*HEADING
 NCRACR8X: NAFEMS CREEP BENCHMKS 2D PLN STRESS--BIAXIAL (NEG) STEPPED LD (CPS8R)
 TEST 10(c) -- PRIMARY CREEP
*NODE
1,0.,0,
3,100.,0.
7,0.,100.
9,100.,100.
*NGEN,NSET=LEFT
1,7,3
*NGEN,NSET=RIGHT
3,9,3
*NFILL,NSET=ALL
LEFT,RIGHT,2,1
*NSET,NSET=BOTTOM,GENERATE
1,3
**
** ELEMENT DEFINITION
**
*ELEMENT,TYPE=CPS8R,ELSET=CREEP
1,1,3,9,7,2,6,8,4
*SOLID SECTION,ELSET=CREEP,MATERIAL=STEEL
*MATERIAL,NAME=STEEL
*ELASTIC
200.D3,0.3
** NOTE:  CONSTANT A MUST BE MULTIPLIED BY .5 (TIME HARDENING ASSUMPTION)
*CREEP,LAW=TIME
1.5625D-14,5.,-0.5
*BOUNDARY
LEFT,1,1
BOTTOM,2,2
**
**
**
*STEP
 PRESCRIBED TENSILE STRESS
*STATIC
1.E-7,1.E-6
*DLOAD
1,P2,-200.
1,P3,200.
*EL PRINT,SUMMARY=NO,FREQ=10
S,SINV
*NODE PRINT
U, 
*END STEP
**-------------------------- CREEP STEP
*STEP,INC=700
 CREEP STEP
*VISCO,CETOL=5.D-3
1.D-6,100.,,10.
*EL PRINT
CE,S
CENER, 
*EL FILE
CE, 
*OUTPUT,FIELD
*ELEMENT OUTPUT
CE,
*NODE PRINT,SUMMARY=NO,FREQ=10
U, 
*END STEP
**-------------------------
** ELASTIC STEP 
**-------------------------
*STEP
 CREEP STRESS=250 FROM 100 TO 200 HOURS
*STATIC
1.E-7,1.E-6
*DLOAD
1,P2,-250
1,P3,250.
*EL PRINT
S,SINV
CE, 
*NODE PRINT
U, 
*END STEP
**----------------------- CREEP STEP
*STEP,INC=700
 CREEP STEP FROM 100 TO 200 HOURS
*VISCO,CETOL=5.D-3
1.D-6,100.,,10.
*EL PRINT
CE,S
CENER, 
*EL FILE
CE, 
*OUTPUT,FIELD
*ELEMENT OUTPUT
CE,
*NODE PRINT
U,COORD
*END STEP