{"id":285370,"date":"2023-05-23T18:20:33","date_gmt":"2023-05-23T18:20:33","guid":{"rendered":"\/forum\/forums\/topic\/spg-self-penetration-after-fracture\/"},"modified":"2023-05-23T18:30:11","modified_gmt":"2023-05-23T18:30:11","slug":"spg-self-penetration-after-fracture","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/spg-self-penetration-after-fracture\/","title":{"rendered":"SPG self penetration after fracture"},"content":{"rendered":"<p>I am trying to model uniaxial compression test of cylindrical specimen using SPG method in LS-Dyna R13.1 in Workbench. I use MAT_024 to define yield stress and MAT_ADD_GISSMO with very small strain to failure (LCSDG) to model &#8220;brittle&#8221; fracture. IN SECTION_SOLID_SPG I set IDAM = &#8220;Programm Controlled&#8221; and Self-Contact Indicator (ISC) equal to YES (1). So I hoped that destroyed particles will interact with each other even after specimen crushed.<\/p>\n<p>But when the specimen was crushed the two halves started to move towards each other and I see the penetration of the material (see figures). Therefore the particles don&#8217;t interact with each other.<\/p>\n<p>Could someone explain why is that so and how can I fix this?<\/p>\n<p>Maybe I have to define glocal contact in the whole model?<img loading=\"lazy\" decoding=\"async\" title=\"Before crushing\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/05\/23-05-2023-1684866538-1.png\" alt=\"\" width=\"503\" height=\"270\"><img loading=\"lazy\" decoding=\"async\" title=\"After crushing with self-penetration\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/05\/23-05-2023-1684866568-2.png\" alt=\"\" width=\"499\" height=\"268\"><\/p>\n","protected":false},"template":"","class_list":["post-285370","topic","type-topic","status-closed","hentry","topic-tag-ansys-ls-dyna-1","topic-tag-ansys-workbench-ls-dyna"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["283739","181804"],"_bbp_author_ip":["168.143.243.24"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["887"],"_edit_lock":["1684866124:216543"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["285370"],"_bbp_forum_id":["27814"],"_bbp_engagement":["181804","283739"],"_bbp_voice_count":["2"],"_bbp_reply_count":["4"],"_bbp_last_reply_id":["286146"],"_bbp_last_active_id":["286146"],"_bbp_last_active_time":["2023-05-29 10:08:21"]},"test":"dadidal96gmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/285370","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\/285370\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=285370"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}