*HEADING
: PERTURBATION ANALYSIS/LOAD CASES FOR ELASTIC MATERIAL WITH DAMAGE [GKPS4]
*NODE,NSET=NALL
1,
2,2.
3,,0.8
4,2.,0.8
*ELEMENT,TYPE=GKPS4,ELSET=EINT
1,1,2,3,4
*GASKET SECTION,ELSET=EINT,BEHAVIOR=IS
*GASKET BEHAVIOR,NAME=IS
*GASKET ELASTICITY,COMPONENT=MEMBRANE
2000.,0.2
*GASKET ELASTICITY
200.,
*GASKET THICKNESS BEHAVIOR,DIRECTION=LOADING,TYPE=DAMAGE
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=DAMAGE
0.,0.,0.139
14.28,0.122,0.139
46.43,0.139,0.139
0.,0.,0.217
12.,0.17,0.217
40.,0.21,0.217
82.14,0.217,0.217
0.,0.,0.287
11.,0.24,0.287
164.3,0.287,0.287
*BOUNDARY
1,1,2
2,2
*STEP
*STATIC
*BOUNDARY
3,2,2,-0.139
4,2,2,-0.139
*NODE PRINT,FREQ=0
U, 
RF, 
*EL PRINT,FREQ=0
S, 
E, 
EE, 
*OUTPUT, FIELD, FREQ=18
*NODE OUTPUT
U, 
RF, 
*ELEMENT OUTPUT
S, 
E, 
EE, 
*END STEP
*STEP,PERTURBATION
*STATIC
*BOUNDARY
3,2,2,-0.1
4,2,2,-0.1
*EL PRINT,FREQ=0
S, 
E, 
EE, 
*OUTPUT, FIELD, FREQ=18
*ELEMENT OUTPUT
S, 
E, 
EE, 
*END STEP
*STEP
*STATIC
*BOUNDARY
3,2,2,-0.08
4,2,2,-0.08
*NODE PRINT,FREQ=0
U, 
RF, 
*EL PRINT,FREQ=0
S, 
E, 
EE, 
*NODE PRINT,FREQ=18
U, 
RF, 
*OUTPUT, FIELD, FREQ=0
*ELEMENT OUTPUT
S, 
E, 
EE, 
*END STEP
*STEP,PERTURBATION
*STATIC
*BOUNDARY
3,2,2,-0.1
4,2,2,-0.1
3,1,1,-0.1
2,1,1,0.1
4,1,1,0.0
*EL PRINT,FREQ=0
S, 
E, 
EE, 
*OUTPUT, FIELD, FREQ=18
*ELEMENT OUTPUT
S, 
E, 
EE, 
*END STEP

*STEP,PERTURBATION
*STATIC
*BOUNDARY
3,2,2,-0.1
4,2,2,-0.1
3,1,1,-0.1
2,1,1,0.1
4,1,1,0.0
*EL PRINT,FREQ=0
S, 
E, 
EE, 
*OUTPUT, FIELD, FREQ=18
*ELEMENT OUTPUT
S, 
E, 
EE, 
*END STEP

*STEP,PERTURBATION
*STATIC
*LOAD CASE,NAME=PRESSURE-1
*BOUNDARY
3,2,2,-0.05
4,2,2,-0.05
*END LOAD CASE
*LOAD CASE,NAME=PRESSURE-2
*BOUNDARY
3,2,2,-0.1
4,2,2,-0.1
*END LOAD CASE
*EL PRINT,FREQ=0
S, 
E, 
EE, 
*OUTPUT, FIELD, FREQ=18
*ELEMENT OUTPUT
S, 
E, 
EE, 
*END STEP