*HEADING
 THE WU-WITMER RING PROBLEM, ADAPTED FROM ABAQUS/Standard EX. 5D-2D-4D-1
**
** Shell Elements: left side of the ring, rate-independent plasticity
**
*NODE
321,-.1,2.937,0.
330,-3.037,0.,0.
339,-.1,-2.937,0.
421,-.1,2.937,1.195
430,-3.037,0.,1.195
439,-.1,-2.937,1.195
*NGEN,LINE=C
321,330,,,-.1,0.,0.,0.,0.,1.
330,339,,,-.1,0.,0.,0.,0.,1.
421,430,,,-.1,0.,1.195,0.,0.,1.
430,439,,,-.1,0.,1.195,0.,0.,1.
*ELEMENT,TYPE=S4R
321,321,322,422,421
*ELGEN,ELSET=LSHELL
321,18,1,1
*SHELL SECTION,ELSET=LSHELL,MATERIAL=A2
.124,7
*NSET,NSET=BOUND
321,421,339,439
*NSET,NSET=NOUT,GENERATE
321,327,1
421,427,1
*ELSET,ELSET=ELOUT,GENERATE
321,327,1
*BOUNDARY
BOUND,1,1
BOUND,6,6
**
*MATERIAL,NAME=A1
*ELASTIC
1.05D+7,.3
*PLASTIC
4.28D+4, 
1.215D+5,.9925
*DENSITY
2.5D-4,
*MATERIAL,NAME=A2
*ELASTIC
1.05D+7,.3
*PLASTIC
4.28D+4, 
1.215D+5,.9925
*DENSITY
2.5D-4,
**
*RESTART,WRITE,NUMBER INTERVAL=2,TIMEMARKS=NO
**
*INITIAL CONDITIONS,TYPE=VELOCITY
321,2,-6853.
322,1,1190.
322,2,-6749.
323,1,2344.
323,2,-6440.
324,1,3427.
324,2,-5935.
325,1,4405.
325,2,-5250.
326,1,5250.
326,2,-4405.
327,1,4451.
327,2,-2570.
421,2,-6853.
422,1,1190.
422,2,-6749.
423,1,2344.
423,2,-6440.
424,1,3427.
424,2,-5935.
425,1,4405.
425,2,-5250.
426,1,5250.
426,2,-4405.
427,1,4451.
427,2,-2570.
**
*NSET, NSET=CHECK
339, 321, 330 
*ELSET,ELSET=QA_TEST_ELOUT
ELOUT,
*NSET,NSET=QA_TEST_CHECK
CHECK,
**
*STEP
*DYNAMIC,EXPLICIT
,2.6E-3   
*OUTPUT, FIELD, NUMBER INTERVAL=100, TIMEMARKS=YES
*ELEMENT OUTPUT
PEEQ,S
*NODE OUTPUT
U,
*FILE OUTPUT,NUMBER INTERVAL=1,TIMEMARKS=YES
*EL FILE,ELSET=ELOUT
PEEQ,
*NODE FILE,NSET=CHECK
U,
*ENERGY FILE
*OUTPUT,HISTORY,VARIABLE=PRESELECT,TIMEINT=0.00026
*END STEP