*HEADING
 - Adding/removing elements and verification for initial conditions
 - Test for C3D8 element
*IMPORT, STEP=1, UPDATE=YES, STATE=YES
 E3,
*NODE, NSET=N4
 201,0,0,0
 202,2,0,0
 203,2,2,0
 204,0,2,0
 205,0,0,2
 206,2,0,2
 207,2,2,2
 208,0,2,2
*ELEMENT, TYPE=C3D8, ELSET=E4
 201,201,202,203,204,205,206,207,208
*SOLID SECTION, ELSET=E4, MATERIAL=MAT3
*MATERIAL, NAME=MAT3
*HYPERELASTIC
3.2E6,0.8E6,0.001
*DENSITY
1000., 
*BOUNDARY
 201,1,3
 111,1,3
 202,2,3
 112,2,3
 203,3,3
 113,3,3
 204,1,1
 204,3,3
 114,1,1
 114,3,3
 205,1,2
 115,1,2
 206,2,2
 116,2,2
 208,1,1
 118,1,1
*INITIAL CONDITIONS, TYPE=VELOCITY
 SIDE_2,1,0.1
*NSET, NSET=SIDE_3
 202,203,206,207
*NSET, NSET=END
 SIDE_2, SIDE_3
*RESTART,WRITE
*STEP,NLGEOM
*DYNAMIC
0.01,0.1
*BOUNDARY, TYPE=VELOCITY
 SIDE_3,1,1,20.
*NODE FILE
 U,
 COORD,
*EL FILE
 LE,S
*OUTPUT,FIELD,VAR=PRESELECT,FREQ=1
*OUTPUT,HISTORY,VAR=PRESELECT,FREQ=1
*END STEP