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<p class="MsoNormal"><span style="font-size:12.0pt;color:#002060">Depending on the complexity of your model boundaries, you may be able to achieve the desired internal stress state with the “surface traction” load option.  If you select the “general” traction
 type (rather than the default “shear”), you can specify loading vectors that are oblique to the surface.  I’ve used this approach successfully for relatively simple models but it can be a bit tedious specifying all the necessary surface loads to achieve a
 stable/balanced internal stress state.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:#002060"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:#002060">--Kevin<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:#002060"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#002060">*************************************************************</span><span style="color:#002060"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#002060">Kevin J. Smart, Ph.D., P.G.</span><span style="color:#002060"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#002060">Department of Earth, Material, & Planetary Sciences</span><span style="color:#002060"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#002060">Geosciences & Engineering Division</span><span style="color:#002060"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#002060">Southwest Research Institute</span><span style="color:#002060"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#002060">San Antonio, TX  78238-5166</span><span style="color:#002060"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#002060">Phone: (210) 522-5859;  Fax: (210) 522-5155</span><span style="color:#002060"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#002060">Email: 
<a href="mailto:ksmart@swri.org"><span style="color:blue">ksmart@swri.org</span></a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><a href="http://www.swri.org/4org/d20/home/what/eed.htm"><span style="color:blue">geoscience.swri.org</span></a></span><span style="font-size:10.0pt;color:#002060"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Geoqus [mailto:geoqus-bounces+ksmart=swri.org@lists.ruhr-uni-bochum.de]
<b>On Behalf Of </b>Coblentz, David<br>
<b>Sent:</b> Thursday, November 21, 2013 10:11 AM<br>
<b>To:</b> Geoscientific Abaqus User Group<br>
<b>Subject:</b> Re: [Geoqus] Applying pressure<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;color:black">I've only used the pressure boundary condition for applying stresses and I've had to add a margin with sides at a particular angle to apply rotated stresses.  Not very convenient, to say the least.
   I'm interested to hear if any other users have a been method.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;color:black">Regards,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;color:black">David Coblentz<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="color:black">From: </span></b><span style="color:black">Hani Farouq Abul Khair <<a href="mailto:hani.abulkhair@adelaide.edu.au">hani.abulkhair@adelaide.edu.au</a>><br>
<b>Reply-To: </b>Geoscientific Abaqus User Group <<a href="mailto:geoqus@lists.ruhr-uni-bochum.de">geoqus@lists.ruhr-uni-bochum.de</a>><br>
<b>Date: </b>Wednesday, November 20, 2013 4:41 PM<br>
<b>To: </b>"<a href="mailto:'geoqus@lists.ruhr-uni-bochum.de">'geoqus@lists.ruhr-uni-bochum.de</a>'" <<a href="mailto:geoqus@lists.ruhr-uni-bochum.de">geoqus@lists.ruhr-uni-bochum.de</a>>, "<a href="mailto:'abaqus@yahoogroups.com">'abaqus@yahoogroups.com</a>'"
 <<a href="mailto:abaqus@yahoogroups.com">abaqus@yahoogroups.com</a>><br>
<b>Subject: </b>[Geoqus] Applying pressure<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-AU" style="color:black">Hi All<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:black">I am trying to apply pressure as boundary conditions to simulate the principle stresses in Abaqus<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:black">Is it better to use pressure as the load or there is another way of doing it?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:black">Can I assign the load as a pressure in angle?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:black">Kindly if anyone can help I appreciate it<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:black">Regards<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:black;mso-fareast-language:EN-AU">Dr. Hani Abul Khair</span><span lang="EN-AU" style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:black;mso-fareast-language:EN-AU">Research Fellow</span><span lang="EN-AU" style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:black;mso-fareast-language:EN-AU">Structural Geology / Geomechanics</span><span lang="EN-AU" style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:black;mso-fareast-language:EN-AU"> </span><span lang="EN-AU" style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:black;mso-fareast-language:EN-AU"><img border="0" width="163" height="93" id="Picture_x0020_1" src="cid:image001.png@01CEE6A9.3EAF9940" alt="Description: Description: Description: logo_a.tif">                 
