help Rec83
  ABAQUS average shell section stress output to MATLAB
  
  Syntax
      #Rec# = Fil2str('*.fil');
      #out# = Rec83(#Rec#)
 
  Description
      Read average shell section stress output from the results (*.fil)
      file generated from the ABAQUS finite element software. The asterisk
      (*) is replaced by the name of the results file. The record key for
      average shell section stress output is 83 (only in ABAQUS/Standard).
      See section "Results file output format" in ABAQUS Analysis User's
      manual for more details.
      The following options with parameters have to be specified in the
      ABAQUS input file for the results (*.fil) file to be created and to
      contain average shell section stress results:
          ...
          *FILE FORMAT, ASCII
          *EL FILE
          SSAVG
          ...
      NOTE: The results file (*.fil) must be placed in the same directory
      with the MATLAB source files in order to be processed.
      
  Input parameters
      #Rec# (string) is an one-row string containing the ASCII code of the
          ABAQUS results (*.fil) file. It is generated by the function
          Fil2str.m.
  
  Output parameters
      #out# ([#n# x #m#]) is a double array containing the attributes of
          the record key 83 as follows:
          Column  1  –  First section stress. 
          Column  2  –  Second section stress. 
          Column  3  –  Etc. (See “Elements” in Abaqus Analysis User's
          Manual for a description of which section stresses are available
          for each shell element type).
          where #n# is the number of elements multiplied by the number of
          integration points multiplied by the number of increments, and
          #m# is the number of average shell section stress components of
          each element. If the results file does not contain the desired
          output, #out# will be an empty array
 
  _________________________________________________________________________
  Copyright (c) 2016
      George Papazafeiropoulos
      Captain, Infrastructure Engineer, Hellenic Air Force
      Civil Engineer, M.Sc., Ph.D. candidate, NTUA
      Email: gpapazafeiropoulos@yahoo.gr
      Website: http://users.ntua.gr/gpapazaf/