{"id":165444,"date":"2023-03-17T09:00:18","date_gmt":"2023-03-17T09:00:18","guid":{"rendered":"\/knowledge\/forums\/topic\/why-does-classic-drucker-prager-plasticity-defined-via-command-object-not-work-in-workbench-18-2\/"},"modified":"2023-07-31T12:31:16","modified_gmt":"2023-07-31T12:31:16","slug":"why-does-classic-drucker-prager-plasticity-defined-via-command-object-not-work-in-workbench-18-2","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/why-does-classic-drucker-prager-plasticity-defined-via-command-object-not-work-in-workbench-18-2\/","title":{"rendered":"Why does Classic Drucker Prager plasticity defined via command object not work in Workbench 18.2?"},"content":{"rendered":"<p>The &#8220;TB,DP&#8221; Drucker-Prager material is for legacy elements. It has many limitations, and it is not supported by current-technology elements. Please use &#8220;TB,EDP&#8221; (Extended Drucker-Prager) material instead. When you use TB,DP, since it is not supported by the current-technology elements, that input is ignored, so the material is treated as linear elastic only.  For &#8220;TB,EDP&#8221;, the input coefficients are not the same as &#8220;TB,DP&#8221;. Please see the following memo for conversion of the older Drucker-Prager material to the Extended Drucker-Prager material:     http:\/\/ansys.net\/collection\/1096<\/p>\n","protected":false},"template":"","class_list":["post-165444","topic","type-topic","status-publish","hentry","topic-tag-4391","topic-tag-materials","topic-tag-mechanical","topic-tag-plasticity","topic-tag-structural-mechanics"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_wp_page_template":["default"],"_bbp_last_active_time":["3\/15\/2023 20:20"],"_bbp_forum_id":["27814"],"_bbp_author_ip":["23.56.168.180"],"_btv_view_count":["913"],"siebel_km_number":["2054251"],"product_version":["19"],"km_published_date":["2018-04-19T00:00:00.000Z"],"family":["Structural Mechanics"],"application_name":["Mechanical"]},"test":"articlesansys-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/165444","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/165444\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/media?parent=165444"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}