{"id":394161,"date":"2024-11-19T02:21:30","date_gmt":"2024-11-19T02:21:30","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/mohr_coulomb-material-model-mat_173\/"},"modified":"2024-11-19T02:21:30","modified_gmt":"2024-11-19T02:21:30","slug":"mohr_coulomb-material-model-mat_173","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/mohr_coulomb-material-model-mat_173\/","title":{"rendered":"Mohr_Coulomb material model (MAT_173)"},"content":{"rendered":"<p>&lt;p&gt;Hi&lt;\/p&gt;&lt;p&gt;I am trying to do an element test for seeing the behavior of MAT_173 in ls-dyna. I have a solid element (1x1x1m) and I apply 5 cm horizontal displacement to the top nodes. I fix the base nodes. When I check the shear stress diagram in ls-prepost, I do not see the mohr coulomb cap for it. I mean that according to the mohr coulomb shear strength equation, &#8220;\\tau = \\sigma * tan(\\phi) + c&#8221; where \\tau is shear strength, \\sigma is normal stress, \\phi is friction angle and \\c is soil cohesion. According to the hand calculation, when I have such a solid element, the shear strength has to be more than c, since normal stress in compression and phi are positive, but the value I get is less than that.&lt;\/p&gt;&lt;p&gt;Does anybody know what am I doing wrong?&lt;\/p&gt;&lt;p&gt;Thanks&lt;\/p&gt;&lt;p&gt;Mostafa&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-394161","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["446916","471944"],"_bbp_author_ip":["134.197.36.248"],"_btv_view_count":["470"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["394161"],"_bbp_forum_id":["27814"],"_bbp_engagement":["446916","471944"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["394832"],"_bbp_last_active_id":["394832"],"_bbp_last_active_time":["2024-11-21 16:31:48"]},"test":"mostafamunr-edu"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/394161","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":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/394161\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=394161"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}