*HEADING
 WU - WITMER RING  -  STRAIN HARDENING        
*NODE
1,0.,2.937,0.,0.,1.,0.
10,2.937,0.,0.,1.,0.,0.
19,0.,-2.937,0.,0.,-1.,0.
*NGEN,LINE=C
1,10,,,0.,0.,0.,0.,0.,-1.
10,19,,,0.,0.,0.,0.,0.,-1.
*ELEMENT,TYPE=B21
1,1,2
*ELGEN,ELSET=RING
1,18
*BEAM SECTION,SECTION=RECT,ELSET=RING,MATERIAL=A1
1.195,.124
,,-1.
7, 
*MATERIAL,NAME=A1
*ELASTIC
1.05D+7, 
*PLASTIC
4.28D+4, 
1.215D+5,.9925
*DENSITY
2.5D-4, 
*INITIAL CONDITIONS,TYPE=VELOCITY
1,2,-6853.
2,1,-1190.
2,2,-6749.
3,1,-2344.
3,2,-6440.
4,1,-3427.              
4,2,-5935.
5,1,-4405.
5,2,-5250.
6,1,-5250.
6,2,-4405.
 7,1,-4451.
 7,2,-2570.
*BOUNDARY
1,1
1,6                               
19,1
19,6
*RESTART,WRITE,FREQUENCY=30
*STEP,INC=200,NLGEOM
*DYNAMIC,HAFTOL=6210.
1.D-6,2.6E-3            
*EL PRINT,FREQUENCY=100
S, 
SF, 
E, 
PE,PEEQ
*EL FILE,FREQUENCY=100
S, 
SF, 
E, 
*EL PRINT,POSITION=AVERAGED AT NODES,FREQUENCY=100
S, 
E, 
*EL FILE,POSITION=AVERAGED AT NODES,FREQUENCY=100
S, 
E, 
*ENERGY PRINT,FREQUENCY=1
*ENERGY FILE,FREQUENCY=30
*PRINT,RESIDUAL=NO,FREQUENCY=10
*NODE PRINT,FREQUENCY=20
U, 
V, 
A, 
*NODE FILE,FREQUENCY=100
U, 
V, 
A, 
*END STEP