{"id":441124,"date":"2025-09-10T05:48:13","date_gmt":"2025-09-10T05:48:13","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/ansys-spaceclaim-high-order-nurbs-surfaces-when-making-stl-a-solid-and-meshing\/"},"modified":"2025-09-10T05:48:13","modified_gmt":"2025-09-10T05:48:13","slug":"ansys-spaceclaim-high-order-nurbs-surfaces-when-making-stl-a-solid-and-meshing","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/ansys-spaceclaim-high-order-nurbs-surfaces-when-making-stl-a-solid-and-meshing\/","title":{"rendered":"ANSYS Spaceclaim &#8211; High Order NURBS Surfaces when making STL a solid and meshing"},"content":{"rendered":"<p>&lt;p&gt;Hi all,&lt;\/p&gt;&lt;p&gt;I&#8217;ve been having trouble with an STL file of femur cartilage which was exported from an MRI of a knee. Basically, I&#8217;ve been trying to <strong>convert the STL file to a solid<\/strong> (I&#8217;ve tried two methods &#8211; one by right clicking and converting to solid and clicking through entire repair tab, and the other method by shrinkwrapping about 0.5mm or less and then autoskinning). <strong>The converting STL to solid goes well, but when meshing using default options the mesh fails.&nbsp;<\/strong>&lt;\/p&gt;&lt;p&gt;<strong>The femur cartilage geometry is very thin<\/strong>, about 0.8mm in some parts, and 1.5mm in the majority. When importing to geometry, <strong>ANSYS warns about high order NURBS surfaces causing issues<\/strong>, and the surfaces which it warns about are consistently missing from the mesh later on (even when the mesh fails), unless I shrinkwrap using 0.1mm or less.&nbsp;&lt;\/p&gt;&lt;p&gt;<strong>I&#8217;ve determined that the high order NURBS surfaces are the issue<\/strong> and have looked through so many online forums and this forum for answers. I have tried all repair options available. I don&#8217;t have access to Solidworks. How can I resolve this within ANSYS Workbench 23.1 (student version), Creo Parametric, Onshape or similar?&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-441124","topic","type-topic","status-publish","hentry","topic-tag-ansysworkbench-ansys-staticstructural","topic-tag-mechanical","topic-tag-meshing","topic-tag-student-version","topic-tag-workbench"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27791"],"_bbp_topic_id":["441124"],"_bbp_subscription":["593800","240"],"_bbp_author_ip":["134.148.69.89"],"_bbp_last_reply_id":["442150"],"_bbp_last_active_id":["442150"],"_bbp_last_active_time":["2025-09-24 07:51:38"],"_bbp_reply_count":["2"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["593800","240"],"_btv_view_count":["231"],"_bbp_topic_status":["unanswered"]},"test":"paris-alforduon-edu-au"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/441124","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\/441124\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=441124"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}