*HEADING
 THE WU-WITMER RING PROBLEM, ADAPTED FROM ABAQUS/Standard EX. 5D-2D-4D-1
**
**  Left side of the ring, rate-independent plasticity
**
*NODE
21,   -.1, 2.937,0. , 0., 1.,0.
30,-3.037,    0.,0. ,-1., 0.,0.
39,   -.1,-2.937,0. , 0.,-1.,0.
*NGEN,LINE=C
21,30,1,, -.1,0.,0., 0.,0.,1.
30,39,1,, -.1,0.,0., 0.,0.,1.
*ELEMENT,TYPE=PIPE21
21,21,22
*ELGEN,ELSET=LRING
21,18
*BEAM SECTION,SECTION=PIPE,ELSET=LRING,MATERIAL=A2
0.117385, 0.0117385
,,-1.
 ,
*MATERIAL,NAME=A2
*ELASTIC
1.05D+7, 
*PLASTIC
4.28D+4, 
1.215D+5,.9925
*DENSITY
2.5D-4, 
*BOUNDARY
21,1
21,6                               
39,1
39,6
*NSET,NSET=NOUT,GENERATE
21,27,1
*ELSET,ELSET=ELOUT,GENERATE
21,27,1
**
*RESTART,WRITE,NUMBER INTERVAL=2,TIMEMARKS=NO
**
*INITIAL CONDITIONS,TYPE=VELOCITY
21,2,-6853.
22,1,1190.
22,2,-6749.
23,1,2344.
23,2,-6440.
24,1,3427.              
24,2,-5935.
25,1,4405.
25,2,-5250.
26,1,5250.
26,2,-4405.
27,1,4451.
27,2,-2570.
**
*NSET, NSET=CHECK
21, 30, 39
*ELSET,ELSET=QA_TEST_ELOUT
ELOUT,
*NSET,NSET=QA_TEST_CHECK
CHECK,
**
*STEP
*DYNAMIC,EXPLICIT
,2.6E-3            
*FILE OUTPUT,NUMBER INTERVAL=1,TIMEMARKS=YES
*EL FILE,ELSET=ELOUT
PEEQ, 
*NODE FILE,NSET=CHECK
U,
*ENERGY FILE
***OUTPUT,HISTORY,TIME INTERVAL=0.0
***ENERGY OUTPUT
**ALLKE,ALLIE,ALLSE,ALLAE,ALLVD,ALLWK,ETOTAL,DT
*OUTPUT, FIELD, NUMBER INTERVAL=1, TIMEMARKS=YES
*ELEMENT OUTPUT, ELSET=QA_TEST_ELOUT
PEEQ, 
*NODE OUTPUT, NSET=QA_TEST_CHECK
U,
*OUTPUT,FIELD,VARIABLE=PRESELECT
*OUTPUT,HISTORY,VARIABLE=PRESELECT,TIMEINT=0.0026
*END STEP