{"id":428658,"date":"2025-04-11T13:02:07","date_gmt":"2025-04-11T13:02:07","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/large-deflection-analysis-of-foam-material\/"},"modified":"2025-04-11T13:02:07","modified_gmt":"2025-04-11T13:02:07","slug":"large-deflection-analysis-of-foam-material","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/large-deflection-analysis-of-foam-material\/","title":{"rendered":"Large Deflection Analysis of Foam Material"},"content":{"rendered":"

<p>Hi everyone,<\/p><p>I am trying to set up a 2D static analysis of a foam material that is compressed on one side to about half its thickness:<\/p><p><\/p><p><\/p><p>As a result, the elements close to the compression plate exhibit a large deformation, causing my simulation to fail no matter what I try. However, I think this should be doable, as similar working examples have been posted online. The material of the foam is defined as such:<\/p><p>TB,hyper,matid,1,2,foam ! Units of MPa<br>TBDATA,  1,0.003595230317364466,1.4745768145906895,0.003595236891314886,1.4745768210058428<br>TBDATA,5,7.789397958302508,7.789397953328129<\/p><p>The compression plate is more or less undeformable. To make the simulation converge, I have tried the following things:<\/p><\/p>\n

    \n
  1. A lot of substeps<\/li>\n
  2. Refining the mesh<\/li>\n
  3. Nonlinear adaptive region and trying almost every option this method has<\/li>\n
  4. Switching to Uniform reduced integration with hourglass control (this did converge, but the results where highly unphysical)<\/li>\n<\/ol>\n

    <p>The convergence fails almost always because of large element distortion. Although th remeshing seems to work fine (as shown above), the solver is not able to find a solution after some point. So maybe the meshing is not even the problem, but then I do not know what is.<\/p><p>I am really looking forward to your answers, as I am totally clueless on whats going on here. Any help is much appreciated!<\/p><p>Best regards <\/p><\/p>\n","protected":false},"template":"","class_list":["post-428658","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27791"],"_bbp_topic_id":["428658"],"_bbp_subscription":["350330","275204","240"],"_bbp_author_ip":["137.226.86.171"],"_bbp_last_reply_id":["429597"],"_bbp_last_active_id":["429597"],"_bbp_last_active_time":["2025-04-22 13:07:53"],"_bbp_reply_count":["6"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["3"],"_bbp_engagement":["350330","275204","240"],"_btv_view_count":["313"],"_bbp_topic_status":["unanswered"],"_edit_lock":["1744727019:350330"]},"test":"boettnertme-rwth-aachen-de"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/428658","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\/428658\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=428658"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}