TORSION OF A SQUARE BAR, 1/8 SYMMETRY, (4 ELEMS)
   15    4    1    6    2    0    0    0    0    0    2    2    3    2    1    1
    0    0    0    2    0    0    0    1    0    1    8    0    0    0    0    0
SEGERLIND, 2ND EDITION EXAMPLE P. 102
U1=217, U2=159, U4=125, T=21.9 VIA LINEAR ELEMENTS (T THEORY = 24.5)
         1         0 0.        0.
         2         0 0.25      0.
         3         1 0.5       0.
         4         0 0.25      0.25
         5         1 0.5       0.25
         6         1 0.5       0.5
         7         0 0.125     0.
         8         0 0.375     0.
         9         0 0.125     0.125
        10         0 0.25      0.125
        11         0 0.375     0.125
        12         1 0.5       0.125
        13         0 0.375     0.25
        14         0 0.375     0.375
        15         1 0.5       0.375
    1    1    2    4    7   10    9
    2    2    3    5    8   12   11
    3    4    5    6   13   15   14
    4    2    5    4   11   13   10
         3         1 0.
         5         1 0.
         6         1 0.
        12         1 0.
        15         1 0.
         1 8.e6       1.745e-4
