*HEADING
 GEOTECHNICAL ANALYSIS WITH CPE4P,CPE4RP,CPE4PH and CPE4RPH ELEMENTS 
 AND DIFFERENT MATERIALS: COMPUTATION OF INITIAL STATE WITH 
 ZERO (SMALL) DISPLACEMENTS
**
**   .................... PART DEFINITION
**
*PART,NAME=PART2
  *NODE,NSET=SOIL
   1, 0.0, 0.0
   2, 1.0, 0.0
   3, 1.0, 1.0
   4, 0.0, 1.0
   **
   5, 2.0, 0.0
   6, 3.0, 0.0
   7, 3.0, 1.0
   8, 2.0, 1.0
  *NSET,NSET=TOP
   3,4,7,8
  *NSET,NSET=BOTTOM
   1,2,5,6
  *NSET,NSET=LEFT
   1,4,5,8
  *ELEMENT,TYPE=CPE4P,ELSET=SOIL
   1, 1,2,3,4
  *ELEMENT,TYPE=CPE4RP,ELSET=SOIL
   2, 5,6,7,8
  *ELSET,ELSET=EHG
   2,
*END PART
*PART,NAME=PART4
  *NODE,NSET=SOIL
   1, 0.0, 0.0
   2, 1.0, 0.0
   3, 1.0, 1.0
   4, 0.0, 1.0
   **
   5, 2.0, 0.0
   6, 3.0, 0.0
   7, 3.0, 1.0
   8, 2.0, 1.0
   **
   9, 4.0, 0.0
  10, 5.0, 0.0
  11, 5.0, 1.0
  12, 4.0, 1.0
   **
  13, 6.0, 0.0
  14, 7.0, 0.0
  15, 7.0, 1.0
  16, 6.0, 1.0
  *NSET,NSET=TOP
   3,4,7,8,11,12,15,16
  *NSET,NSET=BOTTOM
   1,2,5,6, 9,10,13,14
  *NSET,NSET=LEFT
   1,4,5,8, 9,12,13,16
  *ELEMENT,TYPE=CPE4P,ELSET=SOIL
   1, 1,2,3,4
  *ELEMENT,TYPE=CPE4RP,ELSET=SOIL
   2, 5,6,7,8
  *ELEMENT,TYPE=CPE4PH,ELSET=SOIL
   3, 9,10,11,12
  *ELEMENT,TYPE=CPE4RPH,ELSET=SOIL
   4, 13,14,15,16
  *ELSET,ELSET=EHG
   2,4
*END PART
**
**   .................... ASSEMBLY
**
*ASSEMBLY,NAME=GEOASSEMBLY
**
**   ... INSTANCES
**
*INSTANCE,NAME=IELA,PART=PART4
 0,0,0
 *SOLID SECTION,MATERIAL=MATELA, ELSET=SOIL, CONTROLS=SC
*END INSTANCE
*INSTANCE,NAME=IPOR,PART=PART2
 0,2,0
 *SOLID SECTION,MATERIAL=MATPOR, ELSET=SOIL, CONTROLS=SC
*END INSTANCE
*END ASSEMBLY
**
**   .................... SETS
**
*NSET,NSET=TOP
 IELA.TOP,IPOR.TOP
*NSET,NSET=BOTTOM
 IELA.BOTTOM,IPOR.BOTTOM
*NSET,NSET=LEFT
 IELA.LEFT,IPOR.LEFT
*NSET,NSET=SOIL
 IELA.SOIL,IPOR.SOIL
*ELSET,ELSET=SOIL
 IELA.SOIL,IPOR.SOIL
*ELSET,ELSET=EHG
 IELA.EHG,IPOR.EHG
**
**   .................... MATERIALS
**
**   ... Elastic 
**
*MATERIAL,NAME=MATELA
*ELASTIC
 1000.0,0.3
*PERMEABILITY,SPECIFIC=10.0
 1.0,0.0
**
**   ... Porous Elastic
**
*MATERIAL,NAME=MATPOR
*POROUS ELASTIC
 .026,.3,100.0
*PERMEABILITY,SPECIFIC=10.0
 1.0,0.0
**
*SECTION CONTROLS, NAME=SC, HOURGLASS=ENHANCED
**
**   .................... INITIAL CONDITIONS
**
*INITIAL CONDITIONS,TYPE=RATIO
 SOIL,1.08,0.,1.08,1.
**
**   .................... ZERO BOUNDARY CONDITIONS
**
*BOUNDARY
 LEFT,   1,1
 BOTTOM, 2,2
**
**   .................... STEP
**
*RESTART,WRITE,FREQ=1
*STEP,UNSYM=YES
  GEOSTATIC INITIAL STRESS STATE
*GEOSTATIC,UTOL
 0.25,1.0
*DLOAD
 SOIL,P2,100.
*BOUNDARY
 BOTTOM, 8,8
 TOP,    8,8, 100.0
*OUTPUT,FIELD,FREQ=1
*ELEMENT OUTPUT
 S,E,PE
*NODE OUTPUT
 U,POR
*END STEP