*Heading
** ramping initial stress c3d8R element, initial stress due to initial metric method
** results compared to no-ramping initial stress ---hypeelastic material
*Preprint, echo=NO, model=NO, history=NO, contact=NO
** ----------------------------------------------------------------
*Node
1, 0, 0.5, 0
2, 0, 0, 0
3, 0, 0.5, .5
4, 0, 0, .5
5, 0.55, 0.5, 0
6, 0.55, 0, 0
7, 0.55, 0.5, .5
8, 0.55, 0, .5
11, 0, 0.5, 1
12, 0, 0, 1
13, 0, 0.5, 1.5
14, 0, 0, 1.5
15, 0.55, 0.5, 1
16, 0.55, 0, 1
17, 0.55, 0.5, 1.5
18, 0.55, 0, 1.5
*orientation, name=ori
-1.,   0.,   0.,   0.,   -1.,   0.
 3, 15.
*orientation,name=ori-1,local directions=2
 1.0,0.0,0.0,0.0,1.0,0.0
 3,0.0
 0.643055,0.76582,0.0
 0.643055,-0.76582,0.0
*Element, type=C3D8R
1, 5, 6, 8, 7, 1, 2, 4, 3
2, 15, 16, 18, 17, 11, 12, 14, 13
*Nset, nset=NALL
 1,  8,  1
 11, 18, 1
*Elset, elset=E1
 1
*Elset, elset=E2
 2
*Elset, elset=EALL
 1, 2
** Section: Section-1
*Solid Section, elset=E1, MATERIAL=fung, orientation=ori-1, controls=sc1-rampStress
,
*Solid Section, elset=E2, MATERIAL=fung, orientation=ori-1
,
*System
**
*INITIAL CONDITION, TYPE=NODE REF COORD
1, 0, 0.5, 0
2, 0, 0, 0
3, 0, 0.5, .5
4, 0, 0, .5
5, 0.5, 0.5, 0
6, 0.5, 0, 0
7, 0.5, 0.5, .5
8, 0.5, 0, .5
11, 0, 0.5, 0
12, 0, 0, 0
13, 0, 0.5, .5
14, 0, 0, .5
15, 0.5, 0.5, 0
16, 0.5, 0, 0
17, 0.5, 0.5, .5
18, 0.5, 0, .5
*SECTION CONTROLS,NAME=sc1-rampStress,HOURGLASS=STIFFNESS,RAMP INITIAL STRESS=RampStress
,,,
**------------------ramping initial stresses------------------**********
*AMPLITUDE, NAME = RampStress, DEFINITION = Smooth Step,time=total time
0.0, 0.0, 0.0001, 1.0,  0.001, 1.0
** 
** MATERIALS
** 
*parameter
 c = 26.95e3
 d = 1.5e-7
 b1 = 0.9925
 b2 = 0.4180
 b3 = 0.0089
 b4 = 0.0749
 b5 = 0.0295
 b6 = 0.0193
 b7 = 5.0000
 b8 = b7
 b9 = b7
 b1111 = b1
 b1122 = b4
 b2222 = b2
 b1133 = b5
 b2233 = b6
 b3333 = b3
 b1212 = b7
 b1313 = b8
 b2323 = b9
 density=1.0e-2
*material,name=fung
*density
 <density>
*anisotropic hyperelastic,fung-ortho
 <b1111>,<b1122>,<b2222>,<b1133>,<b2233>,<b3333>,<b1212>,<b1313>,
 <b2323>,<c>,<d>
*NSET, NSET=QA_TEST-ramp
1,
*ELSET, ELSET=QA_TEST-ramp
1,
*NSET, NSET=QA_TEST-noramp
12,
*ELSET, ELSET=QA_TEST-noramp
2,
** ----------------------------------------------------------------
** 
** STEP: Step-1
** 
*Step, name=Step-1, nlgeom=YES
*Dynamic, Explicit
, 0.001
*Bulk Viscosity
0.06, 1.2
** 
** OUTPUT REQUESTS
** 
*Output, field, NUMBER INTERVAL=1
*ELEMENT OUTPUT, ELSET=EALL
S,LE
*NODE OUTPUT, NSET=NALL
U,V
*Output, field, NUMBER INTERVAL=1
*ELEMENT OUTPUT, ELSET=QA_TEST-ramp
S,
*NODE OUTPUT, NSET=QA_TEST-ramp
U,
** 
** HISTORY OUTPUT: H-Output-1
** 
*Output, history, variable=PRESELECT, FREQ = 1
*Node Output, nset = QA_TEST-ramp
U
*ELEMENT OUTPUT, ELSET=QA_TEST-ramp
S,
*Output, history, variable=PRESELECT, FREQ = 1
*Node Output, nset = QA_TEST-noramp
U
*ELEMENT OUTPUT, ELSET=QA_TEST-noramp
S,
*OUTPUT,HISTORY, FREQ=1
*Energy Output, per element set, var=preselect
*End Step