*HEADING 
: DIRECT ENFORCEMENT DISPLACEMENT CONTROL FOR ELASTIC-PLASTIC MATERIAL 
          LOW INITIAL STIFFNESS, INITIAL GAP [GKAX6]
*NODE,NSET=NALL
1, 3.0,  0.0
2, 3.5,  0.0
3, 4.0,  0.0
4, 3.0,  1.0
5, 3.5,  1.0
6, 4.0,  1.0
*ELEMENT,TYPE=GKAX6,ELSET=EINT
1,1,2,3,4,5,6
*GASKET SECTION,ELSET=EINT,BEHAVIOR=IS
,0.1
*GASKET BEHAVIOR,NAME=IS
*GASKET ELASTICITY,COMPONENT=MEMBRANE
2000.,0.2
*GASKET ELASTICITY,COMPONENT=TRANSVERSE SHEAR
200.,
*GASKET THICKNESS  BEHAVIOR,DIRECTION=LOADING,TYPE=ELASTIC-PLASTIC
0.,0.
10.71,0.052
28.57,0.087
46.43,0.139
82.14,0.217
164.3,0.287
*GASKET THICKNESS BEHAVIOR,DIRECTION=UNLOADING,TYPE=ELASTIC-PLASTIC
0.,0.087,0.087
14.28,0.122,0.087
46.43,0.139,0.087
0.,0.169,0.169
25.,0.20,0.169
82.14,0.217,0.169
0.,0.23,0.23
35.7,0.265,0.23
164.3,0.287,0.23
*EXPANSION
1.e-2,
*******************************************
*AMPLITUDE,NAME=HIST
0.0,0.0, 1.0,-0.189, 2.0,-0.198, 3.0,-0., 
4.0,-0.198, 5.0,-0.205, 6.0,-0., 7.0,-0.205,
8.0,-0.31, 9.0,-0.0, 10.0,-0.31, 11.0,-0.32, 
12.0,-0.0, 13.0,-0.32, 14.0,-0.33, 15.0,-0.0, 
16.0,-0.33, 17.0,-0.339, 18.0,-0., 19.0,-0.339,
20.0,-0.417, 21.0,-0.0, 22.0,-0.417, 23.0,-0.440, 
24.0,-0., 25.0,-0.440, 26.0,-0.465, 27.0,-0.0, 
28.0,-0.47, 29.0,-0.495, 30.0,-0.
*BOUNDARY
1,1,2
2,1,2
3,1,2
*******************************************
*STEP,INC=10000,NLGEOM
Test Normal Behavior of Gasket
*STATIC
0.01,20.,,0.01
*PRINT, FREQUENCY=100
*OUTPUT, FIELD, FREQUENCY=100
*OUTPUT, HISTORY, FREQUENCY=100
*BOUNDARY,AMP=HIST
4, 2,2,1.0
5, 2,2,1.0
6, 2,2,1.0
*NODE PRINT,FREQ=0
U,RF
*NODE FILE,FREQ=148
U, 
RF, 
*EL PRINT,FREQ=0
S , 
E, 
NE, 
EE, 
PE, 
EVOL, 
THE, 
TEMP, 
*EL FILE,FREQ=148
E, 
EE, 
NE, 
PE, 
S, 
EVOL, 
THE, 
*END STEP
*******************************************
*STEP
Test Membrane Behavior of Element
*STATIC
*BOUNDARY,OP=NEW
1, 1, 2, 0.0
2, 2, 2, 0.0
3, 1, 1, 0.025
3, 2, 2, 0.0
4, 1, 2, 0.0
5, 2, 2, 0.0
6, 1, 1, 0.025
6, 2, 2, 0.0
*END STEP
*******************************************
*STEP
Test Transverse Shear Stiffness of Element
*STATIC
*BOUNDARY,OP=NEW
1,  1,  2,  0.0
2,  1,  2,  0.0
3,  1,  2,  0.0
4,  1,  1,  0.025
4,  2,  2,  0.0
5,  1,  1,  0.025
5,  2,  2,  0.0
6,  1,  1,  0.025
6,  2,  2,  0.0
*END STEP
*******************************************
*STEP
Free Thermal Expansion of Element
*STATIC
*BOUNDARY,OP=NEW
1,2
2,2
3,2
*TEMPERATURE,OP=NEW
NALL,100.
*END STEP
*******************************************