unity ratio over all selected load cases for each member selected. If one specifies an option of -SUMMARY, this report will be reduced to the results for only the selected element in each class which has the greatest unity ratio. Finally, if one specifies -DETAIL as an option, the original report will be expanded to include checks of all members for all selected load cases at all load points. Notice that -DETAIL, -STANDARD, and -SUMMARY may all be used on the same command to produce reports of all three types. If no options are specified, then a default of -STANDARD is assumed.

The options -REPORT and -FILE operate only with a TYPE of LOADS. These options are used to control whether or not the results are written to a post-processing file, or the standard output file. The default is to write them only to the output file. If -FILE YES is specified, then the results will be written to both places. If -FILE YES -REPORT NO is specified, then the results will only be written to the post-processing file.

The last options are applicable only to a TYPE of FATIGUE or COUNT. The sets of duration data which will be used are those which match the selector :DURATION_SEL defined with the -DURATION option. The -S_BINS option is applicable only to a type of COUNT. It is used to define a set of "bins" by stress range to accumulate the cycle data. Here, S(1) (ksi or mpa) marks the "top" of the first bin, S(2) the top of the second bin, etc. The stresses which are accumulated include the stress concentration factor. If stress used in computing the CDR depends on the value of FLAG following the -CDR_VONMISES option. If it is YES the Von Mises stress will be used. If it is NO then the principle stresses will be used. Also with FATIGUE, the meaning of -DETAIL, -STANDARD, and -SUMMARY is a bit different. -DETAIL is ignored. For -STANDARD, one receives the total CDRs for all computed points where the maximum of the CDRs lie between L(i) and T(i).