*HEADING
MISES PLASTICITY WITH COMBINED ISOTROPIC-KINEMATIC HARDENING
WITH MULTIPLE BACKSTRESSES,
SIMPLE SHEAR (DISPLACEMENT CONTROL) TEST; CPS4
*NODE,NSET=ALLN
1,0.,0.
2,1.,0.
3,1.,1.
4,0.,1.
*ELEMENT,TYPE=CPS4,ELSET=ALLE
1,1,2,3,4
*SOLID SECTION,ELSET=ALLE,MATERIAL=ALLE
*MATERIAL,NAME=ALLE
*ELASTIC
200.E3,.3
*PLASTIC, HARDENING=COMBINED, DATA TYPE=PARAMETERS,NUMBERBACKSTRESS=3
200., 1.111E4,34.65, 5.555E3,34.65, 5.555E3,0.0
*CYCLIC HARDENING, PARAMETERS
200., 0., 0.
*BOUNDARY
1,1,2
2,1,2
3,2,2
4,2,2
**STEP 1***
*STEP,INC=20
*STATIC, DIRECT
1., 20.
*BOUNDARY
3,1,1,0.04
4,1,1,0.04
*EL PRINT
S, 
SINV, 
E, 
EP, 
EE, 
EEP, 
PE, 
PEP, 
ALPHA, 
PENER, 
*NODE PRINT
U,RF
*EL FILE,FREQ=10
S, 
SINV, 
E, 
EP, 
EE, 
EEP, 
PE, 
PEP, 
ALPHA, 
*END STEP
**STEP 2**
*STEP, PERTURBATION
*STATIC
*BOUNDARY, OP=NEW
1,1,2,0.
2,2,2,0.
3,2,2,.01
4,2,2,.01
*EL PRINT
S, 
SINV, 
E, 
EP, 
EE, 
EEP, 
PENER, 
*NODE PRINT
U,RF
*EL FILE
S, 
SINV, 
E, 
EP, 
EE, 
EEP, 
*END STEP
**STEP 3***
*STEP,INC=20
*STATIC, DIRECT
1., 20.
*BOUNDARY
3,1,1,0.08
4,1,1,0.08
*EL PRINT
S, 
SINV, 
E, 
EP, 
EE, 
EEP, 
PE, 
PEP, 
ALPHA, 
PENER, 
*NODE PRINT
U,RF
*EL FILE,FREQ=10
S, 
SINV, 
E, 
EP, 
EE, 
EEP, 
PE, 
PEP, 
ALPHA, 
*END STEP