*HEADING
Pre-tension Section Test []
Procedures Tested: Static Riks
Elements Tested: CPE8
**
*RESTART,WRITE
*NODE
      21,          5.,          0.
      22,         5.5,          0.
      23,          6.,          0.
      24,          5.,         0.5
      25,          6.,         0.5
      26,          5.,          1.
      27,         5.5,          1.
      28,          6.,          1.
      32,          5.,         1.5
      33,          6.,         1.5
      34,          5.,          2.
      35,         5.5,          2.
      36,          6.,          2.
** pre-tension section node
*NODE,NSET=NREF
    1001,          0.,          0.
*ELEMENT, TYPE=CPE8, ELSET=ECPE
       9,      21,      23,      28,      26,      22,      25,
      27,      24
      10,      26,      28,      36,      34,      27,      33,
      35,      32
*MATERIAL,NAME=MAT
*ELASTIC
1.E5,0.3
*SOLID SECTION,ELSET=ECPE,MATERIAL=MAT
0.1, 
**
** Node sets for BCs
**
*NSET, NSET=XSYMM
21,24,26,32,34
*NSET,NSET=YSYMM
21,22,23
*NSET, NSET=NPULL
34,35,36
**
** Pre-tension Section
**
*surface,NAME=SCPE
9,S3
*PRE-TENSION SECTION,SURFACE=SCPE,NODE=1001
**
** Analysis
**
*STEP
pre-tension section by tightening
*STATIC
*BOUNDARY
XSYMM,1,1
YSYMM,2,2
NPULL,2,2
NREF,1,,0.1
*NODE FILE
U,RF
*EL FILE
S,E
*END STEP
*STEP
further loading from initial state
*STATIC,RIKS
1.,1.,,,1.
*BOUNDARY
NPULL,2,2,0.1
*ENDSTEP