{"id":392465,"date":"2024-11-02T08:11:23","date_gmt":"2024-11-02T08:11:23","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/mohr-coulomb-stress-safety-tool\/"},"modified":"2024-11-02T08:14:14","modified_gmt":"2024-11-02T08:14:14","slug":"mohr-coulomb-stress-safety-tool","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/mohr-coulomb-stress-safety-tool\/","title":{"rendered":"Mohr-Coulomb Stress Safety Tool"},"content":{"rendered":"<p>&lt;p&gt;&lt;p style=&#8221;text-align: justify;&#8221;&gt;&lt;p style=&#8221;text-align: justify;&#8221;&gt;&lt;p&gt;Hello,&lt;\/p&gt;&lt;p&gt;I am conducting a geomechanical analysis on sandstone. The hole in the center denotes a wellbore. The effective minimum horizontal stress is 3.23 MPa, acting in the X-direction, while the effective maximum horizontal stress is 5.25 MPa, acting in the Y-direction. The tensile and compressive ultimate strengths of sandstone are 2.08 MPa and 47.5 MPa, respectively. The maximum hoop stress occurs in the direction of the minimum horizontal stress (X-direction). Logically, shear failure should occur in that direction as well. However, when I calculated the safety factor using the Mohr-Coulomb stress tool, I observed that failure (Safety Factor&lt;1) is occurring in the direction of the maximum horizontal stress (Y-Direction), which seems inconsistent.&lt;\/p&gt;&lt;p&gt;I would greatly appreciate any assistance in resolving this issue. Thanks in advance.&lt;\/p&gt;&lt;p&gt; &lt;\/p&gt;&lt;p&gt;&lt;span style=&#8221;text-decoration: underline;&#8221;&gt;<strong>Hoop Stress<\/strong>&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;<strong><img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/11\/02-11-2024-1730534371-p2.jpg\" alt=\"\" \/><\/strong>&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;&lt;span style=&#8221;text-decoration: underline;&#8221;&gt;<strong>Safety Factor<\/strong>&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span style=&#8221;text-decoration: underline;&#8221;&gt;<strong><img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/11\/02-11-2024-1730534455-p1.jpg\" alt=\"\" \/><\/strong>&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;&lt;span style=&#8221;text-decoration: underline;&#8221;&gt;<strong>Maximum Principal Stress<\/strong>&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span style=&#8221;text-decoration: underline;&#8221;&gt;<strong><img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/11\/02-11-2024-1730534614-p3.jpg\" alt=\"\" \/><\/strong>&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;&lt;span style=&#8221;text-decoration: underline;&#8221;&gt;<strong>Minimum Principal Stress<\/strong>&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span style=&#8221;text-decoration: underline;&#8221;&gt;<strong><img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/11\/02-11-2024-1730534661-p4.jpg\" alt=\"\" \/><\/strong>&lt;\/span&gt;&lt;\/p&gt;&lt;\/p&gt;&lt;\/p&gt;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-392465","topic","type-topic","status-publish","hentry","topic-tag-ansysworkbench-ansys-staticstructural","topic-tag-brittle-failure","topic-tag-failure-criteria","topic-tag-FailureModel-1","topic-tag-mohr-coulomb-1","topic-tag-safety-factor","topic-tag-static-structural","topic-tag-StressAnalysis-1","topic-tag-stress-result"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["296047","471944"],"_bbp_author_ip":["142.3.46.192"],"_btv_view_count":["680"],"_bbp_topic_status":["unanswered"],"_edit_last":["296047"],"_bbp_revision_log":["a:3:{i:392466;a:2:{s:6:\"author\";i:296047;s:6:\"reason\";s:0:\"\";}i:392467;a:2:{s:6:\"author\";i:296047;s:6:\"reason\";s:0:\"\";}i:392468;a:2:{s:6:\"author\";i:296047;s:6:\"reason\";s:0:\"\";}}"],"_bbp_topic_id":["392465"],"_bbp_forum_id":["27791"],"_bbp_engagement":["296047","471944"],"_bbp_voice_count":["2"],"_bbp_reply_count":["5"],"_bbp_last_reply_id":["393067"],"_bbp_last_active_id":["393067"],"_bbp_last_active_time":["2024-11-06 21:52:14"]},"test":"fan134uregina-ca"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/392465","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":3,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/392465\/revisions"}],"predecessor-version":[{"id":392468,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/392465\/revisions\/392468"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=392465"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}