*HEADING
  - COMPRESSIBLE HYPERELASTICITY (ARRUDA-BOYCE), VOLUMETRIC COMPRESSION
*NODE,NSET=ALL
*NSET,NSET=FACE1
*NSET,NSET=FACE2
*NSET,NSET=FACE3
*NSET,NSET=FACE4
*NSET,NSET=FACE5
*NSET,NSET=FACE6
*ELEMENT,TYPE=C3D8RH,ELSET=ONE
*SOLID SECTION,ELSET=ONE,MATERIAL=ARRUDA
*MATERIAL,NAME=ARRUDA
*HYPERELASTIC,ARRUDA-BOYCE
200., 5., 0.001
*STEP,NLGEOM,INC=20
VOLUMETRIC COMPRESSION
*STATIC,DIRECT
1.,20.
*BOUNDARY,OP=NEW
FACE1,3
FACE3,2
FACE6,1
FACE2,3,3,-.2
FACE4,1,1,-.2
FACE5,2,2,-.2
*EL PRINT,F=10
S,
E,
*NODE PRINT,F=10
U,RF
*OUTPUT,FIELD,FREQ=10
*ELEMENT OUTPUT
S,E
*OUTPUT,FIELD,FREQ=10
*NODE OUTPUT
U,RF
*END STEP