*HEADING
FeFp: c3d8r, biaxial tension, orientation
Ogden, mullins effect
Uniaxial and biaxial test data for input
*NODE,NSET=one
1,
2,1.
3,1.,1.,
4,0.,1.,
5,0.,0.,1.
6,1.,0.,1.
7,1.,1.,1.
8,0.,1.,1.
*NSET,NSET=FACE1
1,2,3,4
*NSET,NSET=FACE2
5,6,7,8
*NSET,NSET=FACE3
1,2,5,6
*NSET,NSET=FACE4
2,3,6,7
*NSET,NSET=FACE5
3,4,7,8
*NSET,NSET=FACE6
4,1,8,5
*nset,nset=nout
6
*ELEMENT,TYPE=C3D8R,ELSET=ONE
1,1,2,3,4,5,6,7,8
*orientation,name=ori1
1.,1.,1., 0.,0.,1.,

*SOLID SECTION,ELSET=ONE,MATERIAL=mat-129,ori=ori1
*MATERIAL,NAME=mat-129
*DENSITY
1.e-6
*HYPERELASTIC,ogden, n=3,test, poisson=0.49
*include, input=heplmu_matprops.inp
*amplitude,name=nominal_strain,definition=smooth step
0.0,0.0, 0.1,0.186595, 0.2,0.006786, 0.4,0.388704,
0.5,0.013413, 0.8,1.0
*STEP
*dynamic, explicit
 ,.8
*BOUNDARY
FACE1,3
FACE3,2
FACE6,1
*boundary, amplitude=nominal_strain
face4,1,,1.
face2,3,,1.
*output,history,freq=1
*node output,nset=nout
u1,rf1
*output,field
*node output
u
*element output
s
*END STEP