{"id":392745,"date":"2024-11-05T09:42:14","date_gmt":"2024-11-05T09:42:14","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/what-is-bulk-fail-why-does-liquefaction-not-occur\/"},"modified":"2024-11-05T09:42:14","modified_gmt":"2024-11-05T09:42:14","slug":"what-is-bulk-fail-why-does-liquefaction-not-occur","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/what-is-bulk-fail-why-does-liquefaction-not-occur\/","title":{"rendered":"What is &#8220;Bulk Fail&#8221;? Why does liquefaction not occur?"},"content":{"rendered":"<p>&lt;p&gt;I am performing an ultra-high speed impact analysis using Autodyn&#8217;s SPH.&lt;br&gt;The impact speed of the projectile is 7 km\/s, and normally the impacting object will liquefy upon impact, becoming a group of fragments called a debris cloud.&lt;br&gt;When I checked the state of the material during this analysis, I found that there were no particles that corresponded to &#8220;Void, Hydro&#8221;, and liquefaction had not occurred.&lt;br&gt;Regarding this error, I first thought that the EOS Thermal settings (reference temperature, specific heat) were involved, but I cited appropriate literature values \u200b\u200bfrom Shock EOS, so I think there is probably no problem.&lt;br&gt;Could you please tell me why liquefaction did not occur in the analysis?&lt;br&gt;Also, could you please tell me what state &#8220;Bulk Fail&#8221;, which accounts for the majority of the particles in the figure, indicates?&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/11\/05-11-2024-1730798684-mceclip0.png\" \/>&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-392745","topic","type-topic","status-publish","hentry","topic-tag-explicitdynamicssolverautodyne-1","topic-tag-2d-axisymmetric","topic-tag-mechanical"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["70001","83"],"_bbp_author_ip":["130.34.95.40"],"_btv_view_count":["400"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["392745"],"_bbp_forum_id":["27814"],"_bbp_engagement":["83","70001"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["393047"],"_bbp_last_active_id":["393047"],"_bbp_last_active_time":["2024-11-06 18:22:26"],"_bbp_likes_count":["1"]},"test":"kikuji-yuki-r3dc-tohoku-ac-jp"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/392745","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\/392745\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=392745"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}