*HEADING
 :  CPE4 MODEL CHANGE VERIFICATION; ELASTIC-PLASTIC MATERIAL
*NODE
1,
11,5.
401,,2.
411,5.,2.
*NGEN,NSET=BOT
1,11,1
*NGEN,NSET=TOP
401,411,1
*NFILL,NSET=NALL
BOT,TOP,4,100
*NSET, NSET=XFIX, GEN
1, 401, 100
*NSET, NSET=YFIX
1, 
*NSET, NSET=YFIX2
11, 
*NSET, NSET=XMOVE, GEN
11, 411, 100
*NSET, NSET=YMOVE, GEN
205, 207, 1
405, 407, 1
*ELEMENT,TYPE=CPE4,ELSET=EALL
1,1,3,203,201
*ELGEN,ELSET=EALL
1,5,2,1,2,200,5
*ELSET, ELSET=EREMOV
2,3,4,7,8,9
*SOLID SECTION,MATERIAL=MAT1,ELSET=EALL
1.,
*MATERIAL,NAME=MAT1
*ELASTIC
3.0E6,0.3
*PLASTIC
0.15E5, 0.0
0.6E5, 2.027E-4
*BOUNDARY
YFIX, 2, 2
XFIX, 1,1
YFIX2, 2,2
*STEP,NLGEOM
 COMPRESS ELEMENTS
*STATIC
0.1,1.,0.1,0.1
*BOUNDARY
XMOVE, 1,1 ,-0.1
*NODE PRINT, FREQ=99
U, 
RF, 
*EL PRIN, FREQ=99
E, 
NE, 
S, 
MISES, PE
EE11, PE11, E11
*EL FILE, FREQ=99
E, NE, S, PE, SINV
*NODE FILE, FREQ=99
U, RF
*END STEP
*STEP,NLGEOM
REMOVE MIDDLE ELEMENTS
*STATIC
1.,1.
*MODEL CHANGE,REMOVE,TYPE=ELEMENT
EREMOV,
*END STEP
*STEP,NLGEOM
*STATIC
1.,1.
*BOUNDARY
YMOVE, 2,2, 0.0
*END STEP
*STEP,NLGEOM
 ADD ELEMENTS BACK IN
*STATIC
0.1,1.,0.1,0.1
*MODEL CHANGE,ADD,TYPE=ELEMENT
EREMOV, 
*BOUNDARY,OP=NEW
YFIX, 2, 2
XFIX, 1,1
YFIX2, 2,2
XMOVE, 1,1 ,-0.005
*END STEP