*HEADING
EXSD3NLA: LINEAR BEHAVIOR OF SPRING AND DASHPOT ELEMENTS
[SPRING2, SPRINGA, DASHPOT2, DASHPOTA] 
**Same as EXSD3NLX but with temp/fv dependent spring/dashpot properties
*RESTART,WRITE,OVERLAY
*********************************************
** Define one spring/dashpot 
** systems to be analyzed simultaneously
*********************************************
*NODE,NSET=NALL
11,0.,10.
12,10.,10.
13,20.,10.
*NODE,NSET=TRANS
101,0.,20.
102,10.,30.
103,20.,40.
*NSET,NSET=NALL
TRANS, 
*TRANSFORM,NSET=TRANS,TYPE=R
1.,1.,0.,-1.,1.,0.
**
** Spring Definitions
**
*ELEMENT,TYPE=SPRING2,ELSET=SPR2
2,12,11
3,13,12
*ELEMENT,TYPE=SPRINGA,ELSET=SPRA
4,102,101
5,103,102
**
** Dashpot Definitions
**
*ELEMENT,TYPE=DASHPOT2,ELSET=DSH2
7,13,12
*ELEMENT,TYPE=DASHPOTA,ELSET=DSHA
8,103,102
**
** Point Masses
**
*ELEMENT,TYPE=MASS,ELSET=MA
10,12
11,13
12,102
13,103
*NSET,NSET=MASSES
2,12,13,102,103
**
** Property Definitions
**
*ORIENTATION,NAME=TRANS,DEFINITION=COORDINATES
1.,1.,0.,-1.,1.,0.
*SPRING,ELSET=SPR1,DEPENDENCIES=2
1, 
1.e-10,,  0.,0.,0.
  30.0,,200.,0.,0.
1.e-10,,  0.,2.,0.
  50.0,,200.,2.,0.
1.e-10,,  0.,0.,2.
  70.0,,200.,0.,2.
1.e-10,,  0.,2.,2.
  90.0,,200.,2.,2.
*SPRING,ELSET=SPR2,DEPENDENCIES=2
1,1
1.e-10,,  0.,0.,0.
  30.0,,200.,0.,0.
1.e-10,,  0.,2.,0.
  50.0,,200.,2.,0.
1.e-10,,  0.,0.,2.
  70.0,,200.,0.,2.
1.e-10,,  0.,2.,2.
  90.0,,200.,2.,2.
*SPRING,ELSET=SPRA,ORIENTATION=TRANS,DEPENDENCIES=2

1.e-10,,0.,0.,0.
30.0,,200.,0.,0.
1.e-10,,0.,2.,0.
50.0,,200.,2.,0.
1.e-10,,0.,0.,2.
70.0,,200.,0.,2.
1.e-10,,0.,2.,2.
90.0,,200.,2.,2.
*DASHPOT,ELSET=DSH1
1, 
1.e-10,,0.0
0.24,,200.
*DASHPOT,ELSET=DSH2,DEPENDENCIES=2
1,1
1.e-10,,0.,0.,0.
0.18,,200.,0.,0.
1.e-10,,0.,2.,0.
0.22,,200.,2.,0.
1.e-10,,0.,0.,2.
0.26,,200.,0.,2.
1.e-10,,0.,2.,2.
0.30,,200.,2.,2.
*DASHPOT,ELSET=DSHA,ORIENTATION=TRANS,DEPENDENCIES=2

1.e-10,,0.,0.,0.
0.18,,200.,0.,0.
1.e-10,,0.,2.,0.
0.22,,200.,2.,0.
1.e-10,,0.,0.,2.
0.26,,200.,0.,2.
1.e-10,,0.,2.,2.
0.30,,200.,2.,2.
*MASS,ELSET=MA
0.02588, 
**
*AMPLITUDE,NAME=STEPPED
0.,1.,100.,1.
*INITIAL CONDITIONS,TYPE=TEMPERATURE
NALL,0.
*INITIAL CONDITIONS,TYPE=FIELD,VARIABLE=1
NALL,0.
*INITIAL CONDITIONS,TYPE=FIELD,VARIABLE=2
NALL,0.
**
**
****************************
** Analysis
****************************
**
****************************
** Test Elements
**	SPRING2,DASHPOT2
****************************
**
** ---------------- STEP 3
**
*STEP
  STRETCH OUT 
*STATIC
1.E2,1.E2
*BOUNDARY,OP=NEW
** Fix mid mass and Stretch end mass of spr2 and sprA systems
11,1,6
101,1,6
12,1,6
102,1,6
13,1,1,1.
13,2,6
103,1,1,1.
103,2,6
*TEMPERATURE,AMPLITUDE=STEPPED
NALL,100.
*FIELD,AMPLITUDE=STEPPED,VARIABLE=1
NALL, 1.
*FIELD,AMPLITUDE=STEPPED,VARIABLE=2
NALL, 1.
*EL PRINT, FREQ=2,SUMMARY=NO
S, 
E, 
*NODE PRINT,FREQ=2,SUMMARY=NO,GLOBAL=NO
U, 
V, 
A, 
CF, 
RF, 
*NODE FILE,NSET=NALL,FREQ=10,GLOBAL=NO
U , V , A
*EL FILE,FREQUENCY=10
S,E
*END STEP
*****************************
** Release Stretched System
*****************************
***
** ---------------- STEP 4
**
*STEP,INC=10000
 RELEASE
*DYNAMIC,HAFTOL=0.1
5.E-9,0.7,1.E-9
*BOUNDARY,OP=NEW
**
** Removed previous BC's.  Now we add all but
** those belonging to the mass nodes, so they
** are free to move.
**
11,1,6
101,1,6
*NODE FILE,NSET=NALL,FREQ=1,GLOBAL=NO
U,V,A
*EL FILE,FREQ=50
S,E
*END STEP