*HEADING
 o 2X2 PLANE STRAIN PLATE
 o NON-LINEAR GEOMETRY
 o MULTIPLE STEPS
 o RESPONSE - E,U 
**
*DSA CONTROLS, TOL=5.E-5
*DESIGN PARAMETER
mu1,a1,
*PARAMETER
dp1 = 1.0
mu1 = -48.3291
mu2 =  26.3505
mu3 =  22.1809
a1  =  3.58961
a2  =  3.84360
a3  =  3.34171
*PREPRINT,MODEL=YES,HISTORY=YES
*NODE,NSET=NALL
 1, 0.0, 0.0
 2, 1.0, 0.0
 3, 2.0, 0.0
 4, 0.0, 1.0
 5, 1.0, 1.0
 6, 2.0, 1.0
 7, 0.0, 2.0
 8, 1.0, 2.0
 9, 2.0, 2.0
*NSET, NSET=BOTTOM
1,2,3
*NSET, NSET=MID_O
5,6
*NSET, NSET=TOP_O
8,9
*ELEMENT, TYPE=CPE4I, ELSET=E1
1,  1,  2,  5,  4
2,  2,  3,  6,  5
3,  4,  5,  8,  7
4,  5,  6,  9,  8
*ELSET,ELSET=ALL
1,2,3,4
*SOLID SECTION, MATERIAL=HYPER, ELSET=ALL
*MATERIAL, NAME=HYPER
*HYPERFOAM,N=3
<mu1>,<a1>, <mu2>, <a2>, <mu3>, <a3>
0.0,
*DENSITY
0.001,
*EQUATION
2
MID_O,2,1.0,4,2,-1.0
2
MID_O,1,1.0,4,1,-1.0
2
TOP_O,2,1.0,7,2,-1.0
2
TOP_O,1,1.0,7,1,-1.0
*STEP,NLGEOM,DSA
 STRECHING STEP
*STATIC
0.3, 1.0
*BOUNDARY
1, ENCASTRE
2, ENCASTRE
3, ENCASTRE
*CLOAD
7,2,3.0
*BOUNDARY
7,1,1,0.0
4,1,1,0.0
*OUTPUT,FIELD,FREQ=6
*NODE OUTPUT
U
*ELEMENT OUTPUT
E
*DESIGN RESPONSE, FREQ=6
*NODE RESPONSE
U
*ELEMENT RESPONSE
LE
*END STEP
*STEP,NLGEOM,DSA
Shearing Step
*STATIC
1.0,1.0
*BOUNDARY,OP=NEW
7, 1,1,1.0
1, ENCASTRE
2, ENCASTRE
3, ENCASTRE
*DESIGN RESPONSE, FREQ=5
*NODE RESPONSE
U
*ELEMENT RESPONSE
LE
*END STEP
*STEP,DSA
*FREQUENCY, EIGENSOLVER=SUBSPACE
3,
*DESIGN RESPONSE
*END STEP