{"id":396015,"date":"2024-12-02T21:26:40","date_gmt":"2024-12-02T21:26:40","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/396015\/"},"modified":"2024-12-02T21:46:21","modified_gmt":"2024-12-02T21:46:21","slug":"396015","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/396015\/","title":{"rendered":"Reply To: LS-Dyna, Negative volume problem."},"content":{"rendered":"<p>&lt;p&gt;Hi,&lt;\/p&gt;&lt;p&gt;To address the issue with termination due to the mass increase, you can either deactivate or reduce the mass scaling (i.e. decrease the time step size).&nbsp;&lt;\/p&gt;&lt;p&gt;The element quality graph also shows that there is a need for mesh refinement. The element metric should not fall below 0.2. Avoid using very fine mesh sizes. Try to generate more uniform mesh size distributions.&nbsp;&nbsp;&lt;\/p&gt;&lt;p&gt;Replace tetrahedral elements with hexahedral elements if possible. The tetrahedral elements are normally more computationally expensive and result in stiff predictions.&nbsp;&lt;\/p&gt;&lt;p&gt;I hope these tips help.&lt;\/p&gt;&lt;p&gt;Thanks,&lt;\/p&gt;&lt;p&gt;Pedram&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-396015","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"acf":[],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/396015","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/reply"}],"version-history":[{"count":2,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/396015\/revisions"}],"predecessor-version":[{"id":396017,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/396015\/revisions\/396017"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=396015"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}