Memo about initial geostress

2 methods:

1. *initial conditions, type=stress, geostatic
add the gravity in a Geostatic to balance
this is suitable for simple soil configuration
2. use imported initial stress file, this file is from a previous analysis (static is fine).
(1) use parts
from the previous analysis, Report->Field Output->Centroid->S11, S22, ...S12...
process the report file and make it looks like:
part1-1.1, 10., 10., 10.,10.
...
(2) do not use parts
<1> script command line: mdb.models['Model-1'].setValues(noPartsInputFile=ON)
<2> Abaqus environment file (abaqus_v6.env): cae_no_parts_input_file=ON
same as (1) but this is no "part1-1."

*initial conditions,type=stress,input=Geostress.csv