Mitc8 with stress/strain/force output

[victorkemp]

This is hopefully MITC8 finished in a basic useable state. I've removed the DEBUG,250,1 requirement so it should work with normal input files using the new CQUAD8 element.

Description of CQUAD8

   1       2        3       4      5        6       7      8       9      10
<------><------><------><------><------><------><------><------><------><------>
CQUAD8    EID      PID     G1      G2      G3      G4      G5      G6
           G7       G8

PID - must be PSHELL ID, not PCOMP or PCOMP1.
G1-G8 are all required. No optional G5-G8 like MSC.

PSHELL referred to by PID:

• Must have MID2 = MID1
• MID3 can be different from MID1/2
• TS/T can be used
• Must have blank or default values for:
  • 12I/TM**3
  • NSM (MPA)
  • Z1
  • Z2
  • MID4

Material must be MAT1 (isotropic) with zero density.

Solution type must be statics (SOL 1)

Not compatible with:

• Thermal load
• Pressure load
• Gravity load

Stress, strain and engineering force output:

• Only F06, not OP2 or NEU.
• In the element coordinate system which is the same as MSC's.
• At corner grid points and center regardless of whether CENTER or CORNER is specified in case control, same as MSC.
• The center is at the centroid of the 4 corner grid points and the center values are the averages of the corner values.

I've also made a small change to the engineering force format in F06 for all shells to accommodate corner values. The Element ID column is further left and the header includes a "Location" column that's only populated for CQUAD8 elements. Hopefully this won't break any parsers that use space delimiters.
Previous:

                                                       E L E M E N T   E N G I N E E R I N G   F O R C E S
                                                           F O R   E L E M E N T   T Y P E   Q U A D 4  
                 Element         N o r m a l   F o r c e s                       M o m e n t s                   T r a n s v e r s e
                    ID                                                                                         S h e a r   F o r c e s
                              Nxx           Nyy           Nxy           Mxx           Myy           Mxy            Qx           Qy
                       1  0.000000E+00  1.150000E+01  2.000000E+00  3.046240E-03  2.500000E-02 -1.396284E-03  2.486571E-03  1.000000E-01
                       2  0.000000E+00  1.450000E+01  2.000000E+00  4.733241E-04  7.500000E-02 -4.358266E-04 -6.376932E-04  1.000000E-01
                       3  0.000000E+00  5.500000E+00  2.000000E+00  4.733241E-04  7.500000E-02  4.358266E-04  6.376932E-04  1.000000E-01
                       4  0.000000E+00  8.500000E+00  2.000000E+00  3.046240E-03  2.500000E-02  1.396284E-03 -2.486571E-03  1.000000E-01
                          ------------- ------------- ------------- ------------- ------------- ------------- ------------- -------------

This PR:

                                                       E L E M E N T   E N G I N E E R I N G   F O R C E S
                                                           F O R   E L E M E N T   T Y P E   Q U A D 4  
  Element Location               N o r m a l   F o r c e s                       M o m e n t s                   T r a n s v e r s e
     ID                                                                                                        S h e a r   F o r c e s
                              Nxx           Nyy           Nxy           Mxx           Myy           Mxy            Qx           Qy
        1                 0.000000E+00  1.150000E+01  2.000000E+00  3.445167E-03  2.500000E-02 -1.629156E-03  2.520876E-03  1.000000E-01
        2                 0.000000E+00  1.450000E+01  2.000000E+00  4.161607E-04  7.500000E-02 -4.253891E-04 -2.104274E-03  1.000000E-01
        3                 0.000000E+00  5.500000E+00  2.000000E+00  4.161607E-04  7.500000E-02  4.253891E-04  2.104274E-03  1.000000E-01
        4                 0.000000E+00  8.500000E+00  2.000000E+00  3.445167E-03  2.500000E-02  1.629156E-03 -2.520876E-03  1.000000E-01
                          ------------- ------------- ------------- ------------- ------------- ------------- ------------- -------------

[zchlrnr]

Watershed moment.