*HEADING
Pre-tension Section Test []
Procedures Tested: Static
Elements Tested: CPE4, CPS6M, C3D8
**
*NODE
       1,          0.,          0.
       2,          1.,          0.
       3,          0.,          1.
       4,          1.,          1.
       7,          0.,          2.
       8,          1.,          2.
       9,          2.,          0.
      10,         2.5,          0.
      11,          3.,          0.
      12,          2.,         0.5
      13,         2.5,         0.5
      14,          3.,         0.5
      15,          2.,          1.
      16,         2.5,          1.
      17,          3.,          1.
      21,          2.,         1.5
      22,         2.5,         1.5
      23,          3.,         1.5
      24,          2.,          2.
      25,         2.5,          2.
      26,          3.,          2.
      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.
    1002,          0.,          0.
    1003,          0.,          0.
    1004,          0.,          0.
**
*ELEMENT, TYPE=CPE4, ELSET=ECPE
       1,       1,       2,       4,       3
       2,       3,       4,       8,       7
*ELEMENT, TYPE=CPS6M, ELSET=ECPS
       3,      17,      15,       9,      16,      12,      13
       4,       9,      11,      17,      10,      14,      13
       5,      26,      24,      15,      25,      21,      22
       6,      15,      17,      26,      16,      23,      22
*ELEMENT, TYPE=C3D8, ELSET=EC3D
       7,      27,      28,      30,      29,      31,      32,
      34,      33
       8,      29,      30,      38,      37,      33,      34,
      42,      41
**local orientation matching global system 
*ORIENTATION,NAME=RECT
 1.0, 0.0, 0.0, 0.0, 1.0, 0.0
 1, 0.0
*SOLID SECTION,ELSET=EC3D,MATERIAL=MAT,ORIENT=RECT
*SOLID SECTION,ELSET=ECPE,MATERIAL=MAT,ORIENT=RECT
1.0, 
*SOLID SECTION,ELSET=ECPS,MATERIAL=MAT,ORIENT=RECT
1.0, 
*MATERIAL,NAME=MAT
*ELASTIC,TYPE=ENGINEERING CONSTANTS
1.E5,1.E4,1.E3,0.3,0.3,0.3,3.8E4,3.8E4,
3.8E4, 
**
** Node Sets for Boundary Conditions
**
*NSET, NSET=XSYMM
       1,       3,       7,       9,      12,      15,      21,      24,
      27,      29,      31,      33,      37,       41
*NSET, NSET=YSYMM
       1,       2,       9,      10,      11,      27,      28,      31,
     ,   32
*NSET, NSET=ZSYMM
      27,      28,      29,      30,      37,       38
*NSET, NSET=NPULL
       7,       8,      24,      25,      26,      37,      38,      41,
     ,   42
**
** Pre-tension Sections
**
*surface,NAME=SCPE
1,S3
*PRE-TENSION SECTION, SURFACE=SCPE, NODE=1001
*surface,NAME=SCPS
3,S1
*PRE-TENSION SECTION, SURFACE=SCPS, NODE=1002
*surface,NAME=SC3D
7,S5
*PRE-TENSION SECTION, SURFACE=SC3D, NODE=1003
**
** Analysis
**
*STEP
pre-tension section by tightening
*STATIC
*BOUNDARY
XSYMM,1,,
YSYMM,2,,
ZSYMM,3,,
NPULL,2,,
NREF,1,,0.1
*NODE FILE
U,RF
*EL FILE
S,E
*END STEP
*STEP
further loading from initial tightened state
*STATIC
*BOUNDARY
NPULL,2,,0.1
*ENDSTEP