*HEADING
: CONTACT PAIR WITH LOAD CONTROL FOR ELASTIC-PLASTIC MATERIAL,
          HIGH INITIAL STIFFNESS, NOT ALIGNED W/ GLOBAL AXES [GKPS4N]
*SYSTEM
*NODE,NSET=NALL
*TRANSFORM,NSET=REFNODES
*NODE,NSET=REFNODES
******************************************************
*ELEMENT,TYPE=R2D2,ELSET=RIGID1
*ELEMENT,TYPE=R2D2,ELSET=RIGID2
*RIGID BODY,ELSET=RIGID1,REFNODE=9998
*RIGID BODY,ELSET=RIGID2,REFNODE=9999
*surface,NAME=MLOWER
RIGID1,SPOS
*surface,NAME=MUPPER
RIGID2,SNEG
*surface,NAME=TOP
EINT,SPOS
*surface,NAME=BOTTOM
EINT,SNEG
*CONTACT PAIR,INTERACTION=ROUGH,ADJUST=0.001,TIED
BOTTOM,MLOWER
TOP,MUPPER
*SURFACE INTERACTION,NAME=ROUGH
*******************************************************
*ELEMENT,TYPE=GKPS4N,ELSET=EINT
*GASKET SECTION,ELSET=EINT,BEHAVIOR=IS
*GASKET BEHAVIOR,NAME=IS
*GASKET ELASTICITY,COMPONENT=MEMBRANE
*GASKET ELASTICITY,COMPONENT=TRANSVERSE SHEAR
*GASKET THICKNESS BEHAVIOR,DIRECTION=LOADING
*GASKET THICKNESS BEHAVIOR,DIRECTION=UNLOADING
*EXPANSION
1.e-2,
*******************************************
*AMPLITUDE,NAME=HIST
 0.,  0.000,  1.,-15.000,  2.,-25.000,  3., -0.100,
 4.,-25.000,  5.,-40.000,  6., -0.100,  7.,-45.000,
 8.,-45.000,  9.,-60.000, 10.,-75.000, 11., -0.100,
12.,-75.000, 13.,-82.500, 14., -0.100, 15.,-82.500,
16.,-95.000
*BOUNDARY
9998,1,2
9998,6,6
9999,1,1
9999,6,6
*******************************************
*STEP,INC=10000
Test Thickness Behavior of Gasket
*STATIC
0.01,16.,,0.01
*CONTROLS,PARAMETER=TIME INCREMENT
,0.25
*PRINT, FREQUENCY=100
*OUTPUT, HISTORY, FREQUENCY=100
*CLOAD,AMP=HIST
9999,2,1.0
*NODE PRINT,FREQ=0
U,RF
*NODE FILE,FREQ=148
U,
RF,
*EL PRINT,ELSET=EINT,FREQ=0
S,
E,
NE,
EE,
PE,
EVOL,
THE,
TEMP,
*EL FILE,ELSET=EINT,FREQ=148
E,
EE,
NE,
PE,
S,
EVOL,
THE,
*OUTPUT,FIELD,FREQ=148,VAR=PRE
*END STEP
*******************************************
** No Test Membrane Behavior of Element
** No Test Transverse Shear Stiffness Behavior of Element
** No Test Free Thermal Expansion of Element
*******************************************