*HEADING
 GEOTECHNICAL ANALYSIS WITH CAX8P1 and CAX8RP1 ELEMENTS 
 AND DIFFERENT MATERIALS: COMPUTATION OF INITIAL STATE 
 WITH ZERO (SMALL) DISPLACEMENTS
**
**   .................... PART DEFINITION
**
*PART,NAME=PART2
  *NODE
   1, 0.0,0.0
   2, 1.0,0.0
   3, 1.0,1.0
   4, 0.0,1.0
   5, 0.5,0.0
   6, 1.0,0.5
   7, 0.5,1.0
   8, 0.0,0.5
   **
   9, 2.0,0.0
  10, 3.0,0.0
  11, 3.0,1.0
  12, 2.0,1.0
  13, 2.5,0.0
  14, 3.0,0.5
  15, 2.5,1.0
  16, 2.0,0.5
  *NSET,NSET=SOIL,GEN
     1,16
   101,116
  *NSET,NSET=TOP
   3,4,7,11,12,15, 103,104,107,111,112,115
  *NSET,NSET=BOTTOM
   1,2,5,9,10,13, 101,102,105,109,110,113,
  *NSET,NSET=LEFT
   1,4,8,9,12,16, 101,104,108,109,112,116,
  *ELEMENT,TYPE=CAXA8P1,OFFSET=100,ELSET=SOIL
   1, 1,2,3,4, 5,6,7,8
  *ELEMENT,TYPE=CAXA8RP1,OFFSET=100,ELSET=SOIL
   2, 9,10,11,12,13,14,15,16
*END PART
**
**   .................... ASSEMBLY
**
*ASSEMBLY,NAME=GEOASSEMBLY
**
**   ... INSTANCES
**
*INSTANCE,NAME=IELA,PART=PART2
 0,0,0
 *SOLID SECTION,MATERIAL=MATELA, ELSET=SOIL
*END INSTANCE
*INSTANCE,NAME=IPOR,PART=PART2
 0,3,0
 *SOLID SECTION,MATERIAL=MATPOR, ELSET=SOIL
*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.
*INITIAL CONDITIONS,TYPE=STRESS
 SOIL,-10.,-10.,-10.
**
**   .................... ZERO BOUNDARY CONDITIONS
**
*BOUNDARY
 LEFT,   1,1
 BOTTOM, 2,2
**
**   .................... 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