*HEADING
: NAFEMS TEST NL1: PRECRIBED BI-AXIAL STRAIN HISTORY, PLANE STRAIN
CPE4R ELEMENTS
*NODE
1, 0.,0.
2, 1.,0.
3, 1.,1.
4, 0.,1.
11, 0.,0.
12, 1.,0.
13, 1.,1.
14, 0.,1.
*NSET,NSET=BOT
1,2,11,12
*NSET,NSET=TOP
3,4,13,14
*NSET,NSET=LEFT
1,4,11,14
*NSET,NSET=RIGHT
2,3,12,13
*ELEMENT,TYPE=CPE4R,ELSET=EL1
1, 1,2,3,4
*ELEMENT,TYPE=CPE4R,ELSET=EL2
11, 11,12,13,14
*SOLID SECTION,MATERIAL=M1,ELSET=EL1
*MATERIAL,NAME=M1
*ELASTIC
250.E9,0.25
*PLASTIC
5.E6, 0.
*SOLID SECTION,MATERIAL=M2,ELSET=EL2
*MATERIAL,NAME=M2
*ELASTIC
250.E9,0.25
*PLASTIC
5.E6, 0.
62.5E9,1.
** Step 1
*STEP,INC=100
*STATIC,DIRECT
.1,1.
*BOUNDARY,OP=NEW
BOT  ,2
LEFT ,1
TOP  ,2
RIGHT,1,1,0.25E-4
*NODE PRINT,F=0
*EL PRINT,F=100
MISES, 
*EL FILE,F=100
SINV, 
*ENDSTEP
** Step 2
*STEP,INC=100
*STATIC,DIRECT
.1,1.
*BOUNDARY,OP=NEW
BOT  ,2
LEFT ,1
TOP  ,2
RIGHT,1,1,0.5E-4
*EL FILE,F=100
SINV, 
*ENDSTEP
** Step 3
*STEP,INC=100
*STATIC,DIRECT
.1,1.
*BOUNDARY,OP=NEW
BOT  ,2
LEFT ,1
TOP  ,2,2,0.25E-4
RIGHT,1,1,0.5E-4
*EL FILE,F=100
SINV, 
*ENDSTEP
** Step 4
*STEP,INC=100
*STATIC,DIRECT
.1,1.
*BOUNDARY,OP=NEW
BOT  ,2
LEFT ,1
TOP  ,2,2,0.5E-4
RIGHT,1,1,0.5E-4
*EL FILE,F=100
SINV, 
*ENDSTEP
** Step 5
*STEP,INC=100
*STATIC,DIRECT
.1,1.
*BOUNDARY,OP=NEW
BOT  ,2
LEFT ,1
TOP  ,2,2,0.5E-4
RIGHT,1,1,0.25E-4
*EL FILE,F=100
SINV, 
*ENDSTEP
** Step 6
*STEP,INC=100
*STATIC,DIRECT
.1,1.
*BOUNDARY,OP=NEW
BOT  ,2
LEFT ,1
TOP  ,2,2,0.5E-4
RIGHT,1
*EL FILE
SINV, 
*ENDSTEP
** Step 7
*STEP,INC=100
*STATIC,DIRECT
.1,1.
*BOUNDARY,OP=NEW
BOT  ,2
LEFT ,1
TOP  ,2,2,0.25E-4
RIGHT,1
*EL FILE,F=100
SINV, 
*ENDSTEP
** Step 8
*STEP,INC=100
*STATIC,DIRECT
.1,1.
*BOUNDARY,OP=NEW
BOT  ,2
LEFT ,1
TOP  ,2
RIGHT,1
*EL FILE,F=100
SINV, 
*ENDSTEP