*HEADING
  BASIC VERIFICATION OF CREEP (RELAXATION TEST)      
*NODE
201,1.,11.
208,8.,11.
301,1.,21.
308,8.,21.
*NGEN,NSET=BOT
201,208
*NGEN,NSET=TOP
301,308
*NSET,NSET=LEFT
201,301,203,303,205,305,207,307
*ELEMENT,TYPE=CPS4
5,201,202,302,301
*ELGEN
5,4,2
*ELSET,ELSET=DATTIM
5, 
*ELSET,ELSET=DATSTR
6, 
*ELSET,ELSET=USETIM
7, 
*ELSET,ELSET=USESTR
8, 
*ELSET,ELSET=RELAXERS
5,6,7,8
*SOLID SECTION,ELSET=DATTIM,MATERIAL=A1
*MATERIAL,NAME= A1
*ELASTIC
20E6,.3
*CREEP,LAW=TIME
2.5E-27,5,-0.2
*SOLID SECTION,ELSET=DATSTR,MATERIAL=A2
*MATERIAL,NAME= A2
*ELASTIC
20E6,.3
*CREEP,LAW=STRAIN
2.5E-27,5,-0.2
*SOLID SECTION,ELSET=USETIM,MATERIAL=A3
*MATERIAL,NAME= A3
*ELASTIC
20E6,.3
*CREEP,LAW=USER
*SOLID SECTION,ELSET=USESTR,MATERIAL=A4
*MATERIAL,NAME= A4
*ELASTIC
20E6,.3
*CREEP,LAW=USER
*DEPVAR
1, 
*BOUNDARY
BOT,2
LEFT,1
*****
*****
*RESTART,WRITE,FREQUENCY=20

*STEP
**          STEP 1 ----- LINEAR ELASTIC IMPOSED DISPLACEMENT
*STATIC
1.0E-7,1.0E-7
*BOUNDARY,OP=MOD
301,2,2,.01
302,2,2,.01
303,2,2,.01
304,2,2,.01
305,2,2,.01
306,2,2,.01
307,2,2,.01
308,2,2,.01
*EL FILE,FREQUENCY=20
SDV, 
S, 
CE, 
*END STEP
*STEP,INC=250
**          STEP 2 ----- RELAXATION TEST
*VISCO,CETOL=5E-6
0.01,100000.,1.E-3
*PRINT,FREQUENCY=10
*EL PRINT,ELSET=RELAXERS,FREQUENCY=20,POSITION=CENTROID,SUMMARY=NO
SDV,S
CE, 
*EL FILE,ELSET=RELAXERS,FREQUENCY=20,POSITION=CENTROID
SDV,S,CE
*NODE PRINT,FREQUENCY=20,SUMMARY=NO
RF, 
*END STEP