*INCLUDE, INPUT=all.msh
*INCLUDE, INPUT=fix.nam
*INCLUDE, INPUT=mid.nam
*INCLUDE, INPUT=interface.nam

*MATERIAL, Name=TPU
*ELASTIC
  26.15e+6, 0.48
*DENSITY
  1206
*SOLID SECTION, Elset=Eall, Material=TPU

**-------------- STEP 1 : RAMP FORCE
*STEP, NLGEOM, INC=100000000, AMPLITUDE=RAMP
*DYNAMIC, DIRECT
  1.0e-07,1.e-3
*BOUNDARY
  Nfix,1,3,0
*CLOAD
  Ninterface, 1, 0.0
  Ninterface, 2, 0.0
  Ninterface, 3, 0.0
*DLOAD
*INCLUDE, INPUT=top.dlo
*NODE FILE, FREQUENCY=100
  U
*NODE PRINT, NSET=Nmid, FREQUENCY=100
  U
*END STEP

**-------------- STEP 2 : CONTINUOUS FORCE
*STEP,NLGEOM, INC=100000000
*DYNAMIC, DIRECT
 1.0e-07,1.
*BOUNDARY
  Nfix,1,3,0
*CLOAD
 Ninterface, 1, 0.0
 Ninterface, 2, 0.0
 Ninterface, 3, 0.0
*DLOAD
*INCLUDE, INPUT=top.dlo
*NODE FILE, FREQUENCY=100
  U
*NODE PRINT, NSET=Nmid, FREQUENCY=100
  U
*END STEP