*Heading
*preprint,mode=yes,hist=yes
*Node,nset=nall
      1,          -5.,           5.,           0.
      2,          -5.,           0.,           0.
      4,          -5.,           5.,      15.3846
      5,          -5.0001,       0.,      15.3846
    199,           0.,           5.,           0.
    200,           0.,           0.,           0.
    202,           0.,           5.,      15.3847
    203,           0.,           0.0001,  15.3846
    204,           0.,          -5.,      15.3846
    595,           0.,           5.,      7.69231
    596,           0.,          2.5,      15.3846
    597,           0.,           0.,      7.69231
    598,           0.,          2.5,           0.
    599,          -5.,          2.5,           0.
    600,          -5.,           0.,      7.69231
    601,          -5.,          2.5,      15.3846
    602,          -5.,           5.,      7.69231
    603,         -2.5,           0.,           0.
    604,         -2.5,           5.,           0.
    605,         -2.5,           0.,      15.3846
    606,         -2.5,           5.,      15.3846
*Nset, nset=end
    1,    2,   199,  200,   598,  599,  603,  604
*Element, type=C3D8,ELSET=ONE
  1,  199,  200,  203,  202,    1,    2,    5,    4
*SOLID SECTION, ELSET=ONE,MATERIAL=mat
*Material, name=mat
*Hyperelastic
 200000.0, , 0.001
*Expansion,FIELD=1
 0.5e-05,
*Expansion,FIELD=2
 0.5e-05,
*Initial Conditions, type=FIELD, VARIABLE=1
 nall, 0.
*Initial Conditions, type=FIELD, VARIABLE=2
 nall, 0.
*BOUNDARY
 end, 1,3
** ----------------------------------------------------------------
*Step,nlgeom
*Static
*Field, variable=1
 nall, 100.
*Field, variable=2
 nall, 100.
*OUTPUT,FIELD
*NODE OUTPUT
 U,RF
*ELEMENT OUTPUT
 S, E, EE
*EL PRINT
S,
E,
EE,
*NODE PRINT
U,
RF,
*End Step
** ----------------------------------------------------------------
*Step, perturbation,nlgeom
*Static
*Field, variable=1
 nall, 200.
*Field, variable=2
 nall, 200.
*OUTPUT,FIELD
*NODE OUTPUT
 U,RF
*ELEMENT OUTPUT
 S, E, EE
*EL PRINT
S,
E,
EE,
*NODE PRINT
U,
RF,
*End Step
** ----------------------------------------------------------------
*Step, nlgeom
*Buckle
 5
*Field, variable=1
 nall, 300.0
*Field, variable=2
 nall, 300.0
*OUTPUT,FIELD
*ELEMENT OUTPUT
 S
*EL PRINT
 S
*End Step