*HEADING
 GEOTECHNICAL ANALYSIS WITH CAX4P,CAX4RP,CAX4PH and CAX4RPH 
 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=CAX4P,ELSET=SOIL
   1, 1,2,3,4
  *ELEMENT,TYPE=CAX4RP,ELSET=SOIL
   2, 5,6,7,8
*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=CAX4P,ELSET=SOIL
   1, 1,2,3,4
  *ELEMENT,TYPE=CAX4RP,ELSET=SOIL
   2, 5,6,7,8
  *ELEMENT,TYPE=CAX4PH,ELSET=SOIL
   3, 9,10,11,12
  *ELEMENT,TYPE=CAX4RPH,ELSET=SOIL
   4, 13,14,15,16
*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
 0,3,0
 *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
**
**   .................... 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
**
**   .................... INITIAL CONDITIONS
**
*INITIAL CONDITIONS,TYPE=RATIO
 SOIL,1.08,0.,1.08,1.
**
**   .................... ZERO BOUNDARY CONDITIONS
**
*BOUNDARY
 LEFT,   1,1
 BOTTOM, 2,2
**
*SECTION CONTROLS,NAME=SC,HOURGLASS=ENHANCED
**
**   .................... STEP
**
*STEP,UNSYM=YES
  GEOSTATIC INITIAL STRESS STATE
*GEOSTATIC,UTOL
*DLOAD
 SOIL,P2,100.
*BOUNDARY
 BOTTOM, 8,8
 TOP,    8,8, 100.0
*OUTPUT,FIELD,FREQ=10
*ELEMENT OUTPUT
 S,E,PE
*NODE OUTPUT
 U,POR
*END STEP