[Geoqus] Far Field Stresses
Jozina Dirkzwager
jozina.dirkzwager at beg.utexas.edu
Tue Mar 27 23:03:22 CEST 2007
Manooch,
I don't know if they'll work for your problem but read up on the
"infinite elements".
The manual is pretty straight forward about their implementation.
Good luck
Jose
________________________________
From:
geoqus-bounces+jozina.dirkzwager=beg.utexas.edu at lists.ruhr-uni-bochum.de
[mailto:geoqus-bounces+jozina.dirkzwager=beg.utexas.edu at lists.ruhr-uni-b
ochum.de] On Behalf Of Manooch Salehabadi
Sent: Tuesday, March 27, 2007 3:52 PM
To: Geoscientific Abaqus User Group
Subject: Far Field Stresses
Dear All,
hi and sorry for this simple question , i am just a beginner with
ABAQUS.
i am trying to model a bore hole in mohr coulomb media (rock) with plain
strain element CPE8RP, but i do not know how
to include far field stress in the model?
i have used simple hollow cylindrical model with loading as following to
simulate far field stresses:
*Step, name="Equilibrium Step", nlgeom=YES
*Soils, consolidation, end=PERIOD, utol=10., creep=none
100., 14400., 0.144, 14400.,
** LOADS
**
** Name: Far Field Stress Type: Pressure
*Dsload
"Outer Boundary Surface", P, 24.
** Name: Mud Pressure-surface Type: Pressure
*Dsload
"wellbore Face", P, 20.
**
unit is in MPa , i considered 24 Mpa as far field stress and 20 Mpa as
borehole pressure ,also i have considered
18 Mpa as an initial pore pressure , but i didnot get reasonable
results.!
i will be much appreciated for any comments.
Regards
Manooch
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