</span><span lang="EN-AU" style="color:#1F497D;mso-fareast-language:EN-AU"><img border="0" width="416" height="78" id="Picture_x0020_2" src="cid:image002.jpg@01CEE6A9.3EAF9940" alt="Description: Presentation4f"></span><span lang="EN-AU" style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:#1F497D;mso-fareast-language:EN-AU">                                        <img border="0" width="94" height="79" id="Picture_x0020_3" src="cid:image003.jpg@01CEE6A9.3EAF9940" alt="Description: Presentation2">        </span><span lang="EN-AU" style="color:black;mso-fareast-language:EN-AU">                                                              
<img border="0" width="88" height="88" id="Picture_x0020_6" src="cid:image004.png@01CEE6A9.3EAF9940" alt="Description: Description: Description: geofrac3.tif"></span><span lang="EN-AU" style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="font-size:14.0pt;color:#984806;mso-fareast-language:EN-AU">Centre for Tectonics Resources and Exploration</span><span lang="EN-AU" style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:black;mso-fareast-language:EN-AU"> </span><span lang="EN-AU" style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:black;mso-fareast-language:EN-AU"> </span><span lang="EN-AU" style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:black;mso-fareast-language:EN-AU">Australian School of Petroleum</span><span lang="EN-AU" style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:black;mso-fareast-language:EN-AU">Unconventional Resources Program</span><span lang="EN-AU" style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:black;mso-fareast-language:EN-AU">University of Adelaide</span><span lang="EN-AU" style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:black;mso-fareast-language:EN-AU">Adelaide 5005</span><span lang="EN-AU" style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:black;mso-fareast-language:EN-AU">Australia</span><span lang="EN-AU" style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:black;mso-fareast-language:EN-AU"> </span><span lang="EN-AU" style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:black;mso-fareast-language:EN-AU">Santos Petroleum Engineering Building</span><span lang="EN-AU" style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:black;mso-fareast-language:EN-AU">Level 3 / room 302E</span><span lang="EN-AU" style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:black;mso-fareast-language:EN-AU">Tel: + 61 (0)8 8313 8043</span><span lang="EN-AU" style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:black;mso-fareast-language:EN-AU">Fax: + 61 (0)8 8303 4345</span><span lang="EN-AU" style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:black;mso-fareast-language:EN-AU">Email:
<a href="mailto:Hani.abulkhair@adelaide.edu.au"><span style="color:blue">Hani.abulkhair@adelaide.edu.au</span></a></span><span lang="EN-AU" style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:black;mso-fareast-language:EN-AU">Web:
<a href="https://urldefense.proofpoint.com/v1/url?u=http://www.adelaide.edu.au/directory/Hani.abulkhair&k=PCy7eyfFfObklJZLFhSrcw%3D%3D%0A&r=lp%2BZmq3hOLY1FvNzxA7ENA%3D%3D%0A&m=DB7h%2FnED2dYpRl1wI%2FTVPN0%2FbwPpLU3pOLOLJZfoRcA%3D%0A&s=4a9a26053a48b0ffa4b27c2b508762839336c6d60de39efe94cf8179c92f7209">
<span style="color:blue">www.adelaide.edu.au/directory/Hani.abulkhair</span></a> and
<a href="https://urldefense.proofpoint.com/v1/url?u=http://www.asp.adelaide.edu.au/&k=PCy7eyfFfObklJZLFhSrcw%3D%3D%0A&r=lp%2BZmq3hOLY1FvNzxA7ENA%3D%3D%0A&m=DB7h%2FnED2dYpRl1wI%2FTVPN0%2FbwPpLU3pOLOLJZfoRcA%3D%0A&s=97e45d2ccd8596008876bc788c8294d4b7beed82726dd9d8bc075a392a5065a6">
<span style="color:blue">www.asp.adelaide.edu.au</span></a></span><span lang="EN-AU" style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:black"> <o:p></o:p></span></p>
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