*HEADING
Pre-tension Section Test []
Procedures Tested: Static, Static Perturbation, Static NLGEOM
Elements Tested: T3D2, T3D3, C3D8R, T3D3, C3D10M
**
*NODE
       1,          0.,          0.
       2,          0.,          1.
       4,          0.,          2.
       5,          1.,          0.
       6,          1.,         0.5
       7,          1.,          1.
       9,          1.,         1.5
      10,          1.,          2.
      11,          2.,          0.
      12,          3.,          0.
      13,          2.,          1.
      14,          3.,          1.
      15,          2.,          0.,          1.
      16,          3.,          0.,          1.
      17,          2.,          1.,          1.
      18,          3.,          1.,          1.
      21,          2.,          2.
      22,          3.,          2.
      25,          2.,          2.,          1.
      26,          3.,          2.,          1.
      27,          4.,          0.
      28,         4.5,          0.
      29,          5.,          0.
      30,          4.,         0.5
      31,         4.5,         0.5
      32,          5.,         0.5
      33,          4.,          1.
      34,         4.5,          1.
      35,          5.,          1.
      36,          4.,          0.,         0.5
      37,         4.5,          0.,         0.5
      38,          5.,          0.,         0.5
      39,          4.,         0.5,         0.5
      40,          5.,         0.5,         0.5
      41,          4.,          1.,         0.5
      42,         4.5,          1.,         0.5
      43,          5.,          1.,         0.5
      44,          4.,          0.,          1.
      45,         4.5,          0.,          1.
      46,          5.,          0.,          1.
      47,          4.,         0.5,          1.
      48,         4.5,         0.5,          1.
      49,          5.,         0.5,          1.
      50,          4.,          1.,          1.
      51,         4.5,          1.,          1.
      52,          5.,          1.,          1.
      56,          4.,         1.5
      57,         4.5,         1.5
      58,          5.,         1.5
      59,          4.,          2.
      60,         4.5,          2.
      61,          5.,          2.
      65,          4.,         1.5,         0.5
      66,          5.,         1.5,         0.5
      67,          4.,          2.,         0.5
      68,         4.5,          2.,         0.5
      69,          5.,          2.,         0.5
      73,          4.,         1.5,          1.
      74,         4.5,         1.5,          1.
      75,          5.,         1.5,          1.
      76,          4.,          2.,          1.
      77,         4.5,          2.,          1.
      78,          5.,          2.,          1.
** pre-tension section nodes
*NODE,NSET=NREF
    1001,          0.,          0.
    1002,          0.,          0.
    1003,          0.,          0.
    1004,          0.,          0.
**
*ELEMENT, TYPE=T3D2, ELSET=ETLIN
       1,       1,       2
       2,       2,       4
*ELEMENT, TYPE=T3D3 , ELSET=ETQUAD
       3,       5,       6,       7
       4,       7,       9,      10
*ELEMENT, TYPE=C3D8R, ELSET=EHEX
       5,      11,      12,      14,      13,      15,      16,
      18,      17
       6,      13,      14,      22,      21,      17,      18,
      26,      25
*ELEMENT, TYPE=C3D10M, ELSET=ETET
       7,      27,      33,      44,      29,      30,      39,      36,
      28,      31,      37
       8,      50,      44,      33,      52,      47,      39,      41,
      51,      48,      42
       9,      35,      29,      52,      33,      32,      40,      43,
      34,      31,      42
      10,      46,      52,      29,      44,      49,      40,      38,
      45,      48,      37
      11,      29,      33,      44,      52,      31,      39,      37,
      40,      42,      48
      12,      59,      76,      33,      61,      67,      65,      56,
      60,      68,      57
      13,      50,      33,      76,      52,      41,      65,      73,
      51,      42,      74
      14,      35,      52,      61,      33,      43,      66,      58,
      34,      42,      57
      15,      78,      61,      52,      76,      69,      66,      75,
      77,      68,      74
      16,      33,      61,      76,      52,      57,      68,      65,
      42,      66,      74
*SOLID SECTION,ELSET=ETLIN,MATERIAL=MAT
0.03, 
*SOLID SECTION,ELSET=ETQUAD,MATERIAL=MAT
0.03, 
*SOLID SECTION,ELSET=EHEX,MATERIAL=MAT
*SOLID SECTION,ELSET=ETET,MATERIAL=MAT
*MATERIAL,NAME=MAT
*ELASTIC
1.E5,0.3
**
** Node sets for BCs
**
*NSET, NSET=NFIXED
       1,        5
*NSET, NSET=ZSYMM
      11,      12,      13,      14,      21,      22,      27,      28,
      29,      30,      31,      32,      33,      34,      35,      56,
      57,      58,      59,      60,      61,       4,       10
*NSET, NSET=XSYMM
      11,      13,      15,      17,      21,      25,      27,      30,
      33,      36,      39,      41,      44,      47,      50,      56,
      59,      65,      67,      73,      76,       4,       10
*NSET, NSET=YSYMM
      11,      12,      15,      16,      27,      28,      29,      36,
      37,      38,      44,      45,       46
*NSET, NSET=NPULL
       4,      10,      21,      22,      25,      26,      59,      60,
      61,      67,      68,      69,      76,      77,       78
**
** Pre-tension Sections
**
*PRE-TENSION SECTION,ELEMENT=1,NODE=1001
*PRE-TENSION SECTION,ELEMENT=3,NODE=1002
*surface,NAME=SHEX
5,S5
*PRE-TENSION SECTION,SURFACE=SHEX,NODE=1003
*surface,NAME=STET
8,S4
9,S4
*PRE-TENSION SECTION,SURFACE=STET,NODE=1004
**
** Analysis
**
*STEP,NLGEOM
pre-tension section by tightening
*STATIC
*BOUNDARY
NFIXED,1,3
XSYMM,1,,
YSYMM,2,,
ZSYMM,3,,
NPULL,2,,
NREF,1,,0.1
*NODE FILE
U,RF
*EL FILE
S,E
*END STEP
*STEP,PERTURBATION,NLGEOM
perturbation about tightened state
*STATIC
*BOUNDARY
NPULL,2,,0.1
*NODE FILE
U,RF
*EL FILE
S,E
*ENDSTEP
*STEP,NLGEOM
further loading from initial tightened state
*STATIC
*BOUNDARY
NPULL,2,,0.1
*ENDSTEP