*HEADING
Pre-tension Section Test []
Procedures Tested: Static with *transform
Elements Tested: C3D8IH
**
*RESTART,WRITE
*SYSTEM
0.,0.,0.,1.,1.,0.
*NODE
      27,          4.,          0.
      28,          5.,          0.
      29,          4.,          1.
      30,          5.,          1.
      31,          4.,          0.,          1.
      32,          5.,          0.,          1.
      33,          4.,          1.,          1.
      34,          5.,          1.,          1.
      37,          4.,          2.
      38,          5.,          2.
      41,          4.,          2.,          1.
      42,          5.,          2.,          1.
** pre-tension section nodes
*NODE,NSET=NREF
    1001,          0.,          0.
*ELEMENT, TYPE=C3D8IH, ELSET=EC3D
       7,      27,      28,      30,      29,      31,      32,
      34,      33
       8,      29,      30,      38,      37,      33,      34,
      42,      41
*SOLID SECTION,ELSET=EC3D,MATERIAL=MAT
*MATERIAL,NAME=MAT
*HYPERELASTIC,N=1
80.,20.
**
** Node Sets for Boundary Conditions
**
*NSET, NSET=XSYMM
      27,      29,      31,      33,      37,       41
*NSET, NSET=YSYMM
       27,      28,      31,     32
*NSET, NSET=ZSYMM
      27,      28,      29,      30,      37,       38
*NSET, NSET=NPULL
      37,      38,      41,      42
*NSET,NSET=NTRANS
XSYMM,YSYMM,ZSYMM,NPULL
*TRANSFORM,NSET=NTRANS,TYPE=R
1.,1.,0.,-1.,1.,0.
**
** Pre-tension Sections
**
*surface,NAME=SC3D
7,S5
*PRE-TENSION SECTION, SURFACE=SC3D, NODE=1001
**
** Analysis
**
*STEP,NLGEOM
pre-tension section by tightening
*STATIC
*BOUNDARY
XSYMM,1,,
YSYMM,2,,
ZSYMM,3,,
NPULL,2,,
NREF,1,,0.1
*END STEP
*STEP,NLGEOM
further loading from initial tightened state
*STATIC
*BOUNDARY
NPULL,2,,0.1
*output,field
*node output
U,RF
*output,history
*element output,elset=EC3D
S11,s22,s33
e11,e22,e33
*ENDSTEP